From: JinWang An Date: Mon, 27 Mar 2023 08:02:49 +0000 (+0900) Subject: Imported Upstream version 62.3.0 X-Git-Tag: upstream/62.3.0^0 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8e5c66c9d5867dded117a04836382799c655f965;p=platform%2Fupstream%2Fpython-setuptools.git Imported Upstream version 62.3.0 --- diff --git a/.bumpversion.cfg b/.bumpversion.cfg index 7fb9cd1..8232140 100644 --- a/.bumpversion.cfg +++ b/.bumpversion.cfg @@ -1,5 +1,5 @@ [bumpversion] -current_version = 62.2.0 +current_version = 62.3.0 commit = True tag = True diff --git a/CHANGES.rst b/CHANGES.rst index 54fc15b..be005ad 100644 --- a/CHANGES.rst +++ b/CHANGES.rst @@ -1,3 +1,49 @@ +v62.3.0 +------- + + +Deprecations +^^^^^^^^^^^^ +* #3262: Formally added deprecation messages for ``namespace_packages``. + The methodology that uses ``pkg_resources`` and ``namespace_packages`` for + creating namespaces was already discouraged by the :doc:`setuptools docs + ` and the + :doc:`Python Packaging User Guide `, + therefore this change just make the deprecation more official. + Users can consider migrating to native/implicit namespaces (as introduced in + :pep:`420`). +* #3308: Relying on ``include_package_data`` to ensure sub-packages are automatically + added to the build wheel distribution (as "data") is now considered a + deprecated practice. + + This behaviour was controversial and caused inconsistencies (#3260). + + Instead, projects are encouraged to properly configure ``packages`` or use + discovery tools. General information can be found in :doc:`userguide/package_discovery`. + +Changes +^^^^^^^ +* #1806: Allowed recursive globs (`**`) in `package_data`. -- by :user:`nullableVoidPtr` +* #3206: Fixed behaviour when both ``install_requires`` (in ``setup.py``) and + ``dependencies`` (in ``pyproject.toml``) are specified. + The configuration in ``pyproject.toml`` will take precedence over ``setup.py`` + (in accordance with PEP 621). A warning was added to inform users. + +Documentation changes +^^^^^^^^^^^^^^^^^^^^^ +* #3307: Added introduction to references/keywords + Added deprecation tags to test kwargs + Moved userguide/keywords to deprecated section + Clarified in deprecated doc what keywords came from distutils and which were added or changed by setuptools + +Misc +^^^^ +* #3274: Updated version of vendored ``pyparsing`` to 3.0.8 to avoid problems with + upcoming deprecation in Python 3.11. +* #3292: Added warning about incompatibility with old versions of + ``importlib-metadata``. + + v62.2.0 ------- @@ -352,6 +398,17 @@ Changes * #3098: Bump vendored packaging to 21.3. * Removed bootstrap script. +.. warning:: Users trying to install the unmaintained :pypi:`pathlib` backport + from PyPI/``sdist``/source code may find problems when using ``setuptools >= 60.9.0``. + This happens because during the installation, the unmaintained + implementation of ``pathlib`` is loaded and may cause compatibility problems + (it does not expose the same public API defined in the Python standard library). + + Whenever possible users should avoid declaring ``pathlib`` as a dependency. + An alternative is to pre-build a wheel for ``pathlib`` using a separated + virtual environment with an older version of setuptools and install the + library directly from the pre-built wheel. + v60.8.2 ------- diff --git a/docs/build_meta.rst b/docs/build_meta.rst index 57aea98..dc4c2f3 100644 --- a/docs/build_meta.rst +++ b/docs/build_meta.rst @@ -12,16 +12,16 @@ uses a ``setup()`` function within the ``setup.py`` script. Commands such as ``python setup.py bdist`` or ``python setup.py bdist_wheel`` generate a distribution bundle and ``python setup.py install`` installs the distribution. This interface makes it difficult to choose other packaging tools without an -overhaul. Because ``setup.py`` scripts allowed for arbitrary execution, it -proved difficult to provide a reliable user experience across environments +overhaul. Because ``setup.py`` scripts allow for arbitrary execution, it +is difficult to provide a reliable user experience across environments and history. `PEP 517 `_ therefore came to -rescue and specified a new standard to -package and distribute Python modules. Under PEP 517: +the rescue and specified a new standard to package and distribute Python +modules. Under PEP 517: - a ``pyproject.toml`` file is used to specify what program to use - for generating distribution. + A ``pyproject.toml`` file is used to specify what program to use + for generating the distribution. Then, two functions provided by the program, ``build_wheel(directory: str)`` and ``build_sdist(directory: str)`` create the distribution bundle at the @@ -32,21 +32,23 @@ package and distribute Python modules. Under PEP 517: installation. If ``*.whl`` is available, ``pip`` will go ahead and copy the files into ``site-packages`` directory. If not, ``pip`` will look at ``pyproject.toml`` and decide what program to use to 'build from source' - (the default is ``setuptools``) + (the default is ``setuptools``). -With this standard, switching between packaging tools becomes a lot easier. ``build_meta`` -implements ``setuptools``' build system support. +With this standard, switching between packaging tools is a lot easier. ``build_meta`` +implements ``setuptools``'s build system support. How to use it? -------------- -Starting with a package that you want to distribute. You will need your source -scripts, a ``pyproject.toml`` file and a ``setup.cfg`` file:: +Start with a package that you want to distribute. You will need your source +files, a ``pyproject.toml`` file and a ``setup.cfg`` file:: ~/meowpkg/ pyproject.toml setup.cfg - meowpkg/__init__.py + meowpkg/ + __init__.py + module.py The pyproject.toml file is required to specify the build system (i.e. what is being used to package your scripts and install from source). To use it with @@ -116,7 +118,6 @@ specified by :pep:`517`, is to "tweak" ``setuptools.build_meta`` by using a If you add the following configuration to your ``pyproject.toml``: - .. code-block:: toml [build-system] diff --git a/docs/conf.py b/docs/conf.py index 4ebb521..1023539 100644 --- a/docs/conf.py +++ b/docs/conf.py @@ -129,6 +129,12 @@ html_theme_options = { }, } +# Redirect old docs so links and references in the ecosystem don't break +extensions += ['sphinx_reredirects'] +redirects = { + "userguide/keywords": "/deprecated/changed_keywords.html", +} + # Add support for inline tabs extensions += ['sphinx_inline_tabs'] diff --git a/docs/deprecated/changed_keywords.rst b/docs/deprecated/changed_keywords.rst new file mode 100644 index 0000000..7db372f --- /dev/null +++ b/docs/deprecated/changed_keywords.rst @@ -0,0 +1,112 @@ +New and Changed ``setup()`` Keywords +==================================== + +This document tracks historical differences between ``setuptools`` and +``distutils``. + +Since ``distutils`` was scheduled for removal from the standard library in +Python 3.12, and ``setuptools`` started its adoption, these differences became less +relevant. +Please check :doc:`/references/keywords` for a complete list of keyword +arguments that can be passed to the ``setuptools.setup()`` function and +a their full description. + +.. tab:: Supported by both ``distutils`` and ``setuptoools`` + + ``name`` string + + ``version`` string + + ``description`` string + + ``long_description`` string + + ``long_description_content_type`` string + + ``author`` string + + ``author_email`` string + + ``maintainer`` string + + ``maintainer_email`` string + + ``url`` string + + ``download_url`` string + + ``packages`` list + + ``py_modules`` list + + ``scripts`` list + + ``ext_package`` string + + ``ext_modules`` list + + ``classifiers`` list + + ``distclass`` Distribution subclass + + ``script_name`` string + + ``script_args`` list + + ``options`` dictionary + + ``license`` string + + ``license_file`` string **deprecated** + + ``license_files`` list + + ``keywords`` string or list + + ``platforms`` list + + ``cmdclass`` dictionary + + ``data_files`` list **deprecated** + + ``package_dir`` dictionary + + ``requires`` string or list **deprecated** + + ``obsoletes`` list **deprecated** + + ``provides`` list + +.. tab:: Added or changed by ``setuptoools`` + + ``include_package_data`` bool + + ``exclude_package_data`` dictionary + + ``package_data`` dictionary + + ``zip_safe`` bool + + ``install_requires`` string or list + + ``entry_points`` dictionary + + ``extras_require`` dictionary + + ``python_requires`` string + + ``setup_requires`` string or list **deprecated** + + ``dependency_links`` list **deprecated** + + ``namespace_packages`` list + + ``test_suite`` string or function **deprecated** + + ``tests_require`` string or list **deprecated** + + ``test_loader`` class **deprecated** + + ``eager_resources`` list + + ``project_urls`` dictionary diff --git a/docs/deprecated/index.rst b/docs/deprecated/index.rst index 59fc7be..8169b3b 100644 --- a/docs/deprecated/index.rst +++ b/docs/deprecated/index.rst @@ -13,6 +13,7 @@ objectives. .. toctree:: :maxdepth: 1 + changed_keywords python_eggs easy_install distutils/index diff --git a/docs/references/keywords.rst b/docs/references/keywords.rst index c26b9d4..d366300 100644 --- a/docs/references/keywords.rst +++ b/docs/references/keywords.rst @@ -2,123 +2,210 @@ Keywords ======== +The following are keywords ``setuptools.setup()`` accepts. +They allow configuring the build process for a Python distribution or adding +metadata via a ``setup.py`` script placed at the root of your project. +All of them are optional; you do not have to supply them unless you need the +associated ``setuptools`` feature. + +Metadata and configuration supplied via ``setup()`` is complementary to (and +may be overwritten by) the information present in ``setup.cfg`` and ``pyproject.toml``. +Some important metadata, such as ``name`` and ``version``, may assume +a default *degenerate* value if not specified. + +Users are strongly encouraged to use a declarative config either via +:doc:`setup.cfg ` or :doc:`pyproject.toml +` and only rely on ``setup.py`` if they need to +tap into special behaviour that requires scripting (such as building C +extensions). + +.. note:: + When using declarative configs via ``pyproject.toml`` users can still keep a + very simple ``setup.py`` just to ensure editable installs are supported, for + example:: + + from setuptools import setup + + setup() + + Future versions of ``setuptools`` may support editable installs even + without ``setup.py``. + + +.. _keyword/name: + ``name`` A string specifying the name of the package. +.. _keyword/version: + ``version`` A string specifying the version number of the package. +.. _keyword/description: + ``description`` A string describing the package in a single line. +.. _keyword/long_description: + ``long_description`` A string providing a longer description of the package. +.. _keyword/long_description_content_type: + ``long_description_content_type`` A string specifying the content type is used for the ``long_description`` (e.g. ``text/markdown``) +.. _keyword/author: + ``author`` A string specifying the author of the package. +.. _keyword/author_email: + ``author_email`` A string specifying the email address of the package author. +.. _keyword/maintainer: + ``maintainer`` A string specifying the name of the current maintainer, if different from the author. Note that if the maintainer is provided, setuptools will use it as the author in ``PKG-INFO``. +.. _keyword/maintainer_email: + ``maintainer_email`` A string specifying the email address of the current maintainer, if different from the author. +.. _keyword/url: + ``url`` A string specifying the URL for the package homepage. +.. _keyword/download_url: + ``download_url`` A string specifying the URL to download the package. +.. _keyword/packages: + ``packages`` A list of strings specifying the packages that setuptools will manipulate. +.. _keyword/py_modules: + ``py_modules`` A list of strings specifying the modules that setuptools will manipulate. +.. _keyword/scripts: + ``scripts`` A list of strings specifying the standalone script files to be built and installed. +.. _keyword/ext_package: + ``ext_package`` A string specifying the base package name for the extensions provided by this package. +.. _keyword/ext_modules: + ``ext_modules`` A list of instances of ``setuptools.Extension`` providing the list of Python extensions to be built. +.. _keyword/classifiers: + ``classifiers`` A list of strings describing the categories for the package. +.. _keyword/distclass: + ``distclass`` A subclass of ``Distribution`` to use. +.. _keyword/script_name: + ``script_name`` A string specifying the name of the setup.py script -- defaults to ``sys.argv[0]`` +.. _keyword/script_args: + ``script_args`` A list of strings defining the arguments to supply to the setup script. +.. _keyword/options: + ``options`` A dictionary providing the default options for the setup script. +.. _keyword/license: + ``license`` A string specifying the license of the package. -``license_file`` +.. _keyword/license_file: +``license_file`` .. warning:: ``license_file`` is deprecated. Use ``license_files`` instead. -``license_files`` +.. _keyword/license_files: +``license_files`` A list of glob patterns for license related files that should be included. If neither ``license_file`` nor ``license_files`` is specified, this option defaults to ``LICEN[CS]E*``, ``COPYING*``, ``NOTICE*``, and ``AUTHORS*``. +.. _keyword/keywords: + ``keywords`` A list of strings or a comma-separated string providing descriptive meta-data. See: `PEP 0314`_. .. _PEP 0314: https://www.python.org/dev/peps/pep-0314/ +.. _keyword/platforms: + ``platforms`` A list of strings or comma-separated string. +.. _keyword/cmdclass: + ``cmdclass`` A dictionary providing a mapping of command names to ``Command`` subclasses. -``data_files`` +.. _keyword/data_files: +``data_files`` .. warning:: ``data_files`` is deprecated. It does not work with wheels, so it should be avoided. A list of strings specifying the data files to install. +.. _keyword/package_dir: + ``package_dir`` A dictionary providing a mapping of package to directory names. -``requires`` +.. _keyword/requires: +``requires`` .. warning:: ``requires`` is superseded by ``install_requires`` and should not be used anymore. -``obsoletes`` +.. _keyword/obsoletes: +``obsoletes`` .. warning:: ``obsoletes`` is currently ignored by ``pip``. @@ -135,8 +222,9 @@ Keywords e.g. Gorgon 2.3 gets subsumed into Torqued Python 1.0. When you install Torqued Python, the Gorgon distribution should be removed. -``provides`` +.. _keyword/provides: +``provides`` .. warning:: ``provides`` is currently ignored by ``pip``. @@ -164,7 +252,7 @@ Keywords Each package may be followed by an environment marker after a semicolon (e.g. ``foo; os_name == "posix"``). -.. Below are setuptools keywords, above are distutils +.. _keyword/include_package_data: ``include_package_data`` If set to ``True``, this tells ``setuptools`` to automatically include any @@ -172,12 +260,16 @@ Keywords your ``MANIFEST.in`` file. For more information, see the section on :ref:`Including Data Files`. +.. _keyword/exclude_package_data: + ``exclude_package_data`` A dictionary mapping package names to lists of glob patterns that should be *excluded* from your package directories. You can use this to trim back any excess files included by ``include_package_data``. For a complete description and examples, see the section on :ref:`Including Data Files`. +.. _keyword/package_data: + ``package_data`` A dictionary mapping package names to lists of glob patterns. For a complete description and examples, see the section on :ref:`Including Data @@ -187,17 +279,23 @@ Keywords in source control or are files that you don't want to include in your source distribution.) +.. _keyword/zip_safe: + ``zip_safe`` A boolean (True or False) flag specifying whether the project can be safely installed and run from a zip file. If this argument is not supplied, the ``bdist_egg`` command will have to analyze all of your project's contents for possible problems each time it builds an egg. +.. _keyword/install_requires: + ``install_requires`` A string or list of strings specifying what other distributions need to be installed when this one is. See the section on :ref:`Declaring Dependencies` for details and examples of the format of this argument. +.. _keyword/entry_points: + ``entry_points`` A dictionary mapping entry point group names to strings or lists of strings defining the entry points. Entry points are used to support dynamic @@ -206,28 +304,33 @@ Keywords of this argument. In addition, this keyword is used to support :ref:`Automatic Script Creation `. +.. _keyword/extras_require: + ``extras_require`` A dictionary mapping names of "extras" (optional features of your project) to strings or lists of strings specifying what other distributions must be installed to support those features. See the section on :ref:`Declaring Dependencies` for details and examples of the format of this argument. +.. _keyword/python_requires: + ``python_requires`` A string corresponding to a version specifier (as defined in PEP 440) for the Python version, used to specify the Requires-Python defined in PEP 345. -``setup_requires`` +.. _keyword/setup_requires: +``setup_requires`` .. warning:: - Using ``setup_requires`` is discouraged in favor of `PEP-518`_ + Using ``setup_requires`` is discouraged in favor of :pep:`518`. A string or list of strings specifying what other distributions need to be present in order for the *setup script* to run. ``setuptools`` will - attempt to obtain these (even going so far as to download them using - ``EasyInstall``) before processing the rest of the setup script or commands. - This argument is needed if you are using distutils extensions as part of - your build process; for example, extensions that process setup() arguments - and turn them into EGG-INFO metadata files. + attempt to obtain these before processing the + rest of the setup script or commands. This argument is needed if you + are using distutils extensions as part of your build process; for + example, extensions that process setup() arguments and turn them into + EGG-INFO metadata files. (Note: projects listed in ``setup_requires`` will NOT be automatically installed on the system where the setup script is being run. They are @@ -236,20 +339,25 @@ Keywords when the setup script is run, you should add them to ``install_requires`` **and** ``setup_requires``.) -.. _PEP-518: http://www.python.org/dev/peps/pep-0518/ +.. _keyword/dependency_links: ``dependency_links`` - .. warning:: ``dependency_links`` is deprecated. It is not supported anymore by pip. A list of strings naming URLs to be searched when satisfying dependencies. These links will be used if needed to install packages specified by ``setup_requires`` or ``tests_require``. They will also be written into - the egg's metadata for use by tools like EasyInstall to use when installing - an ``.egg`` file. + the egg's metadata for use during install by tools that support them. + +.. _keyword/namespace_packages: ``namespace_packages`` + .. warning:: + ``namespace_packages`` is deprecated in favor of native/implicit + namespaces (:pep:`420`). Check :doc:`the Python Packaging User Guide + ` for more information. + A list of strings naming the project's "namespace packages". A namespace package is a package that may be split across multiple project distributions. For example, Zope 3's ``zope`` package is a namespace @@ -261,6 +369,8 @@ Keywords does not contain any code other than a namespace declaration. See the section on :ref:`Namespace Packages` for more information. +.. _keyword/test_suite: + ``test_suite`` A string naming a ``unittest.TestCase`` subclass (or a package or module containing one or more of them, or a method of such a subclass), or naming @@ -270,27 +380,36 @@ Keywords added to the tests to be run. If the named suite is a package, any submodules and subpackages are recursively added to the overall test suite. - Specifying this argument enables use of the :ref:`test` command to run the + Specifying this argument enables use of the :ref:`test ` command to run the specified test suite, e.g. via ``setup.py test``. See the section on the - :ref:`test` command below for more details. + :ref:`test ` command below for more details. + + .. warning:: + .. deprecated:: 41.5.0 + The test command will be removed in a future version of ``setuptools``, + alongside any test configuration parameter. - New in 41.5.0: Deprecated the test command. +.. _keyword/tests_require: ``tests_require`` If your project's tests need one or more additional packages besides those needed to install it, you can use this option to specify them. It should be a string or list of strings specifying what other distributions need to be present for the package's tests to run. When you run the ``test`` - command, ``setuptools`` will attempt to obtain these (even going - so far as to download them using ``EasyInstall``). Note that these - required projects will *not* be installed on the system where the tests - are run, but only downloaded to the project's setup directory if they're - not already installed locally. + command, ``setuptools`` will attempt to obtain these. + Note that these required projects will *not* be installed on + the system where the tests are run, but only downloaded to the project's setup + directory if they're not already installed locally. - New in 41.5.0: Deprecated the test command. + .. warning:: + .. deprecated:: 41.5.0 + The test command will be removed in a future version of ``setuptools``, + alongside any test configuration parameter. .. _test_loader: +.. _keyword/test_loader: + ``test_loader`` If you would like to use a different way of finding tests to run than what setuptools normally uses, you can specify a module name and class name in @@ -312,7 +431,12 @@ Keywords as long as you use the ``tests_require`` option to ensure that the package containing the loader class is available when the ``test`` command is run. - New in 41.5.0: Deprecated the test command. + .. warning:: + .. deprecated:: 41.5.0 + The test command will be removed in a future version of ``setuptools``, + alongside any test configuration parameter. + +.. _keyword/eager_resources: ``eager_resources`` A list of strings naming resources that should be extracted together, if @@ -330,6 +454,8 @@ Keywords mess with it. For more details on how this argument works, see the section below on :ref:`Automatic Resource Extraction`. +.. _keyword/project_urls: + ``project_urls`` An arbitrary map of URL names to hyperlinks, allowing more extensible documentation of where various resources can be found than the simple diff --git a/docs/userguide/declarative_config.rst b/docs/userguide/declarative_config.rst index 52379db..2a65e6e 100644 --- a/docs/userguide/declarative_config.rst +++ b/docs/userguide/declarative_config.rst @@ -210,7 +210,7 @@ packages find:, find_namespace:, list-comma [# package_dir dict package_data section [#opt-1]_ exclude_package_data section -namespace_packages list-comma +namespace_packages list-comma [#opt-5]_ py_modules list-comma 34.4.0 data_files section 40.6.0 [#opt-4]_ ======================= =================================== =============== ========= @@ -243,6 +243,10 @@ data_files section 40.6.0 [# .. [#opt-4] ``data_files`` is deprecated and should be avoided. Please check :doc:`/userguide/datafiles` for more information. +.. [#opt-5] ``namespace_packages`` is deprecated in favour of native/implicit + namespaces (:pep:`420`). Check :doc:`the Python Packaging User Guide + ` for more information. + Compatibility with other tools ============================== diff --git a/docs/userguide/dependency_management.rst b/docs/userguide/dependency_management.rst index d15b45c..d507a58 100644 --- a/docs/userguide/dependency_management.rst +++ b/docs/userguide/dependency_management.rst @@ -439,5 +439,5 @@ This can be configured as shown in the example below. While the ``[build-system]`` table should always be specified in the ``pyproject.toml`` file, support for adding package metadata and build configuration options via the ``[project]`` and ``[tool.setuptools]`` tables is still - experimental and might change (or be completely removed) in future releases. + experimental and might change in future releases. See :doc:`/userguide/pyproject_config`. diff --git a/docs/userguide/index.rst b/docs/userguide/index.rst index 49655ac..74e9b1e 100644 --- a/docs/userguide/index.rst +++ b/docs/userguide/index.rst @@ -32,7 +32,6 @@ quickstart provides an overview of the new workflow. extension declarative_config pyproject_config - keywords commands functionalities_rewrite miscellaneous diff --git a/docs/userguide/keywords.rst b/docs/userguide/keywords.rst deleted file mode 100644 index 5388ffe..0000000 --- a/docs/userguide/keywords.rst +++ /dev/null @@ -1,163 +0,0 @@ -New and Changed ``setup()`` Keywords -==================================== - -The following keyword arguments to ``setup()`` are added or changed by -``setuptools``. All of them are optional; you do not have to supply them -unless you need the associated ``setuptools`` feature. - -``include_package_data`` - If set to ``True``, this tells ``setuptools`` to automatically include any - data files it finds inside your package directories that are specified by - your ``MANIFEST.in`` file. For more information, see the section on - :ref:`Including Data Files`. - -``exclude_package_data`` - A dictionary mapping package names to lists of glob patterns that should - be *excluded* from your package directories. You can use this to trim back - any excess files included by ``include_package_data``. For a complete - description and examples, see the section on :ref:`Including Data Files`. - -``package_data`` - A dictionary mapping package names to lists of glob patterns. For a - complete description and examples, see the section on :ref:`Including - Data Files`. You do not need to use this option if you are using - ``include_package_data``, unless you need to add e.g. files that are - generated by your setup script and build process. (And are therefore not - in source control or are files that you don't want to include in your - source distribution.) - -``zip_safe`` - A boolean (True or False) flag specifying whether the project can be - safely installed and run from a zip file. If this argument is not - supplied, the ``bdist_egg`` command will have to analyze all of your - project's contents for possible problems each time it builds an egg. - -``install_requires`` - A string or list of strings specifying what other distributions need to - be installed when this one is. See the section on :ref:`Declaring - Dependencies` for details and examples of the format of this argument. - -``entry_points`` - A dictionary mapping entry point group names to strings or lists of strings - defining the entry points. Entry points are used to support dynamic - discovery of services or plugins provided by a project. See :ref:`Dynamic - Discovery of Services and Plugins` for details and examples of the format - of this argument. In addition, this keyword is used to support - :ref:`Automatic Script Creation `. - -``extras_require`` - A dictionary mapping names of "extras" (optional features of your project) - to strings or lists of strings specifying what other distributions must be - installed to support those features. See the section on :ref:`Declaring - Dependencies` for details and examples of the format of this argument. - -``python_requires`` - A string corresponding to a version specifier (as defined in PEP 440) for - the Python version, used to specify the Requires-Python defined in PEP 345. - -``setup_requires`` - A string or list of strings specifying what other distributions need to - be present in order for the *setup script* to run. ``setuptools`` will - attempt to obtain these (using pip if available) before processing the - rest of the setup script or commands. This argument is needed if you - are using distutils extensions as part of your build process; for - example, extensions that process setup() arguments and turn them into - EGG-INFO metadata files. - - (Note: projects listed in ``setup_requires`` will NOT be automatically - installed on the system where the setup script is being run. They are - simply downloaded to the ./.eggs directory if they're not locally available - already. If you want them to be installed, as well as being available - when the setup script is run, you should add them to ``install_requires`` - **and** ``setup_requires``.) - -``dependency_links`` - A list of strings naming URLs to be searched when satisfying dependencies. - These links will be used if needed to install packages specified by - ``setup_requires`` or ``tests_require``. They will also be written into - the egg's metadata for use during install by tools that support them. - -``namespace_packages`` - A list of strings naming the project's "namespace packages". A namespace - package is a package that may be split across multiple project - distributions. For example, Zope 3's ``zope`` package is a namespace - package, because subpackages like ``zope.interface`` and ``zope.publisher`` - may be distributed separately. The egg runtime system can automatically - merge such subpackages into a single parent package at runtime, as long - as you declare them in each project that contains any subpackages of the - namespace package, and as long as the namespace package's ``__init__.py`` - does not contain any code other than a namespace declaration. See the - section below on :ref:`Namespace Packages` for more information. - -``test_suite`` - A string naming a ``unittest.TestCase`` subclass (or a package or module - containing one or more of them, or a method of such a subclass), or naming - a function that can be called with no arguments and returns a - ``unittest.TestSuite``. If the named suite is a module, and the module - has an ``additional_tests()`` function, it is called and the results are - added to the tests to be run. If the named suite is a package, any - submodules and subpackages are recursively added to the overall test suite. - - Specifying this argument enables use of the :ref:`test ` command to run the - specified test suite, e.g. via ``setup.py test``. See the section on the - :ref:`test ` command below for more details. - - New in 41.5.0: Deprecated the test command. - -``tests_require`` - If your project's tests need one or more additional packages besides those - needed to install it, you can use this option to specify them. It should - be a string or list of strings specifying what other distributions need to - be present for the package's tests to run. When you run the ``test`` - command, ``setuptools`` will attempt to obtain these (using pip if - available). Note that these required projects will *not* be installed on - the system where the tests are run, but only downloaded to the project's setup - directory if they're not already installed locally. - - New in 41.5.0: Deprecated the test command. - -.. _test_loader: - -``test_loader`` - If you would like to use a different way of finding tests to run than what - setuptools normally uses, you can specify a module name and class name in - this argument. The named class must be instantiable with no arguments, and - its instances must support the ``loadTestsFromNames()`` method as defined - in the Python ``unittest`` module's ``TestLoader`` class. Setuptools will - pass only one test "name" in the ``names`` argument: the value supplied for - the ``test_suite`` argument. The loader you specify may interpret this - string in any way it likes, as there are no restrictions on what may be - contained in a ``test_suite`` string. - - The module name and class name must be separated by a ``:``. The default - value of this argument is ``"setuptools.command.test:ScanningLoader"``. If - you want to use the default ``unittest`` behavior, you can specify - ``"unittest:TestLoader"`` as your ``test_loader`` argument instead. This - will prevent automatic scanning of submodules and subpackages. - - The module and class you specify here may be contained in another package, - as long as you use the ``tests_require`` option to ensure that the package - containing the loader class is available when the ``test`` command is run. - - New in 41.5.0: Deprecated the test command. - -``eager_resources`` - A list of strings naming resources that should be extracted together, if - any of them is needed, or if any C extensions included in the project are - imported. This argument is only useful if the project will be installed as - a zipfile, and there is a need to have all of the listed resources be - extracted to the filesystem *as a unit*. Resources listed here - should be "/"-separated paths, relative to the source root, so to list a - resource ``foo.png`` in package ``bar.baz``, you would include the string - ``bar/baz/foo.png`` in this argument. - - If you only need to obtain resources one at a time, or you don't have any C - extensions that access other files in the project (such as data files or - shared libraries), you probably do NOT need this argument and shouldn't - mess with it. For more details on how this argument works, see the section - below on :ref:`Automatic Resource Extraction`. - -``project_urls`` - An arbitrary map of URL names to hyperlinks, allowing more extensible - documentation of where various resources can be found than the simple - ``url`` and ``download_url`` options provide. diff --git a/docs/userguide/package_discovery.rst b/docs/userguide/package_discovery.rst index 38119bc..38e8dec 100644 --- a/docs/userguide/package_discovery.rst +++ b/docs/userguide/package_discovery.rst @@ -6,7 +6,7 @@ Package Discovery and Namespace Package .. note:: a full specification for the keyword supplied to ``setup.cfg`` or - ``setup.py`` can be found at :doc:`keywords reference ` + ``setup.py`` can be found at :doc:`keywords reference ` .. note:: the examples provided here are only to demonstrate the functionality @@ -567,8 +567,8 @@ The project layout remains the same and ``setup.cfg`` remains the same. .. [#experimental] Support for specifying package metadata and build configuration options via - ``pyproject.toml`` is experimental and might change (or be completely - removed) in the future. See :doc:`/userguide/pyproject_config`. + ``pyproject.toml`` is experimental and might change + in the future. See :doc:`/userguide/pyproject_config`. .. [#layout1] https://blog.ionelmc.ro/2014/05/25/python-packaging/#the-structure .. [#layout2] https://blog.ionelmc.ro/2017/09/25/rehashing-the-src-layout/ diff --git a/docs/userguide/pyproject_config.rst b/docs/userguide/pyproject_config.rst index 47c4511..8558f5d 100644 --- a/docs/userguide/pyproject_config.rst +++ b/docs/userguide/pyproject_config.rst @@ -10,7 +10,7 @@ Configuring setuptools using ``pyproject.toml`` files Support for declaring :doc:`project metadata ` or configuring ``setuptools`` via ``pyproject.toml`` files is still experimental and might - change (or be removed) in future releases. + change in future releases. .. important:: For the time being, ``pip`` still might require a ``setup.py`` file @@ -94,7 +94,7 @@ Key Value Type (TOML) Notes ``py-modules`` array See tip below ``packages`` array or ``find`` directive See tip below ``package-dir`` table/inline-table Used when explicitly listing ``packages`` -``namespace-packages`` array Not necessary if you use :pep:`420` +``namespace-packages`` array **Deprecated** - Use implicit namespaces instead (:pep:`420`) ``package-data`` table/inline-table See :doc:`/userguide/datafiles` ``include-package-data`` boolean ``True`` by default ``exclude-package-data`` table/inline-table diff --git a/docs/userguide/quickstart.rst b/docs/userguide/quickstart.rst index 2f77852..b157c35 100644 --- a/docs/userguide/quickstart.rst +++ b/docs/userguide/quickstart.rst @@ -131,7 +131,7 @@ the packages in your project directory: [options] packages = find: # OR `find_namespaces:` if you want to use namespaces - [options.packages.find] (always `find` even if `find_namespaces:` was used before) + [options.packages.find] # (always `find` even if `find_namespaces:` was used before) # This section is optional # Each entry in this section is optional, and if not specified, the default values are: # `where=.`, `include=*` and `exclude=` (empty). @@ -410,5 +410,5 @@ up-to-date references that can help you when it is time to distribute your work. While the ``[build-system]`` table should always be specified in the ``pyproject.toml`` file, support for adding package metadata and build configuration options via the ``[project]`` and ``[tool.setuptools]`` tables is still - experimental and might change (or be completely removed) in future releases. + experimental and might change in future releases. See :doc:`/userguide/pyproject_config`. diff --git a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/DESCRIPTION.rst b/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/DESCRIPTION.rst deleted file mode 100644 index e118723..0000000 --- a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/DESCRIPTION.rst +++ /dev/null @@ -1,3 +0,0 @@ -UNKNOWN - - diff --git a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/INSTALLER b/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/INSTALLER deleted file mode 100644 index a1b589e..0000000 --- a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/INSTALLER +++ /dev/null @@ -1 +0,0 @@ -pip diff --git a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/LICENSE.txt b/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/LICENSE.txt deleted file mode 100644 index bbc959e..0000000 --- a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/LICENSE.txt +++ /dev/null @@ -1,18 +0,0 @@ -Permission is hereby granted, free of charge, to any person obtaining -a copy of this software and associated documentation files (the -"Software"), to deal in the Software without restriction, including -without limitation the rights to use, copy, modify, merge, publish, -distribute, sublicense, and/or sell copies of the Software, and to -permit persons to whom the Software is furnished to do so, subject to -the following conditions: - -The above copyright notice and this permission notice shall be -included in all copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, -EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. -IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY -CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, -TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE -SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/METADATA b/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/METADATA deleted file mode 100644 index a15c350..0000000 --- a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/METADATA +++ /dev/null @@ -1,30 +0,0 @@ -Metadata-Version: 2.0 -Name: pyparsing -Version: 2.2.1 -Summary: Python parsing module -Home-page: https://github.com/pyparsing/pyparsing/ -Author: Paul McGuire -Author-email: ptmcg@users.sourceforge.net -License: MIT License -Download-URL: https://pypi.org/project/pyparsing/ -Platform: UNKNOWN -Classifier: Development Status :: 5 - Production/Stable -Classifier: Intended Audience :: Developers -Classifier: Intended Audience :: Information Technology -Classifier: License :: OSI Approved :: MIT License -Classifier: Operating System :: OS Independent -Classifier: Programming Language :: Python -Classifier: Programming Language :: Python :: 2 -Classifier: Programming Language :: Python :: 2.6 -Classifier: Programming Language :: Python :: 2.7 -Classifier: Programming Language :: Python :: 3 -Classifier: Programming Language :: Python :: 3.3 -Classifier: Programming Language :: Python :: 3.4 -Classifier: Programming Language :: Python :: 3.5 -Classifier: Programming Language :: Python :: 3.6 -Classifier: Programming Language :: Python :: 3.7 -Requires-Python: >=2.6, !=3.0.*, !=3.1.*, !=3.2.* - -UNKNOWN - - diff --git a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/RECORD b/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/RECORD deleted file mode 100644 index 09cc30e..0000000 --- a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/RECORD +++ /dev/null @@ -1,11 +0,0 @@ -__pycache__/pyparsing.cpython-310.pyc,, -pyparsing-2.2.1.dist-info/DESCRIPTION.rst,sha256=OCTuuN6LcWulhHS3d5rfjdsQtW22n7HENFRh6jC6ego,10 -pyparsing-2.2.1.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4 -pyparsing-2.2.1.dist-info/LICENSE.txt,sha256=081Pq74Spe1XdwrGkewNKSqa078kLIh7UWI-wVjdj8I,1041 -pyparsing-2.2.1.dist-info/METADATA,sha256=I0jhx9vpUYlQXjn4gVDnFFoAt3nNrxwR4iuqA_pknYs,1091 -pyparsing-2.2.1.dist-info/RECORD,, -pyparsing-2.2.1.dist-info/REQUESTED,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0 -pyparsing-2.2.1.dist-info/WHEEL,sha256=kdsN-5OJAZIiHN-iO4Rhl82KyS0bDWf4uBwMbkNafr8,110 -pyparsing-2.2.1.dist-info/metadata.json,sha256=v1_77-dSdajUZSItSJg8Ov9M713STY3PzhyrRvs1ax4,1185 -pyparsing-2.2.1.dist-info/top_level.txt,sha256=eUOjGzJVhlQ3WS2rFAy2mN3LX_7FKTM5GSJ04jfnLmU,10 -pyparsing.py,sha256=tmrp-lu-qO1i75ZzIN5A12nKRRD1Cm4Vpk-5LR9rims,232055 diff --git a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/REQUESTED b/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/REQUESTED deleted file mode 100644 index e69de29..0000000 diff --git a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/WHEEL b/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/WHEEL deleted file mode 100644 index 7332a41..0000000 --- a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/WHEEL +++ /dev/null @@ -1,6 +0,0 @@ -Wheel-Version: 1.0 -Generator: bdist_wheel (0.30.0) -Root-Is-Purelib: true -Tag: py2-none-any -Tag: py3-none-any - diff --git a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/metadata.json b/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/metadata.json deleted file mode 100644 index b760b76..0000000 --- a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/metadata.json +++ /dev/null @@ -1 +0,0 @@ -{"classifiers": ["Development Status :: 5 - Production/Stable", "Intended Audience :: Developers", "Intended Audience :: Information Technology", "License :: OSI Approved :: MIT License", "Operating System :: OS Independent", "Programming Language :: Python", "Programming Language :: Python :: 2", "Programming Language :: Python :: 2.6", "Programming Language :: Python :: 2.7", "Programming Language :: Python :: 3", "Programming Language :: Python :: 3.3", "Programming Language :: Python :: 3.4", "Programming Language :: Python :: 3.5", "Programming Language :: Python :: 3.6", "Programming Language :: Python :: 3.7"], "download_url": "https://pypi.org/project/pyparsing/", "extensions": {"python.details": {"contacts": [{"email": "ptmcg@users.sourceforge.net", "name": "Paul McGuire", "role": "author"}], "document_names": {"description": "DESCRIPTION.rst", "license": "LICENSE.txt"}, "project_urls": {"Home": "https://github.com/pyparsing/pyparsing/"}}}, "generator": "bdist_wheel (0.30.0)", "license": "MIT License", "metadata_version": "2.0", "name": "pyparsing", "requires_python": ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*", "summary": "Python parsing module", "version": "2.2.1"} \ No newline at end of file diff --git a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/top_level.txt b/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/top_level.txt deleted file mode 100644 index 210dfec..0000000 --- a/pkg_resources/_vendor/pyparsing-2.2.1.dist-info/top_level.txt +++ /dev/null @@ -1 +0,0 @@ -pyparsing diff --git a/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/INSTALLER b/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/INSTALLER new file mode 100644 index 0000000..a1b589e --- /dev/null +++ b/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/INSTALLER @@ -0,0 +1 @@ +pip diff --git a/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/LICENSE b/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/LICENSE new file mode 100644 index 0000000..1bf9852 --- /dev/null +++ b/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/LICENSE @@ -0,0 +1,18 @@ +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/METADATA b/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/METADATA new file mode 100644 index 0000000..d6c8e9b --- /dev/null +++ b/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/METADATA @@ -0,0 +1,105 @@ +Metadata-Version: 2.1 +Name: pyparsing +Version: 3.0.8 +Summary: pyparsing module - Classes and methods to define and execute parsing grammars +Author-email: Paul McGuire +Requires-Python: >=3.6.8 +Description-Content-Type: text/x-rst +Classifier: Development Status :: 5 - Production/Stable +Classifier: Intended Audience :: Developers +Classifier: Intended Audience :: Information Technology +Classifier: License :: OSI Approved :: MIT License +Classifier: Operating System :: OS Independent +Classifier: Programming Language :: Python +Classifier: Programming Language :: Python :: 3 +Classifier: Programming Language :: Python :: 3.6 +Classifier: Programming Language :: Python :: 3.7 +Classifier: Programming Language :: Python :: 3.8 +Classifier: Programming Language :: Python :: 3.9 +Classifier: Programming Language :: Python :: 3.10 +Classifier: Programming Language :: Python :: 3 :: Only +Classifier: Programming Language :: Python :: Implementation :: CPython +Classifier: Programming Language :: Python :: Implementation :: PyPy +Classifier: Typing :: Typed +Requires-Dist: railroad-diagrams ; extra == "diagrams" +Requires-Dist: jinja2 ; extra == "diagrams" +Project-URL: Homepage, https://github.com/pyparsing/pyparsing/ +Provides-Extra: diagrams + +PyParsing -- A Python Parsing Module +==================================== + +|Build Status| |Coverage| + +Introduction +============ + +The pyparsing module is an alternative approach to creating and +executing simple grammars, vs. the traditional lex/yacc approach, or the +use of regular expressions. The pyparsing module provides a library of +classes that client code uses to construct the grammar directly in +Python code. + +*[Since first writing this description of pyparsing in late 2003, this +technique for developing parsers has become more widespread, under the +name Parsing Expression Grammars - PEGs. See more information on PEGs* +`here `__ +*.]* + +Here is a program to parse ``"Hello, World!"`` (or any greeting of the form +``"salutation, addressee!"``): + +.. code:: python + + from pyparsing import Word, alphas + greet = Word(alphas) + "," + Word(alphas) + "!" + hello = "Hello, World!" + print(hello, "->", greet.parseString(hello)) + +The program outputs the following:: + + Hello, World! -> ['Hello', ',', 'World', '!'] + +The Python representation of the grammar is quite readable, owing to the +self-explanatory class names, and the use of '+', '|' and '^' operator +definitions. + +The parsed results returned from ``parseString()`` is a collection of type +``ParseResults``, which can be accessed as a +nested list, a dictionary, or an object with named attributes. + +The pyparsing module handles some of the problems that are typically +vexing when writing text parsers: + +- extra or missing whitespace (the above program will also handle ``"Hello,World!"``, ``"Hello , World !"``, etc.) +- quoted strings +- embedded comments + +The examples directory includes a simple SQL parser, simple CORBA IDL +parser, a config file parser, a chemical formula parser, and a four- +function algebraic notation parser, among many others. + +Documentation +============= + +There are many examples in the online docstrings of the classes +and methods in pyparsing. You can find them compiled into `online docs `__. Additional +documentation resources and project info are listed in the online +`GitHub wiki `__. An +entire directory of examples can be found `here `__. + +License +======= + +MIT License. See header of the `pyparsing.py `__ file. + +History +======= + +See `CHANGES `__ file. + +.. |Build Status| image:: https://github.com/pyparsing/pyparsing/actions/workflows/ci.yml/badge.svg + :target: https://github.com/pyparsing/pyparsing/actions/workflows/ci.yml +.. |Coverage| image:: https://codecov.io/gh/pyparsing/pyparsing/branch/master/graph/badge.svg + :target: https://codecov.io/gh/pyparsing/pyparsing + diff --git a/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/RECORD b/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/RECORD new file mode 100644 index 0000000..72947b0 --- /dev/null +++ b/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/RECORD @@ -0,0 +1,30 @@ +pyparsing-3.0.8.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4 +pyparsing-3.0.8.dist-info/LICENSE,sha256=ENUSChaAWAT_2otojCIL-06POXQbVzIGBNRVowngGXI,1023 +pyparsing-3.0.8.dist-info/METADATA,sha256=dEvZBGz3Owm5LYEaqDeKb6e3ZgOrF48WaCI_PG1n5BE,4207 +pyparsing-3.0.8.dist-info/RECORD,, +pyparsing-3.0.8.dist-info/REQUESTED,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0 +pyparsing-3.0.8.dist-info/WHEEL,sha256=jPMR_Dzkc4X4icQtmz81lnNY_kAsfog7ry7qoRvYLXw,81 +pyparsing/__init__.py,sha256=EMa1HCuq9HJhEDR8fUThu2gD0nl6Cs8FFEWZZ0eRCM8,9159 +pyparsing/__pycache__/__init__.cpython-38.pyc,, +pyparsing/__pycache__/actions.cpython-38.pyc,, +pyparsing/__pycache__/common.cpython-38.pyc,, +pyparsing/__pycache__/core.cpython-38.pyc,, +pyparsing/__pycache__/exceptions.cpython-38.pyc,, +pyparsing/__pycache__/helpers.cpython-38.pyc,, +pyparsing/__pycache__/results.cpython-38.pyc,, +pyparsing/__pycache__/testing.cpython-38.pyc,, +pyparsing/__pycache__/unicode.cpython-38.pyc,, +pyparsing/__pycache__/util.cpython-38.pyc,, +pyparsing/actions.py,sha256=60v7mETOBzc01YPH_qQD5isavgcSJpAfIKpzgjM3vaU,6429 +pyparsing/common.py,sha256=lFL97ooIeR75CmW5hjURZqwDCTgruqltcTCZ-ulLO2Q,12936 +pyparsing/core.py,sha256=zBzGw5vcSd58pB1QkYpY6O_XCcHVKX_nH5xglRx_L-M,213278 +pyparsing/diagram/__init__.py,sha256=oU_UEh6O5voKSFjUdq462_mpmURLOfUIsmWvxi1qgTQ,23003 +pyparsing/diagram/__pycache__/__init__.cpython-38.pyc,, +pyparsing/diagram/template.jinja2,sha256=SfQ8SLktSBqI5W1DGcUVH1vdflRD6x2sQBApxrcNg7s,589 +pyparsing/exceptions.py,sha256=H4D9gqMavqmAFSsdrU_J6bO-jA-T-A7yvtXWZpooIUA,9030 +pyparsing/helpers.py,sha256=EyjpgDOc3ivwRsU4VXxAWdgIs5gaqMDaLWcwRh5mqxc,39007 +pyparsing/py.typed,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0 +pyparsing/results.py,sha256=Hd6FAAh5sF8zGXpwsamdVqFUblIwyQf0FH0t7FCb1OY,25353 +pyparsing/testing.py,sha256=szs8AKZREZMhL0y0vsMfaTVAnpqPHetg6VKJBNmc4QY,13388 +pyparsing/unicode.py,sha256=IR-ioeGY29cZ49tG8Ts7ITPWWNP5G2DcZs58oa8zn44,10381 +pyparsing/util.py,sha256=kq772O5YSeXOSdP-M31EWpbH_ayj7BMHImBYo9xPD5M,6805 diff --git a/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/REQUESTED b/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/REQUESTED new file mode 100644 index 0000000..e69de29 diff --git a/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/WHEEL b/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/WHEEL new file mode 100644 index 0000000..c727d14 --- /dev/null +++ b/pkg_resources/_vendor/pyparsing-3.0.8.dist-info/WHEEL @@ -0,0 +1,4 @@ +Wheel-Version: 1.0 +Generator: flit 3.6.0 +Root-Is-Purelib: true +Tag: py3-none-any diff --git a/pkg_resources/_vendor/pyparsing.py b/pkg_resources/_vendor/pyparsing.py deleted file mode 100644 index cf75e1e..0000000 --- a/pkg_resources/_vendor/pyparsing.py +++ /dev/null @@ -1,5742 +0,0 @@ -# module pyparsing.py -# -# Copyright (c) 2003-2018 Paul T. McGuire -# -# Permission is hereby granted, free of charge, to any person obtaining -# a copy of this software and associated documentation files (the -# "Software"), to deal in the Software without restriction, including -# without limitation the rights to use, copy, modify, merge, publish, -# distribute, sublicense, and/or sell copies of the Software, and to -# permit persons to whom the Software is furnished to do so, subject to -# the following conditions: -# -# The above copyright notice and this permission notice shall be -# included in all copies or substantial portions of the Software. -# -# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, -# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. -# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY -# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, -# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE -# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. -# - -__doc__ = \ -""" -pyparsing module - Classes and methods to define and execute parsing grammars -============================================================================= - -The pyparsing module is an alternative approach to creating and executing simple grammars, -vs. the traditional lex/yacc approach, or the use of regular expressions. With pyparsing, you -don't need to learn a new syntax for defining grammars or matching expressions - the parsing module -provides a library of classes that you use to construct the grammar directly in Python. - -Here is a program to parse "Hello, World!" (or any greeting of the form -C{", !"}), built up using L{Word}, L{Literal}, and L{And} elements -(L{'+'} operator gives L{And} expressions, strings are auto-converted to -L{Literal} expressions):: - - from pyparsing import Word, alphas - - # define grammar of a greeting - greet = Word(alphas) + "," + Word(alphas) + "!" - - hello = "Hello, World!" - print (hello, "->", greet.parseString(hello)) - -The program outputs the following:: - - Hello, World! -> ['Hello', ',', 'World', '!'] - -The Python representation of the grammar is quite readable, owing to the self-explanatory -class names, and the use of '+', '|' and '^' operators. - -The L{ParseResults} object returned from L{ParserElement.parseString} can be accessed as a nested list, a dictionary, or an -object with named attributes. - -The pyparsing module handles some of the problems that are typically vexing when writing text parsers: - - extra or missing whitespace (the above program will also handle "Hello,World!", "Hello , World !", etc.) - - quoted strings - - embedded comments - - -Getting Started - ------------------ -Visit the classes L{ParserElement} and L{ParseResults} to see the base classes that most other pyparsing -classes inherit from. Use the docstrings for examples of how to: - - construct literal match expressions from L{Literal} and L{CaselessLiteral} classes - - construct character word-group expressions using the L{Word} class - - see how to create repetitive expressions using L{ZeroOrMore} and L{OneOrMore} classes - - use L{'+'}, L{'|'}, L{'^'}, and L{'&'} operators to combine simple expressions into more complex ones - - associate names with your parsed results using L{ParserElement.setResultsName} - - find some helpful expression short-cuts like L{delimitedList} and L{oneOf} - - find more useful common expressions in the L{pyparsing_common} namespace class -""" - -__version__ = "2.2.1" -__versionTime__ = "18 Sep 2018 00:49 UTC" -__author__ = "Paul McGuire " - -import string -from weakref import ref as wkref -import copy -import sys -import warnings -import re -import sre_constants -import collections -import pprint -import traceback -import types -from datetime import datetime - -try: - from _thread import RLock -except ImportError: - from threading import RLock - -try: - # Python 3 - from collections.abc import Iterable - from collections.abc import MutableMapping -except ImportError: - # Python 2.7 - from collections import Iterable - from collections import MutableMapping - -try: - from collections import OrderedDict as _OrderedDict -except ImportError: - try: - from ordereddict import OrderedDict as _OrderedDict - except ImportError: - _OrderedDict = None - -#~ sys.stderr.write( "testing pyparsing module, version %s, %s\n" % (__version__,__versionTime__ ) ) - -__all__ = [ -'And', 'CaselessKeyword', 'CaselessLiteral', 'CharsNotIn', 'Combine', 'Dict', 'Each', 'Empty', -'FollowedBy', 'Forward', 'GoToColumn', 'Group', 'Keyword', 'LineEnd', 'LineStart', 'Literal', -'MatchFirst', 'NoMatch', 'NotAny', 'OneOrMore', 'OnlyOnce', 'Optional', 'Or', -'ParseBaseException', 'ParseElementEnhance', 'ParseException', 'ParseExpression', 'ParseFatalException', -'ParseResults', 'ParseSyntaxException', 'ParserElement', 'QuotedString', 'RecursiveGrammarException', -'Regex', 'SkipTo', 'StringEnd', 'StringStart', 'Suppress', 'Token', 'TokenConverter', -'White', 'Word', 'WordEnd', 'WordStart', 'ZeroOrMore', -'alphanums', 'alphas', 'alphas8bit', 'anyCloseTag', 'anyOpenTag', 'cStyleComment', 'col', -'commaSeparatedList', 'commonHTMLEntity', 'countedArray', 'cppStyleComment', 'dblQuotedString', -'dblSlashComment', 'delimitedList', 'dictOf', 'downcaseTokens', 'empty', 'hexnums', -'htmlComment', 'javaStyleComment', 'line', 'lineEnd', 'lineStart', 'lineno', -'makeHTMLTags', 'makeXMLTags', 'matchOnlyAtCol', 'matchPreviousExpr', 'matchPreviousLiteral', -'nestedExpr', 'nullDebugAction', 'nums', 'oneOf', 'opAssoc', 'operatorPrecedence', 'printables', -'punc8bit', 'pythonStyleComment', 'quotedString', 'removeQuotes', 'replaceHTMLEntity', -'replaceWith', 'restOfLine', 'sglQuotedString', 'srange', 'stringEnd', -'stringStart', 'traceParseAction', 'unicodeString', 'upcaseTokens', 'withAttribute', -'indentedBlock', 'originalTextFor', 'ungroup', 'infixNotation','locatedExpr', 'withClass', -'CloseMatch', 'tokenMap', 'pyparsing_common', -] - -system_version = tuple(sys.version_info)[:3] -PY_3 = system_version[0] == 3 -if PY_3: - _MAX_INT = sys.maxsize - basestring = str - unichr = chr - _ustr = str - - # build list of single arg builtins, that can be used as parse actions - singleArgBuiltins = [sum, len, sorted, reversed, list, tuple, set, any, all, min, max] - -else: - _MAX_INT = sys.maxint - range = xrange - - def _ustr(obj): - """Drop-in replacement for str(obj) that tries to be Unicode friendly. It first tries - str(obj). If that fails with a UnicodeEncodeError, then it tries unicode(obj). It - then < returns the unicode object | encodes it with the default encoding | ... >. - """ - if isinstance(obj,unicode): - return obj - - try: - # If this works, then _ustr(obj) has the same behaviour as str(obj), so - # it won't break any existing code. - return str(obj) - - except UnicodeEncodeError: - # Else encode it - ret = unicode(obj).encode(sys.getdefaultencoding(), 'xmlcharrefreplace') - xmlcharref = Regex(r'&#\d+;') - xmlcharref.setParseAction(lambda t: '\\u' + hex(int(t[0][2:-1]))[2:]) - return xmlcharref.transformString(ret) - - # build list of single arg builtins, tolerant of Python version, that can be used as parse actions - singleArgBuiltins = [] - import __builtin__ - for fname in "sum len sorted reversed list tuple set any all min max".split(): - try: - singleArgBuiltins.append(getattr(__builtin__,fname)) - except AttributeError: - continue - -_generatorType = type((y for y in range(1))) - -def _xml_escape(data): - """Escape &, <, >, ", ', etc. in a string of data.""" - - # ampersand must be replaced first - from_symbols = '&><"\'' - to_symbols = ('&'+s+';' for s in "amp gt lt quot apos".split()) - for from_,to_ in zip(from_symbols, to_symbols): - data = data.replace(from_, to_) - return data - -class _Constants(object): - pass - -alphas = string.ascii_uppercase + string.ascii_lowercase -nums = "0123456789" -hexnums = nums + "ABCDEFabcdef" -alphanums = alphas + nums -_bslash = chr(92) -printables = "".join(c for c in string.printable if c not in string.whitespace) - -class ParseBaseException(Exception): - """base exception class for all parsing runtime exceptions""" - # Performance tuning: we construct a *lot* of these, so keep this - # constructor as small and fast as possible - def __init__( self, pstr, loc=0, msg=None, elem=None ): - self.loc = loc - if msg is None: - self.msg = pstr - self.pstr = "" - else: - self.msg = msg - self.pstr = pstr - self.parserElement = elem - self.args = (pstr, loc, msg) - - @classmethod - def _from_exception(cls, pe): - """ - internal factory method to simplify creating one type of ParseException - from another - avoids having __init__ signature conflicts among subclasses - """ - return cls(pe.pstr, pe.loc, pe.msg, pe.parserElement) - - def __getattr__( self, aname ): - """supported attributes by name are: - - lineno - returns the line number of the exception text - - col - returns the column number of the exception text - - line - returns the line containing the exception text - """ - if( aname == "lineno" ): - return lineno( self.loc, self.pstr ) - elif( aname in ("col", "column") ): - return col( self.loc, self.pstr ) - elif( aname == "line" ): - return line( self.loc, self.pstr ) - else: - raise AttributeError(aname) - - def __str__( self ): - return "%s (at char %d), (line:%d, col:%d)" % \ - ( self.msg, self.loc, self.lineno, self.column ) - def __repr__( self ): - return _ustr(self) - def markInputline( self, markerString = ">!<" ): - """Extracts the exception line from the input string, and marks - the location of the exception with a special symbol. - """ - line_str = self.line - line_column = self.column - 1 - if markerString: - line_str = "".join((line_str[:line_column], - markerString, line_str[line_column:])) - return line_str.strip() - def __dir__(self): - return "lineno col line".split() + dir(type(self)) - -class ParseException(ParseBaseException): - """ - Exception thrown when parse expressions don't match class; - supported attributes by name are: - - lineno - returns the line number of the exception text - - col - returns the column number of the exception text - - line - returns the line containing the exception text - - Example:: - try: - Word(nums).setName("integer").parseString("ABC") - except ParseException as pe: - print(pe) - print("column: {}".format(pe.col)) - - prints:: - Expected integer (at char 0), (line:1, col:1) - column: 1 - """ - pass - -class ParseFatalException(ParseBaseException): - """user-throwable exception thrown when inconsistent parse content - is found; stops all parsing immediately""" - pass - -class ParseSyntaxException(ParseFatalException): - """just like L{ParseFatalException}, but thrown internally when an - L{ErrorStop} ('-' operator) indicates that parsing is to stop - immediately because an unbacktrackable syntax error has been found""" - pass - -#~ class ReparseException(ParseBaseException): - #~ """Experimental class - parse actions can raise this exception to cause - #~ pyparsing to reparse the input string: - #~ - with a modified input string, and/or - #~ - with a modified start location - #~ Set the values of the ReparseException in the constructor, and raise the - #~ exception in a parse action to cause pyparsing to use the new string/location. - #~ Setting the values as None causes no change to be made. - #~ """ - #~ def __init_( self, newstring, restartLoc ): - #~ self.newParseText = newstring - #~ self.reparseLoc = restartLoc - -class RecursiveGrammarException(Exception): - """exception thrown by L{ParserElement.validate} if the grammar could be improperly recursive""" - def __init__( self, parseElementList ): - self.parseElementTrace = parseElementList - - def __str__( self ): - return "RecursiveGrammarException: %s" % self.parseElementTrace - -class _ParseResultsWithOffset(object): - def __init__(self,p1,p2): - self.tup = (p1,p2) - def __getitem__(self,i): - return self.tup[i] - def __repr__(self): - return repr(self.tup[0]) - def setOffset(self,i): - self.tup = (self.tup[0],i) - -class ParseResults(object): - """ - Structured parse results, to provide multiple means of access to the parsed data: - - as a list (C{len(results)}) - - by list index (C{results[0], results[1]}, etc.) - - by attribute (C{results.} - see L{ParserElement.setResultsName}) - - Example:: - integer = Word(nums) - date_str = (integer.setResultsName("year") + '/' - + integer.setResultsName("month") + '/' - + integer.setResultsName("day")) - # equivalent form: - # date_str = integer("year") + '/' + integer("month") + '/' + integer("day") - - # parseString returns a ParseResults object - result = date_str.parseString("1999/12/31") - - def test(s, fn=repr): - print("%s -> %s" % (s, fn(eval(s)))) - test("list(result)") - test("result[0]") - test("result['month']") - test("result.day") - test("'month' in result") - test("'minutes' in result") - test("result.dump()", str) - prints:: - list(result) -> ['1999', '/', '12', '/', '31'] - result[0] -> '1999' - result['month'] -> '12' - result.day -> '31' - 'month' in result -> True - 'minutes' in result -> False - result.dump() -> ['1999', '/', '12', '/', '31'] - - day: 31 - - month: 12 - - year: 1999 - """ - def __new__(cls, toklist=None, name=None, asList=True, modal=True ): - if isinstance(toklist, cls): - return toklist - retobj = object.__new__(cls) - retobj.__doinit = True - return retobj - - # Performance tuning: we construct a *lot* of these, so keep this - # constructor as small and fast as possible - def __init__( self, toklist=None, name=None, asList=True, modal=True, isinstance=isinstance ): - if self.__doinit: - self.__doinit = False - self.__name = None - self.__parent = None - self.__accumNames = {} - self.__asList = asList - self.__modal = modal - if toklist is None: - toklist = [] - if isinstance(toklist, list): - self.__toklist = toklist[:] - elif isinstance(toklist, _generatorType): - self.__toklist = list(toklist) - else: - self.__toklist = [toklist] - self.__tokdict = dict() - - if name is not None and name: - if not modal: - self.__accumNames[name] = 0 - if isinstance(name,int): - name = _ustr(name) # will always return a str, but use _ustr for consistency - self.__name = name - if not (isinstance(toklist, (type(None), basestring, list)) and toklist in (None,'',[])): - if isinstance(toklist,basestring): - toklist = [ toklist ] - if asList: - if isinstance(toklist,ParseResults): - self[name] = _ParseResultsWithOffset(toklist.copy(),0) - else: - self[name] = _ParseResultsWithOffset(ParseResults(toklist[0]),0) - self[name].__name = name - else: - try: - self[name] = toklist[0] - except (KeyError,TypeError,IndexError): - self[name] = toklist - - def __getitem__( self, i ): - if isinstance( i, (int,slice) ): - return self.__toklist[i] - else: - if i not in self.__accumNames: - return self.__tokdict[i][-1][0] - else: - return ParseResults([ v[0] for v in self.__tokdict[i] ]) - - def __setitem__( self, k, v, isinstance=isinstance ): - if isinstance(v,_ParseResultsWithOffset): - self.__tokdict[k] = self.__tokdict.get(k,list()) + [v] - sub = v[0] - elif isinstance(k,(int,slice)): - self.__toklist[k] = v - sub = v - else: - self.__tokdict[k] = self.__tokdict.get(k,list()) + [_ParseResultsWithOffset(v,0)] - sub = v - if isinstance(sub,ParseResults): - sub.__parent = wkref(self) - - def __delitem__( self, i ): - if isinstance(i,(int,slice)): - mylen = len( self.__toklist ) - del self.__toklist[i] - - # convert int to slice - if isinstance(i, int): - if i < 0: - i += mylen - i = slice(i, i+1) - # get removed indices - removed = list(range(*i.indices(mylen))) - removed.reverse() - # fixup indices in token dictionary - for name,occurrences in self.__tokdict.items(): - for j in removed: - for k, (value, position) in enumerate(occurrences): - occurrences[k] = _ParseResultsWithOffset(value, position - (position > j)) - else: - del self.__tokdict[i] - - def __contains__( self, k ): - return k in self.__tokdict - - def __len__( self ): return len( self.__toklist ) - def __bool__(self): return ( not not self.__toklist ) - __nonzero__ = __bool__ - def __iter__( self ): return iter( self.__toklist ) - def __reversed__( self ): return iter( self.__toklist[::-1] ) - def _iterkeys( self ): - if hasattr(self.__tokdict, "iterkeys"): - return self.__tokdict.iterkeys() - else: - return iter(self.__tokdict) - - def _itervalues( self ): - return (self[k] for k in self._iterkeys()) - - def _iteritems( self ): - return ((k, self[k]) for k in self._iterkeys()) - - if PY_3: - keys = _iterkeys - """Returns an iterator of all named result keys (Python 3.x only).""" - - values = _itervalues - """Returns an iterator of all named result values (Python 3.x only).""" - - items = _iteritems - """Returns an iterator of all named result key-value tuples (Python 3.x only).""" - - else: - iterkeys = _iterkeys - """Returns an iterator of all named result keys (Python 2.x only).""" - - itervalues = _itervalues - """Returns an iterator of all named result values (Python 2.x only).""" - - iteritems = _iteritems - """Returns an iterator of all named result key-value tuples (Python 2.x only).""" - - def keys( self ): - """Returns all named result keys (as a list in Python 2.x, as an iterator in Python 3.x).""" - return list(self.iterkeys()) - - def values( self ): - """Returns all named result values (as a list in Python 2.x, as an iterator in Python 3.x).""" - return list(self.itervalues()) - - def items( self ): - """Returns all named result key-values (as a list of tuples in Python 2.x, as an iterator in Python 3.x).""" - return list(self.iteritems()) - - def haskeys( self ): - """Since keys() returns an iterator, this method is helpful in bypassing - code that looks for the existence of any defined results names.""" - return bool(self.__tokdict) - - def pop( self, *args, **kwargs): - """ - Removes and returns item at specified index (default=C{last}). - Supports both C{list} and C{dict} semantics for C{pop()}. If passed no - argument or an integer argument, it will use C{list} semantics - and pop tokens from the list of parsed tokens. If passed a - non-integer argument (most likely a string), it will use C{dict} - semantics and pop the corresponding value from any defined - results names. A second default return value argument is - supported, just as in C{dict.pop()}. - - Example:: - def remove_first(tokens): - tokens.pop(0) - print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321'] - print(OneOrMore(Word(nums)).addParseAction(remove_first).parseString("0 123 321")) # -> ['123', '321'] - - label = Word(alphas) - patt = label("LABEL") + OneOrMore(Word(nums)) - print(patt.parseString("AAB 123 321").dump()) - - # Use pop() in a parse action to remove named result (note that corresponding value is not - # removed from list form of results) - def remove_LABEL(tokens): - tokens.pop("LABEL") - return tokens - patt.addParseAction(remove_LABEL) - print(patt.parseString("AAB 123 321").dump()) - prints:: - ['AAB', '123', '321'] - - LABEL: AAB - - ['AAB', '123', '321'] - """ - if not args: - args = [-1] - for k,v in kwargs.items(): - if k == 'default': - args = (args[0], v) - else: - raise TypeError("pop() got an unexpected keyword argument '%s'" % k) - if (isinstance(args[0], int) or - len(args) == 1 or - args[0] in self): - index = args[0] - ret = self[index] - del self[index] - return ret - else: - defaultvalue = args[1] - return defaultvalue - - def get(self, key, defaultValue=None): - """ - Returns named result matching the given key, or if there is no - such name, then returns the given C{defaultValue} or C{None} if no - C{defaultValue} is specified. - - Similar to C{dict.get()}. - - Example:: - integer = Word(nums) - date_str = integer("year") + '/' + integer("month") + '/' + integer("day") - - result = date_str.parseString("1999/12/31") - print(result.get("year")) # -> '1999' - print(result.get("hour", "not specified")) # -> 'not specified' - print(result.get("hour")) # -> None - """ - if key in self: - return self[key] - else: - return defaultValue - - def insert( self, index, insStr ): - """ - Inserts new element at location index in the list of parsed tokens. - - Similar to C{list.insert()}. - - Example:: - print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321'] - - # use a parse action to insert the parse location in the front of the parsed results - def insert_locn(locn, tokens): - tokens.insert(0, locn) - print(OneOrMore(Word(nums)).addParseAction(insert_locn).parseString("0 123 321")) # -> [0, '0', '123', '321'] - """ - self.__toklist.insert(index, insStr) - # fixup indices in token dictionary - for name,occurrences in self.__tokdict.items(): - for k, (value, position) in enumerate(occurrences): - occurrences[k] = _ParseResultsWithOffset(value, position + (position > index)) - - def append( self, item ): - """ - Add single element to end of ParseResults list of elements. - - Example:: - print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321'] - - # use a parse action to compute the sum of the parsed integers, and add it to the end - def append_sum(tokens): - tokens.append(sum(map(int, tokens))) - print(OneOrMore(Word(nums)).addParseAction(append_sum).parseString("0 123 321")) # -> ['0', '123', '321', 444] - """ - self.__toklist.append(item) - - def extend( self, itemseq ): - """ - Add sequence of elements to end of ParseResults list of elements. - - Example:: - patt = OneOrMore(Word(alphas)) - - # use a parse action to append the reverse of the matched strings, to make a palindrome - def make_palindrome(tokens): - tokens.extend(reversed([t[::-1] for t in tokens])) - return ''.join(tokens) - print(patt.addParseAction(make_palindrome).parseString("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl' - """ - if isinstance(itemseq, ParseResults): - self += itemseq - else: - self.__toklist.extend(itemseq) - - def clear( self ): - """ - Clear all elements and results names. - """ - del self.__toklist[:] - self.__tokdict.clear() - - def __getattr__( self, name ): - try: - return self[name] - except KeyError: - return "" - - if name in self.__tokdict: - if name not in self.__accumNames: - return self.__tokdict[name][-1][0] - else: - return ParseResults([ v[0] for v in self.__tokdict[name] ]) - else: - return "" - - def __add__( self, other ): - ret = self.copy() - ret += other - return ret - - def __iadd__( self, other ): - if other.__tokdict: - offset = len(self.__toklist) - addoffset = lambda a: offset if a<0 else a+offset - otheritems = other.__tokdict.items() - otherdictitems = [(k, _ParseResultsWithOffset(v[0],addoffset(v[1])) ) - for (k,vlist) in otheritems for v in vlist] - for k,v in otherdictitems: - self[k] = v - if isinstance(v[0],ParseResults): - v[0].__parent = wkref(self) - - self.__toklist += other.__toklist - self.__accumNames.update( other.__accumNames ) - return self - - def __radd__(self, other): - if isinstance(other,int) and other == 0: - # useful for merging many ParseResults using sum() builtin - return self.copy() - else: - # this may raise a TypeError - so be it - return other + self - - def __repr__( self ): - return "(%s, %s)" % ( repr( self.__toklist ), repr( self.__tokdict ) ) - - def __str__( self ): - return '[' + ', '.join(_ustr(i) if isinstance(i, ParseResults) else repr(i) for i in self.__toklist) + ']' - - def _asStringList( self, sep='' ): - out = [] - for item in self.__toklist: - if out and sep: - out.append(sep) - if isinstance( item, ParseResults ): - out += item._asStringList() - else: - out.append( _ustr(item) ) - return out - - def asList( self ): - """ - Returns the parse results as a nested list of matching tokens, all converted to strings. - - Example:: - patt = OneOrMore(Word(alphas)) - result = patt.parseString("sldkj lsdkj sldkj") - # even though the result prints in string-like form, it is actually a pyparsing ParseResults - print(type(result), result) # -> ['sldkj', 'lsdkj', 'sldkj'] - - # Use asList() to create an actual list - result_list = result.asList() - print(type(result_list), result_list) # -> ['sldkj', 'lsdkj', 'sldkj'] - """ - return [res.asList() if isinstance(res,ParseResults) else res for res in self.__toklist] - - def asDict( self ): - """ - Returns the named parse results as a nested dictionary. - - Example:: - integer = Word(nums) - date_str = integer("year") + '/' + integer("month") + '/' + integer("day") - - result = date_str.parseString('12/31/1999') - print(type(result), repr(result)) # -> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]}) - - result_dict = result.asDict() - print(type(result_dict), repr(result_dict)) # -> {'day': '1999', 'year': '12', 'month': '31'} - - # even though a ParseResults supports dict-like access, sometime you just need to have a dict - import json - print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable - print(json.dumps(result.asDict())) # -> {"month": "31", "day": "1999", "year": "12"} - """ - if PY_3: - item_fn = self.items - else: - item_fn = self.iteritems - - def toItem(obj): - if isinstance(obj, ParseResults): - if obj.haskeys(): - return obj.asDict() - else: - return [toItem(v) for v in obj] - else: - return obj - - return dict((k,toItem(v)) for k,v in item_fn()) - - def copy( self ): - """ - Returns a new copy of a C{ParseResults} object. - """ - ret = ParseResults( self.__toklist ) - ret.__tokdict = self.__tokdict.copy() - ret.__parent = self.__parent - ret.__accumNames.update( self.__accumNames ) - ret.__name = self.__name - return ret - - def asXML( self, doctag=None, namedItemsOnly=False, indent="", formatted=True ): - """ - (Deprecated) Returns the parse results as XML. Tags are created for tokens and lists that have defined results names. - """ - nl = "\n" - out = [] - namedItems = dict((v[1],k) for (k,vlist) in self.__tokdict.items() - for v in vlist) - nextLevelIndent = indent + " " - - # collapse out indents if formatting is not desired - if not formatted: - indent = "" - nextLevelIndent = "" - nl = "" - - selfTag = None - if doctag is not None: - selfTag = doctag - else: - if self.__name: - selfTag = self.__name - - if not selfTag: - if namedItemsOnly: - return "" - else: - selfTag = "ITEM" - - out += [ nl, indent, "<", selfTag, ">" ] - - for i,res in enumerate(self.__toklist): - if isinstance(res,ParseResults): - if i in namedItems: - out += [ res.asXML(namedItems[i], - namedItemsOnly and doctag is None, - nextLevelIndent, - formatted)] - else: - out += [ res.asXML(None, - namedItemsOnly and doctag is None, - nextLevelIndent, - formatted)] - else: - # individual token, see if there is a name for it - resTag = None - if i in namedItems: - resTag = namedItems[i] - if not resTag: - if namedItemsOnly: - continue - else: - resTag = "ITEM" - xmlBodyText = _xml_escape(_ustr(res)) - out += [ nl, nextLevelIndent, "<", resTag, ">", - xmlBodyText, - "" ] - - out += [ nl, indent, "" ] - return "".join(out) - - def __lookup(self,sub): - for k,vlist in self.__tokdict.items(): - for v,loc in vlist: - if sub is v: - return k - return None - - def getName(self): - r""" - Returns the results name for this token expression. Useful when several - different expressions might match at a particular location. - - Example:: - integer = Word(nums) - ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d") - house_number_expr = Suppress('#') + Word(nums, alphanums) - user_data = (Group(house_number_expr)("house_number") - | Group(ssn_expr)("ssn") - | Group(integer)("age")) - user_info = OneOrMore(user_data) - - result = user_info.parseString("22 111-22-3333 #221B") - for item in result: - print(item.getName(), ':', item[0]) - prints:: - age : 22 - ssn : 111-22-3333 - house_number : 221B - """ - if self.__name: - return self.__name - elif self.__parent: - par = self.__parent() - if par: - return par.__lookup(self) - else: - return None - elif (len(self) == 1 and - len(self.__tokdict) == 1 and - next(iter(self.__tokdict.values()))[0][1] in (0,-1)): - return next(iter(self.__tokdict.keys())) - else: - return None - - def dump(self, indent='', depth=0, full=True): - """ - Diagnostic method for listing out the contents of a C{ParseResults}. - Accepts an optional C{indent} argument so that this string can be embedded - in a nested display of other data. - - Example:: - integer = Word(nums) - date_str = integer("year") + '/' + integer("month") + '/' + integer("day") - - result = date_str.parseString('12/31/1999') - print(result.dump()) - prints:: - ['12', '/', '31', '/', '1999'] - - day: 1999 - - month: 31 - - year: 12 - """ - out = [] - NL = '\n' - out.append( indent+_ustr(self.asList()) ) - if full: - if self.haskeys(): - items = sorted((str(k), v) for k,v in self.items()) - for k,v in items: - if out: - out.append(NL) - out.append( "%s%s- %s: " % (indent,(' '*depth), k) ) - if isinstance(v,ParseResults): - if v: - out.append( v.dump(indent,depth+1) ) - else: - out.append(_ustr(v)) - else: - out.append(repr(v)) - elif any(isinstance(vv,ParseResults) for vv in self): - v = self - for i,vv in enumerate(v): - if isinstance(vv,ParseResults): - out.append("\n%s%s[%d]:\n%s%s%s" % (indent,(' '*(depth)),i,indent,(' '*(depth+1)),vv.dump(indent,depth+1) )) - else: - out.append("\n%s%s[%d]:\n%s%s%s" % (indent,(' '*(depth)),i,indent,(' '*(depth+1)),_ustr(vv))) - - return "".join(out) - - def pprint(self, *args, **kwargs): - """ - Pretty-printer for parsed results as a list, using the C{pprint} module. - Accepts additional positional or keyword args as defined for the - C{pprint.pprint} method. (U{http://docs.python.org/3/library/pprint.html#pprint.pprint}) - - Example:: - ident = Word(alphas, alphanums) - num = Word(nums) - func = Forward() - term = ident | num | Group('(' + func + ')') - func <<= ident + Group(Optional(delimitedList(term))) - result = func.parseString("fna a,b,(fnb c,d,200),100") - result.pprint(width=40) - prints:: - ['fna', - ['a', - 'b', - ['(', 'fnb', ['c', 'd', '200'], ')'], - '100']] - """ - pprint.pprint(self.asList(), *args, **kwargs) - - # add support for pickle protocol - def __getstate__(self): - return ( self.__toklist, - ( self.__tokdict.copy(), - self.__parent is not None and self.__parent() or None, - self.__accumNames, - self.__name ) ) - - def __setstate__(self,state): - self.__toklist = state[0] - (self.__tokdict, - par, - inAccumNames, - self.__name) = state[1] - self.__accumNames = {} - self.__accumNames.update(inAccumNames) - if par is not None: - self.__parent = wkref(par) - else: - self.__parent = None - - def __getnewargs__(self): - return self.__toklist, self.__name, self.__asList, self.__modal - - def __dir__(self): - return (dir(type(self)) + list(self.keys())) - -MutableMapping.register(ParseResults) - -def col (loc,strg): - """Returns current column within a string, counting newlines as line separators. - The first column is number 1. - - Note: the default parsing behavior is to expand tabs in the input string - before starting the parsing process. See L{I{ParserElement.parseString}} for more information - on parsing strings containing C{}s, and suggested methods to maintain a - consistent view of the parsed string, the parse location, and line and column - positions within the parsed string. - """ - s = strg - return 1 if 0} for more information - on parsing strings containing C{}s, and suggested methods to maintain a - consistent view of the parsed string, the parse location, and line and column - positions within the parsed string. - """ - return strg.count("\n",0,loc) + 1 - -def line( loc, strg ): - """Returns the line of text containing loc within a string, counting newlines as line separators. - """ - lastCR = strg.rfind("\n", 0, loc) - nextCR = strg.find("\n", loc) - if nextCR >= 0: - return strg[lastCR+1:nextCR] - else: - return strg[lastCR+1:] - -def _defaultStartDebugAction( instring, loc, expr ): - print (("Match " + _ustr(expr) + " at loc " + _ustr(loc) + "(%d,%d)" % ( lineno(loc,instring), col(loc,instring) ))) - -def _defaultSuccessDebugAction( instring, startloc, endloc, expr, toks ): - print ("Matched " + _ustr(expr) + " -> " + str(toks.asList())) - -def _defaultExceptionDebugAction( instring, loc, expr, exc ): - print ("Exception raised:" + _ustr(exc)) - -def nullDebugAction(*args): - """'Do-nothing' debug action, to suppress debugging output during parsing.""" - pass - -# Only works on Python 3.x - nonlocal is toxic to Python 2 installs -#~ 'decorator to trim function calls to match the arity of the target' -#~ def _trim_arity(func, maxargs=3): - #~ if func in singleArgBuiltins: - #~ return lambda s,l,t: func(t) - #~ limit = 0 - #~ foundArity = False - #~ def wrapper(*args): - #~ nonlocal limit,foundArity - #~ while 1: - #~ try: - #~ ret = func(*args[limit:]) - #~ foundArity = True - #~ return ret - #~ except TypeError: - #~ if limit == maxargs or foundArity: - #~ raise - #~ limit += 1 - #~ continue - #~ return wrapper - -# this version is Python 2.x-3.x cross-compatible -'decorator to trim function calls to match the arity of the target' -def _trim_arity(func, maxargs=2): - if func in singleArgBuiltins: - return lambda s,l,t: func(t) - limit = [0] - foundArity = [False] - - # traceback return data structure changed in Py3.5 - normalize back to plain tuples - if system_version[:2] >= (3,5): - def extract_stack(limit=0): - # special handling for Python 3.5.0 - extra deep call stack by 1 - offset = -3 if system_version == (3,5,0) else -2 - frame_summary = traceback.extract_stack(limit=-offset+limit-1)[offset] - return [frame_summary[:2]] - def extract_tb(tb, limit=0): - frames = traceback.extract_tb(tb, limit=limit) - frame_summary = frames[-1] - return [frame_summary[:2]] - else: - extract_stack = traceback.extract_stack - extract_tb = traceback.extract_tb - - # synthesize what would be returned by traceback.extract_stack at the call to - # user's parse action 'func', so that we don't incur call penalty at parse time - - LINE_DIFF = 6 - # IF ANY CODE CHANGES, EVEN JUST COMMENTS OR BLANK LINES, BETWEEN THE NEXT LINE AND - # THE CALL TO FUNC INSIDE WRAPPER, LINE_DIFF MUST BE MODIFIED!!!! - this_line = extract_stack(limit=2)[-1] - pa_call_line_synth = (this_line[0], this_line[1]+LINE_DIFF) - - def wrapper(*args): - while 1: - try: - ret = func(*args[limit[0]:]) - foundArity[0] = True - return ret - except TypeError: - # re-raise TypeErrors if they did not come from our arity testing - if foundArity[0]: - raise - else: - try: - tb = sys.exc_info()[-1] - if not extract_tb(tb, limit=2)[-1][:2] == pa_call_line_synth: - raise - finally: - del tb - - if limit[0] <= maxargs: - limit[0] += 1 - continue - raise - - # copy func name to wrapper for sensible debug output - func_name = "" - try: - func_name = getattr(func, '__name__', - getattr(func, '__class__').__name__) - except Exception: - func_name = str(func) - wrapper.__name__ = func_name - - return wrapper - -class ParserElement(object): - """Abstract base level parser element class.""" - DEFAULT_WHITE_CHARS = " \n\t\r" - verbose_stacktrace = False - - @staticmethod - def setDefaultWhitespaceChars( chars ): - r""" - Overrides the default whitespace chars - - Example:: - # default whitespace chars are space, and newline - OneOrMore(Word(alphas)).parseString("abc def\nghi jkl") # -> ['abc', 'def', 'ghi', 'jkl'] - - # change to just treat newline as significant - ParserElement.setDefaultWhitespaceChars(" \t") - OneOrMore(Word(alphas)).parseString("abc def\nghi jkl") # -> ['abc', 'def'] - """ - ParserElement.DEFAULT_WHITE_CHARS = chars - - @staticmethod - def inlineLiteralsUsing(cls): - """ - Set class to be used for inclusion of string literals into a parser. - - Example:: - # default literal class used is Literal - integer = Word(nums) - date_str = integer("year") + '/' + integer("month") + '/' + integer("day") - - date_str.parseString("1999/12/31") # -> ['1999', '/', '12', '/', '31'] - - - # change to Suppress - ParserElement.inlineLiteralsUsing(Suppress) - date_str = integer("year") + '/' + integer("month") + '/' + integer("day") - - date_str.parseString("1999/12/31") # -> ['1999', '12', '31'] - """ - ParserElement._literalStringClass = cls - - def __init__( self, savelist=False ): - self.parseAction = list() - self.failAction = None - #~ self.name = "" # don't define self.name, let subclasses try/except upcall - self.strRepr = None - self.resultsName = None - self.saveAsList = savelist - self.skipWhitespace = True - self.whiteChars = ParserElement.DEFAULT_WHITE_CHARS - self.copyDefaultWhiteChars = True - self.mayReturnEmpty = False # used when checking for left-recursion - self.keepTabs = False - self.ignoreExprs = list() - self.debug = False - self.streamlined = False - self.mayIndexError = True # used to optimize exception handling for subclasses that don't advance parse index - self.errmsg = "" - self.modalResults = True # used to mark results names as modal (report only last) or cumulative (list all) - self.debugActions = ( None, None, None ) #custom debug actions - self.re = None - self.callPreparse = True # used to avoid redundant calls to preParse - self.callDuringTry = False - - def copy( self ): - """ - Make a copy of this C{ParserElement}. Useful for defining different parse actions - for the same parsing pattern, using copies of the original parse element. - - Example:: - integer = Word(nums).setParseAction(lambda toks: int(toks[0])) - integerK = integer.copy().addParseAction(lambda toks: toks[0]*1024) + Suppress("K") - integerM = integer.copy().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M") - - print(OneOrMore(integerK | integerM | integer).parseString("5K 100 640K 256M")) - prints:: - [5120, 100, 655360, 268435456] - Equivalent form of C{expr.copy()} is just C{expr()}:: - integerM = integer().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M") - """ - cpy = copy.copy( self ) - cpy.parseAction = self.parseAction[:] - cpy.ignoreExprs = self.ignoreExprs[:] - if self.copyDefaultWhiteChars: - cpy.whiteChars = ParserElement.DEFAULT_WHITE_CHARS - return cpy - - def setName( self, name ): - """ - Define name for this expression, makes debugging and exception messages clearer. - - Example:: - Word(nums).parseString("ABC") # -> Exception: Expected W:(0123...) (at char 0), (line:1, col:1) - Word(nums).setName("integer").parseString("ABC") # -> Exception: Expected integer (at char 0), (line:1, col:1) - """ - self.name = name - self.errmsg = "Expected " + self.name - if hasattr(self,"exception"): - self.exception.msg = self.errmsg - return self - - def setResultsName( self, name, listAllMatches=False ): - """ - Define name for referencing matching tokens as a nested attribute - of the returned parse results. - NOTE: this returns a *copy* of the original C{ParserElement} object; - this is so that the client can define a basic element, such as an - integer, and reference it in multiple places with different names. - - You can also set results names using the abbreviated syntax, - C{expr("name")} in place of C{expr.setResultsName("name")} - - see L{I{__call__}<__call__>}. - - Example:: - date_str = (integer.setResultsName("year") + '/' - + integer.setResultsName("month") + '/' - + integer.setResultsName("day")) - - # equivalent form: - date_str = integer("year") + '/' + integer("month") + '/' + integer("day") - """ - newself = self.copy() - if name.endswith("*"): - name = name[:-1] - listAllMatches=True - newself.resultsName = name - newself.modalResults = not listAllMatches - return newself - - def setBreak(self,breakFlag = True): - """Method to invoke the Python pdb debugger when this element is - about to be parsed. Set C{breakFlag} to True to enable, False to - disable. - """ - if breakFlag: - _parseMethod = self._parse - def breaker(instring, loc, doActions=True, callPreParse=True): - import pdb - pdb.set_trace() - return _parseMethod( instring, loc, doActions, callPreParse ) - breaker._originalParseMethod = _parseMethod - self._parse = breaker - else: - if hasattr(self._parse,"_originalParseMethod"): - self._parse = self._parse._originalParseMethod - return self - - def setParseAction( self, *fns, **kwargs ): - """ - Define one or more actions to perform when successfully matching parse element definition. - Parse action fn is a callable method with 0-3 arguments, called as C{fn(s,loc,toks)}, - C{fn(loc,toks)}, C{fn(toks)}, or just C{fn()}, where: - - s = the original string being parsed (see note below) - - loc = the location of the matching substring - - toks = a list of the matched tokens, packaged as a C{L{ParseResults}} object - If the functions in fns modify the tokens, they can return them as the return - value from fn, and the modified list of tokens will replace the original. - Otherwise, fn does not need to return any value. - - Optional keyword arguments: - - callDuringTry = (default=C{False}) indicate if parse action should be run during lookaheads and alternate testing - - Note: the default parsing behavior is to expand tabs in the input string - before starting the parsing process. See L{I{parseString}} for more information - on parsing strings containing C{}s, and suggested methods to maintain a - consistent view of the parsed string, the parse location, and line and column - positions within the parsed string. - - Example:: - integer = Word(nums) - date_str = integer + '/' + integer + '/' + integer - - date_str.parseString("1999/12/31") # -> ['1999', '/', '12', '/', '31'] - - # use parse action to convert to ints at parse time - integer = Word(nums).setParseAction(lambda toks: int(toks[0])) - date_str = integer + '/' + integer + '/' + integer - - # note that integer fields are now ints, not strings - date_str.parseString("1999/12/31") # -> [1999, '/', 12, '/', 31] - """ - self.parseAction = list(map(_trim_arity, list(fns))) - self.callDuringTry = kwargs.get("callDuringTry", False) - return self - - def addParseAction( self, *fns, **kwargs ): - """ - Add one or more parse actions to expression's list of parse actions. See L{I{setParseAction}}. - - See examples in L{I{copy}}. - """ - self.parseAction += list(map(_trim_arity, list(fns))) - self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False) - return self - - def addCondition(self, *fns, **kwargs): - """Add a boolean predicate function to expression's list of parse actions. See - L{I{setParseAction}} for function call signatures. Unlike C{setParseAction}, - functions passed to C{addCondition} need to return boolean success/fail of the condition. - - Optional keyword arguments: - - message = define a custom message to be used in the raised exception - - fatal = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise ParseException - - Example:: - integer = Word(nums).setParseAction(lambda toks: int(toks[0])) - year_int = integer.copy() - year_int.addCondition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later") - date_str = year_int + '/' + integer + '/' + integer - - result = date_str.parseString("1999/12/31") # -> Exception: Only support years 2000 and later (at char 0), (line:1, col:1) - """ - msg = kwargs.get("message", "failed user-defined condition") - exc_type = ParseFatalException if kwargs.get("fatal", False) else ParseException - for fn in fns: - def pa(s,l,t): - if not bool(_trim_arity(fn)(s,l,t)): - raise exc_type(s,l,msg) - self.parseAction.append(pa) - self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False) - return self - - def setFailAction( self, fn ): - """Define action to perform if parsing fails at this expression. - Fail acton fn is a callable function that takes the arguments - C{fn(s,loc,expr,err)} where: - - s = string being parsed - - loc = location where expression match was attempted and failed - - expr = the parse expression that failed - - err = the exception thrown - The function returns no value. It may throw C{L{ParseFatalException}} - if it is desired to stop parsing immediately.""" - self.failAction = fn - return self - - def _skipIgnorables( self, instring, loc ): - exprsFound = True - while exprsFound: - exprsFound = False - for e in self.ignoreExprs: - try: - while 1: - loc,dummy = e._parse( instring, loc ) - exprsFound = True - except ParseException: - pass - return loc - - def preParse( self, instring, loc ): - if self.ignoreExprs: - loc = self._skipIgnorables( instring, loc ) - - if self.skipWhitespace: - wt = self.whiteChars - instrlen = len(instring) - while loc < instrlen and instring[loc] in wt: - loc += 1 - - return loc - - def parseImpl( self, instring, loc, doActions=True ): - return loc, [] - - def postParse( self, instring, loc, tokenlist ): - return tokenlist - - #~ @profile - def _parseNoCache( self, instring, loc, doActions=True, callPreParse=True ): - debugging = ( self.debug ) #and doActions ) - - if debugging or self.failAction: - #~ print ("Match",self,"at loc",loc,"(%d,%d)" % ( lineno(loc,instring), col(loc,instring) )) - if (self.debugActions[0] ): - self.debugActions[0]( instring, loc, self ) - if callPreParse and self.callPreparse: - preloc = self.preParse( instring, loc ) - else: - preloc = loc - tokensStart = preloc - try: - try: - loc,tokens = self.parseImpl( instring, preloc, doActions ) - except IndexError: - raise ParseException( instring, len(instring), self.errmsg, self ) - except ParseBaseException as err: - #~ print ("Exception raised:", err) - if self.debugActions[2]: - self.debugActions[2]( instring, tokensStart, self, err ) - if self.failAction: - self.failAction( instring, tokensStart, self, err ) - raise - else: - if callPreParse and self.callPreparse: - preloc = self.preParse( instring, loc ) - else: - preloc = loc - tokensStart = preloc - if self.mayIndexError or preloc >= len(instring): - try: - loc,tokens = self.parseImpl( instring, preloc, doActions ) - except IndexError: - raise ParseException( instring, len(instring), self.errmsg, self ) - else: - loc,tokens = self.parseImpl( instring, preloc, doActions ) - - tokens = self.postParse( instring, loc, tokens ) - - retTokens = ParseResults( tokens, self.resultsName, asList=self.saveAsList, modal=self.modalResults ) - if self.parseAction and (doActions or self.callDuringTry): - if debugging: - try: - for fn in self.parseAction: - tokens = fn( instring, tokensStart, retTokens ) - if tokens is not None: - retTokens = ParseResults( tokens, - self.resultsName, - asList=self.saveAsList and isinstance(tokens,(ParseResults,list)), - modal=self.modalResults ) - except ParseBaseException as err: - #~ print "Exception raised in user parse action:", err - if (self.debugActions[2] ): - self.debugActions[2]( instring, tokensStart, self, err ) - raise - else: - for fn in self.parseAction: - tokens = fn( instring, tokensStart, retTokens ) - if tokens is not None: - retTokens = ParseResults( tokens, - self.resultsName, - asList=self.saveAsList and isinstance(tokens,(ParseResults,list)), - modal=self.modalResults ) - if debugging: - #~ print ("Matched",self,"->",retTokens.asList()) - if (self.debugActions[1] ): - self.debugActions[1]( instring, tokensStart, loc, self, retTokens ) - - return loc, retTokens - - def tryParse( self, instring, loc ): - try: - return self._parse( instring, loc, doActions=False )[0] - except ParseFatalException: - raise ParseException( instring, loc, self.errmsg, self) - - def canParseNext(self, instring, loc): - try: - self.tryParse(instring, loc) - except (ParseException, IndexError): - return False - else: - return True - - class _UnboundedCache(object): - def __init__(self): - cache = {} - self.not_in_cache = not_in_cache = object() - - def get(self, key): - return cache.get(key, not_in_cache) - - def set(self, key, value): - cache[key] = value - - def clear(self): - cache.clear() - - def cache_len(self): - return len(cache) - - self.get = types.MethodType(get, self) - self.set = types.MethodType(set, self) - self.clear = types.MethodType(clear, self) - self.__len__ = types.MethodType(cache_len, self) - - if _OrderedDict is not None: - class _FifoCache(object): - def __init__(self, size): - self.not_in_cache = not_in_cache = object() - - cache = _OrderedDict() - - def get(self, key): - return cache.get(key, not_in_cache) - - def set(self, key, value): - cache[key] = value - while len(cache) > size: - try: - cache.popitem(False) - except KeyError: - pass - - def clear(self): - cache.clear() - - def cache_len(self): - return len(cache) - - self.get = types.MethodType(get, self) - self.set = types.MethodType(set, self) - self.clear = types.MethodType(clear, self) - self.__len__ = types.MethodType(cache_len, self) - - else: - class _FifoCache(object): - def __init__(self, size): - self.not_in_cache = not_in_cache = object() - - cache = {} - key_fifo = collections.deque([], size) - - def get(self, key): - return cache.get(key, not_in_cache) - - def set(self, key, value): - cache[key] = value - while len(key_fifo) > size: - cache.pop(key_fifo.popleft(), None) - key_fifo.append(key) - - def clear(self): - cache.clear() - key_fifo.clear() - - def cache_len(self): - return len(cache) - - self.get = types.MethodType(get, self) - self.set = types.MethodType(set, self) - self.clear = types.MethodType(clear, self) - self.__len__ = types.MethodType(cache_len, self) - - # argument cache for optimizing repeated calls when backtracking through recursive expressions - packrat_cache = {} # this is set later by enabledPackrat(); this is here so that resetCache() doesn't fail - packrat_cache_lock = RLock() - packrat_cache_stats = [0, 0] - - # this method gets repeatedly called during backtracking with the same arguments - - # we can cache these arguments and save ourselves the trouble of re-parsing the contained expression - def _parseCache( self, instring, loc, doActions=True, callPreParse=True ): - HIT, MISS = 0, 1 - lookup = (self, instring, loc, callPreParse, doActions) - with ParserElement.packrat_cache_lock: - cache = ParserElement.packrat_cache - value = cache.get(lookup) - if value is cache.not_in_cache: - ParserElement.packrat_cache_stats[MISS] += 1 - try: - value = self._parseNoCache(instring, loc, doActions, callPreParse) - except ParseBaseException as pe: - # cache a copy of the exception, without the traceback - cache.set(lookup, pe.__class__(*pe.args)) - raise - else: - cache.set(lookup, (value[0], value[1].copy())) - return value - else: - ParserElement.packrat_cache_stats[HIT] += 1 - if isinstance(value, Exception): - raise value - return (value[0], value[1].copy()) - - _parse = _parseNoCache - - @staticmethod - def resetCache(): - ParserElement.packrat_cache.clear() - ParserElement.packrat_cache_stats[:] = [0] * len(ParserElement.packrat_cache_stats) - - _packratEnabled = False - @staticmethod - def enablePackrat(cache_size_limit=128): - """Enables "packrat" parsing, which adds memoizing to the parsing logic. - Repeated parse attempts at the same string location (which happens - often in many complex grammars) can immediately return a cached value, - instead of re-executing parsing/validating code. Memoizing is done of - both valid results and parsing exceptions. - - Parameters: - - cache_size_limit - (default=C{128}) - if an integer value is provided - will limit the size of the packrat cache; if None is passed, then - the cache size will be unbounded; if 0 is passed, the cache will - be effectively disabled. - - This speedup may break existing programs that use parse actions that - have side-effects. For this reason, packrat parsing is disabled when - you first import pyparsing. To activate the packrat feature, your - program must call the class method C{ParserElement.enablePackrat()}. If - your program uses C{psyco} to "compile as you go", you must call - C{enablePackrat} before calling C{psyco.full()}. If you do not do this, - Python will crash. For best results, call C{enablePackrat()} immediately - after importing pyparsing. - - Example:: - import pyparsing - pyparsing.ParserElement.enablePackrat() - """ - if not ParserElement._packratEnabled: - ParserElement._packratEnabled = True - if cache_size_limit is None: - ParserElement.packrat_cache = ParserElement._UnboundedCache() - else: - ParserElement.packrat_cache = ParserElement._FifoCache(cache_size_limit) - ParserElement._parse = ParserElement._parseCache - - def parseString( self, instring, parseAll=False ): - """ - Execute the parse expression with the given string. - This is the main interface to the client code, once the complete - expression has been built. - - If you want the grammar to require that the entire input string be - successfully parsed, then set C{parseAll} to True (equivalent to ending - the grammar with C{L{StringEnd()}}). - - Note: C{parseString} implicitly calls C{expandtabs()} on the input string, - in order to report proper column numbers in parse actions. - If the input string contains tabs and - the grammar uses parse actions that use the C{loc} argument to index into the - string being parsed, you can ensure you have a consistent view of the input - string by: - - calling C{parseWithTabs} on your grammar before calling C{parseString} - (see L{I{parseWithTabs}}) - - define your parse action using the full C{(s,loc,toks)} signature, and - reference the input string using the parse action's C{s} argument - - explictly expand the tabs in your input string before calling - C{parseString} - - Example:: - Word('a').parseString('aaaaabaaa') # -> ['aaaaa'] - Word('a').parseString('aaaaabaaa', parseAll=True) # -> Exception: Expected end of text - """ - ParserElement.resetCache() - if not self.streamlined: - self.streamline() - #~ self.saveAsList = True - for e in self.ignoreExprs: - e.streamline() - if not self.keepTabs: - instring = instring.expandtabs() - try: - loc, tokens = self._parse( instring, 0 ) - if parseAll: - loc = self.preParse( instring, loc ) - se = Empty() + StringEnd() - se._parse( instring, loc ) - except ParseBaseException as exc: - if ParserElement.verbose_stacktrace: - raise - else: - # catch and re-raise exception from here, clears out pyparsing internal stack trace - raise exc - else: - return tokens - - def scanString( self, instring, maxMatches=_MAX_INT, overlap=False ): - """ - Scan the input string for expression matches. Each match will return the - matching tokens, start location, and end location. May be called with optional - C{maxMatches} argument, to clip scanning after 'n' matches are found. If - C{overlap} is specified, then overlapping matches will be reported. - - Note that the start and end locations are reported relative to the string - being parsed. See L{I{parseString}} for more information on parsing - strings with embedded tabs. - - Example:: - source = "sldjf123lsdjjkf345sldkjf879lkjsfd987" - print(source) - for tokens,start,end in Word(alphas).scanString(source): - print(' '*start + '^'*(end-start)) - print(' '*start + tokens[0]) - - prints:: - - sldjf123lsdjjkf345sldkjf879lkjsfd987 - ^^^^^ - sldjf - ^^^^^^^ - lsdjjkf - ^^^^^^ - sldkjf - ^^^^^^ - lkjsfd - """ - if not self.streamlined: - self.streamline() - for e in self.ignoreExprs: - e.streamline() - - if not self.keepTabs: - instring = _ustr(instring).expandtabs() - instrlen = len(instring) - loc = 0 - preparseFn = self.preParse - parseFn = self._parse - ParserElement.resetCache() - matches = 0 - try: - while loc <= instrlen and matches < maxMatches: - try: - preloc = preparseFn( instring, loc ) - nextLoc,tokens = parseFn( instring, preloc, callPreParse=False ) - except ParseException: - loc = preloc+1 - else: - if nextLoc > loc: - matches += 1 - yield tokens, preloc, nextLoc - if overlap: - nextloc = preparseFn( instring, loc ) - if nextloc > loc: - loc = nextLoc - else: - loc += 1 - else: - loc = nextLoc - else: - loc = preloc+1 - except ParseBaseException as exc: - if ParserElement.verbose_stacktrace: - raise - else: - # catch and re-raise exception from here, clears out pyparsing internal stack trace - raise exc - - def transformString( self, instring ): - """ - Extension to C{L{scanString}}, to modify matching text with modified tokens that may - be returned from a parse action. To use C{transformString}, define a grammar and - attach a parse action to it that modifies the returned token list. - Invoking C{transformString()} on a target string will then scan for matches, - and replace the matched text patterns according to the logic in the parse - action. C{transformString()} returns the resulting transformed string. - - Example:: - wd = Word(alphas) - wd.setParseAction(lambda toks: toks[0].title()) - - print(wd.transformString("now is the winter of our discontent made glorious summer by this sun of york.")) - Prints:: - Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York. - """ - out = [] - lastE = 0 - # force preservation of s, to minimize unwanted transformation of string, and to - # keep string locs straight between transformString and scanString - self.keepTabs = True - try: - for t,s,e in self.scanString( instring ): - out.append( instring[lastE:s] ) - if t: - if isinstance(t,ParseResults): - out += t.asList() - elif isinstance(t,list): - out += t - else: - out.append(t) - lastE = e - out.append(instring[lastE:]) - out = [o for o in out if o] - return "".join(map(_ustr,_flatten(out))) - except ParseBaseException as exc: - if ParserElement.verbose_stacktrace: - raise - else: - # catch and re-raise exception from here, clears out pyparsing internal stack trace - raise exc - - def searchString( self, instring, maxMatches=_MAX_INT ): - """ - Another extension to C{L{scanString}}, simplifying the access to the tokens found - to match the given parse expression. May be called with optional - C{maxMatches} argument, to clip searching after 'n' matches are found. - - Example:: - # a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters - cap_word = Word(alphas.upper(), alphas.lower()) - - print(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity")) - - # the sum() builtin can be used to merge results into a single ParseResults object - print(sum(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity"))) - prints:: - [['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']] - ['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity'] - """ - try: - return ParseResults([ t for t,s,e in self.scanString( instring, maxMatches ) ]) - except ParseBaseException as exc: - if ParserElement.verbose_stacktrace: - raise - else: - # catch and re-raise exception from here, clears out pyparsing internal stack trace - raise exc - - def split(self, instring, maxsplit=_MAX_INT, includeSeparators=False): - """ - Generator method to split a string using the given expression as a separator. - May be called with optional C{maxsplit} argument, to limit the number of splits; - and the optional C{includeSeparators} argument (default=C{False}), if the separating - matching text should be included in the split results. - - Example:: - punc = oneOf(list(".,;:/-!?")) - print(list(punc.split("This, this?, this sentence, is badly punctuated!"))) - prints:: - ['This', ' this', '', ' this sentence', ' is badly punctuated', ''] - """ - splits = 0 - last = 0 - for t,s,e in self.scanString(instring, maxMatches=maxsplit): - yield instring[last:s] - if includeSeparators: - yield t[0] - last = e - yield instring[last:] - - def __add__(self, other ): - """ - Implementation of + operator - returns C{L{And}}. Adding strings to a ParserElement - converts them to L{Literal}s by default. - - Example:: - greet = Word(alphas) + "," + Word(alphas) + "!" - hello = "Hello, World!" - print (hello, "->", greet.parseString(hello)) - Prints:: - Hello, World! -> ['Hello', ',', 'World', '!'] - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return And( [ self, other ] ) - - def __radd__(self, other ): - """ - Implementation of + operator when left operand is not a C{L{ParserElement}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return other + self - - def __sub__(self, other): - """ - Implementation of - operator, returns C{L{And}} with error stop - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return self + And._ErrorStop() + other - - def __rsub__(self, other ): - """ - Implementation of - operator when left operand is not a C{L{ParserElement}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return other - self - - def __mul__(self,other): - """ - Implementation of * operator, allows use of C{expr * 3} in place of - C{expr + expr + expr}. Expressions may also me multiplied by a 2-integer - tuple, similar to C{{min,max}} multipliers in regular expressions. Tuples - may also include C{None} as in: - - C{expr*(n,None)} or C{expr*(n,)} is equivalent - to C{expr*n + L{ZeroOrMore}(expr)} - (read as "at least n instances of C{expr}") - - C{expr*(None,n)} is equivalent to C{expr*(0,n)} - (read as "0 to n instances of C{expr}") - - C{expr*(None,None)} is equivalent to C{L{ZeroOrMore}(expr)} - - C{expr*(1,None)} is equivalent to C{L{OneOrMore}(expr)} - - Note that C{expr*(None,n)} does not raise an exception if - more than n exprs exist in the input stream; that is, - C{expr*(None,n)} does not enforce a maximum number of expr - occurrences. If this behavior is desired, then write - C{expr*(None,n) + ~expr} - """ - if isinstance(other,int): - minElements, optElements = other,0 - elif isinstance(other,tuple): - other = (other + (None, None))[:2] - if other[0] is None: - other = (0, other[1]) - if isinstance(other[0],int) and other[1] is None: - if other[0] == 0: - return ZeroOrMore(self) - if other[0] == 1: - return OneOrMore(self) - else: - return self*other[0] + ZeroOrMore(self) - elif isinstance(other[0],int) and isinstance(other[1],int): - minElements, optElements = other - optElements -= minElements - else: - raise TypeError("cannot multiply 'ParserElement' and ('%s','%s') objects", type(other[0]),type(other[1])) - else: - raise TypeError("cannot multiply 'ParserElement' and '%s' objects", type(other)) - - if minElements < 0: - raise ValueError("cannot multiply ParserElement by negative value") - if optElements < 0: - raise ValueError("second tuple value must be greater or equal to first tuple value") - if minElements == optElements == 0: - raise ValueError("cannot multiply ParserElement by 0 or (0,0)") - - if (optElements): - def makeOptionalList(n): - if n>1: - return Optional(self + makeOptionalList(n-1)) - else: - return Optional(self) - if minElements: - if minElements == 1: - ret = self + makeOptionalList(optElements) - else: - ret = And([self]*minElements) + makeOptionalList(optElements) - else: - ret = makeOptionalList(optElements) - else: - if minElements == 1: - ret = self - else: - ret = And([self]*minElements) - return ret - - def __rmul__(self, other): - return self.__mul__(other) - - def __or__(self, other ): - """ - Implementation of | operator - returns C{L{MatchFirst}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return MatchFirst( [ self, other ] ) - - def __ror__(self, other ): - """ - Implementation of | operator when left operand is not a C{L{ParserElement}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return other | self - - def __xor__(self, other ): - """ - Implementation of ^ operator - returns C{L{Or}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return Or( [ self, other ] ) - - def __rxor__(self, other ): - """ - Implementation of ^ operator when left operand is not a C{L{ParserElement}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return other ^ self - - def __and__(self, other ): - """ - Implementation of & operator - returns C{L{Each}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return Each( [ self, other ] ) - - def __rand__(self, other ): - """ - Implementation of & operator when left operand is not a C{L{ParserElement}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return other & self - - def __invert__( self ): - """ - Implementation of ~ operator - returns C{L{NotAny}} - """ - return NotAny( self ) - - def __call__(self, name=None): - """ - Shortcut for C{L{setResultsName}}, with C{listAllMatches=False}. - - If C{name} is given with a trailing C{'*'} character, then C{listAllMatches} will be - passed as C{True}. - - If C{name} is omitted, same as calling C{L{copy}}. - - Example:: - # these are equivalent - userdata = Word(alphas).setResultsName("name") + Word(nums+"-").setResultsName("socsecno") - userdata = Word(alphas)("name") + Word(nums+"-")("socsecno") - """ - if name is not None: - return self.setResultsName(name) - else: - return self.copy() - - def suppress( self ): - """ - Suppresses the output of this C{ParserElement}; useful to keep punctuation from - cluttering up returned output. - """ - return Suppress( self ) - - def leaveWhitespace( self ): - """ - Disables the skipping of whitespace before matching the characters in the - C{ParserElement}'s defined pattern. This is normally only used internally by - the pyparsing module, but may be needed in some whitespace-sensitive grammars. - """ - self.skipWhitespace = False - return self - - def setWhitespaceChars( self, chars ): - """ - Overrides the default whitespace chars - """ - self.skipWhitespace = True - self.whiteChars = chars - self.copyDefaultWhiteChars = False - return self - - def parseWithTabs( self ): - """ - Overrides default behavior to expand C{}s to spaces before parsing the input string. - Must be called before C{parseString} when the input grammar contains elements that - match C{} characters. - """ - self.keepTabs = True - return self - - def ignore( self, other ): - """ - Define expression to be ignored (e.g., comments) while doing pattern - matching; may be called repeatedly, to define multiple comment or other - ignorable patterns. - - Example:: - patt = OneOrMore(Word(alphas)) - patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj'] - - patt.ignore(cStyleComment) - patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj', 'lskjd'] - """ - if isinstance(other, basestring): - other = Suppress(other) - - if isinstance( other, Suppress ): - if other not in self.ignoreExprs: - self.ignoreExprs.append(other) - else: - self.ignoreExprs.append( Suppress( other.copy() ) ) - return self - - def setDebugActions( self, startAction, successAction, exceptionAction ): - """ - Enable display of debugging messages while doing pattern matching. - """ - self.debugActions = (startAction or _defaultStartDebugAction, - successAction or _defaultSuccessDebugAction, - exceptionAction or _defaultExceptionDebugAction) - self.debug = True - return self - - def setDebug( self, flag=True ): - """ - Enable display of debugging messages while doing pattern matching. - Set C{flag} to True to enable, False to disable. - - Example:: - wd = Word(alphas).setName("alphaword") - integer = Word(nums).setName("numword") - term = wd | integer - - # turn on debugging for wd - wd.setDebug() - - OneOrMore(term).parseString("abc 123 xyz 890") - - prints:: - Match alphaword at loc 0(1,1) - Matched alphaword -> ['abc'] - Match alphaword at loc 3(1,4) - Exception raised:Expected alphaword (at char 4), (line:1, col:5) - Match alphaword at loc 7(1,8) - Matched alphaword -> ['xyz'] - Match alphaword at loc 11(1,12) - Exception raised:Expected alphaword (at char 12), (line:1, col:13) - Match alphaword at loc 15(1,16) - Exception raised:Expected alphaword (at char 15), (line:1, col:16) - - The output shown is that produced by the default debug actions - custom debug actions can be - specified using L{setDebugActions}. Prior to attempting - to match the C{wd} expression, the debugging message C{"Match at loc (,)"} - is shown. Then if the parse succeeds, a C{"Matched"} message is shown, or an C{"Exception raised"} - message is shown. Also note the use of L{setName} to assign a human-readable name to the expression, - which makes debugging and exception messages easier to understand - for instance, the default - name created for the C{Word} expression without calling C{setName} is C{"W:(ABCD...)"}. - """ - if flag: - self.setDebugActions( _defaultStartDebugAction, _defaultSuccessDebugAction, _defaultExceptionDebugAction ) - else: - self.debug = False - return self - - def __str__( self ): - return self.name - - def __repr__( self ): - return _ustr(self) - - def streamline( self ): - self.streamlined = True - self.strRepr = None - return self - - def checkRecursion( self, parseElementList ): - pass - - def validate( self, validateTrace=[] ): - """ - Check defined expressions for valid structure, check for infinite recursive definitions. - """ - self.checkRecursion( [] ) - - def parseFile( self, file_or_filename, parseAll=False ): - """ - Execute the parse expression on the given file or filename. - If a filename is specified (instead of a file object), - the entire file is opened, read, and closed before parsing. - """ - try: - file_contents = file_or_filename.read() - except AttributeError: - with open(file_or_filename, "r") as f: - file_contents = f.read() - try: - return self.parseString(file_contents, parseAll) - except ParseBaseException as exc: - if ParserElement.verbose_stacktrace: - raise - else: - # catch and re-raise exception from here, clears out pyparsing internal stack trace - raise exc - - def __eq__(self,other): - if isinstance(other, ParserElement): - return self is other or vars(self) == vars(other) - elif isinstance(other, basestring): - return self.matches(other) - else: - return super(ParserElement,self)==other - - def __ne__(self,other): - return not (self == other) - - def __hash__(self): - return hash(id(self)) - - def __req__(self,other): - return self == other - - def __rne__(self,other): - return not (self == other) - - def matches(self, testString, parseAll=True): - """ - Method for quick testing of a parser against a test string. Good for simple - inline microtests of sub expressions while building up larger parser. - - Parameters: - - testString - to test against this expression for a match - - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests - - Example:: - expr = Word(nums) - assert expr.matches("100") - """ - try: - self.parseString(_ustr(testString), parseAll=parseAll) - return True - except ParseBaseException: - return False - - def runTests(self, tests, parseAll=True, comment='#', fullDump=True, printResults=True, failureTests=False): - """ - Execute the parse expression on a series of test strings, showing each - test, the parsed results or where the parse failed. Quick and easy way to - run a parse expression against a list of sample strings. - - Parameters: - - tests - a list of separate test strings, or a multiline string of test strings - - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests - - comment - (default=C{'#'}) - expression for indicating embedded comments in the test - string; pass None to disable comment filtering - - fullDump - (default=C{True}) - dump results as list followed by results names in nested outline; - if False, only dump nested list - - printResults - (default=C{True}) prints test output to stdout - - failureTests - (default=C{False}) indicates if these tests are expected to fail parsing - - Returns: a (success, results) tuple, where success indicates that all tests succeeded - (or failed if C{failureTests} is True), and the results contain a list of lines of each - test's output - - Example:: - number_expr = pyparsing_common.number.copy() - - result = number_expr.runTests(''' - # unsigned integer - 100 - # negative integer - -100 - # float with scientific notation - 6.02e23 - # integer with scientific notation - 1e-12 - ''') - print("Success" if result[0] else "Failed!") - - result = number_expr.runTests(''' - # stray character - 100Z - # missing leading digit before '.' - -.100 - # too many '.' - 3.14.159 - ''', failureTests=True) - print("Success" if result[0] else "Failed!") - prints:: - # unsigned integer - 100 - [100] - - # negative integer - -100 - [-100] - - # float with scientific notation - 6.02e23 - [6.02e+23] - - # integer with scientific notation - 1e-12 - [1e-12] - - Success - - # stray character - 100Z - ^ - FAIL: Expected end of text (at char 3), (line:1, col:4) - - # missing leading digit before '.' - -.100 - ^ - FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1) - - # too many '.' - 3.14.159 - ^ - FAIL: Expected end of text (at char 4), (line:1, col:5) - - Success - - Each test string must be on a single line. If you want to test a string that spans multiple - lines, create a test like this:: - - expr.runTest(r"this is a test\\n of strings that spans \\n 3 lines") - - (Note that this is a raw string literal, you must include the leading 'r'.) - """ - if isinstance(tests, basestring): - tests = list(map(str.strip, tests.rstrip().splitlines())) - if isinstance(comment, basestring): - comment = Literal(comment) - allResults = [] - comments = [] - success = True - for t in tests: - if comment is not None and comment.matches(t, False) or comments and not t: - comments.append(t) - continue - if not t: - continue - out = ['\n'.join(comments), t] - comments = [] - try: - t = t.replace(r'\n','\n') - result = self.parseString(t, parseAll=parseAll) - out.append(result.dump(full=fullDump)) - success = success and not failureTests - except ParseBaseException as pe: - fatal = "(FATAL)" if isinstance(pe, ParseFatalException) else "" - if '\n' in t: - out.append(line(pe.loc, t)) - out.append(' '*(col(pe.loc,t)-1) + '^' + fatal) - else: - out.append(' '*pe.loc + '^' + fatal) - out.append("FAIL: " + str(pe)) - success = success and failureTests - result = pe - except Exception as exc: - out.append("FAIL-EXCEPTION: " + str(exc)) - success = success and failureTests - result = exc - - if printResults: - if fullDump: - out.append('') - print('\n'.join(out)) - - allResults.append((t, result)) - - return success, allResults - - -class Token(ParserElement): - """ - Abstract C{ParserElement} subclass, for defining atomic matching patterns. - """ - def __init__( self ): - super(Token,self).__init__( savelist=False ) - - -class Empty(Token): - """ - An empty token, will always match. - """ - def __init__( self ): - super(Empty,self).__init__() - self.name = "Empty" - self.mayReturnEmpty = True - self.mayIndexError = False - - -class NoMatch(Token): - """ - A token that will never match. - """ - def __init__( self ): - super(NoMatch,self).__init__() - self.name = "NoMatch" - self.mayReturnEmpty = True - self.mayIndexError = False - self.errmsg = "Unmatchable token" - - def parseImpl( self, instring, loc, doActions=True ): - raise ParseException(instring, loc, self.errmsg, self) - - -class Literal(Token): - """ - Token to exactly match a specified string. - - Example:: - Literal('blah').parseString('blah') # -> ['blah'] - Literal('blah').parseString('blahfooblah') # -> ['blah'] - Literal('blah').parseString('bla') # -> Exception: Expected "blah" - - For case-insensitive matching, use L{CaselessLiteral}. - - For keyword matching (force word break before and after the matched string), - use L{Keyword} or L{CaselessKeyword}. - """ - def __init__( self, matchString ): - super(Literal,self).__init__() - self.match = matchString - self.matchLen = len(matchString) - try: - self.firstMatchChar = matchString[0] - except IndexError: - warnings.warn("null string passed to Literal; use Empty() instead", - SyntaxWarning, stacklevel=2) - self.__class__ = Empty - self.name = '"%s"' % _ustr(self.match) - self.errmsg = "Expected " + self.name - self.mayReturnEmpty = False - self.mayIndexError = False - - # Performance tuning: this routine gets called a *lot* - # if this is a single character match string and the first character matches, - # short-circuit as quickly as possible, and avoid calling startswith - #~ @profile - def parseImpl( self, instring, loc, doActions=True ): - if (instring[loc] == self.firstMatchChar and - (self.matchLen==1 or instring.startswith(self.match,loc)) ): - return loc+self.matchLen, self.match - raise ParseException(instring, loc, self.errmsg, self) -_L = Literal -ParserElement._literalStringClass = Literal - -class Keyword(Token): - """ - Token to exactly match a specified string as a keyword, that is, it must be - immediately followed by a non-keyword character. Compare with C{L{Literal}}: - - C{Literal("if")} will match the leading C{'if'} in C{'ifAndOnlyIf'}. - - C{Keyword("if")} will not; it will only match the leading C{'if'} in C{'if x=1'}, or C{'if(y==2)'} - Accepts two optional constructor arguments in addition to the keyword string: - - C{identChars} is a string of characters that would be valid identifier characters, - defaulting to all alphanumerics + "_" and "$" - - C{caseless} allows case-insensitive matching, default is C{False}. - - Example:: - Keyword("start").parseString("start") # -> ['start'] - Keyword("start").parseString("starting") # -> Exception - - For case-insensitive matching, use L{CaselessKeyword}. - """ - DEFAULT_KEYWORD_CHARS = alphanums+"_$" - - def __init__( self, matchString, identChars=None, caseless=False ): - super(Keyword,self).__init__() - if identChars is None: - identChars = Keyword.DEFAULT_KEYWORD_CHARS - self.match = matchString - self.matchLen = len(matchString) - try: - self.firstMatchChar = matchString[0] - except IndexError: - warnings.warn("null string passed to Keyword; use Empty() instead", - SyntaxWarning, stacklevel=2) - self.name = '"%s"' % self.match - self.errmsg = "Expected " + self.name - self.mayReturnEmpty = False - self.mayIndexError = False - self.caseless = caseless - if caseless: - self.caselessmatch = matchString.upper() - identChars = identChars.upper() - self.identChars = set(identChars) - - def parseImpl( self, instring, loc, doActions=True ): - if self.caseless: - if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and - (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) and - (loc == 0 or instring[loc-1].upper() not in self.identChars) ): - return loc+self.matchLen, self.match - else: - if (instring[loc] == self.firstMatchChar and - (self.matchLen==1 or instring.startswith(self.match,loc)) and - (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen] not in self.identChars) and - (loc == 0 or instring[loc-1] not in self.identChars) ): - return loc+self.matchLen, self.match - raise ParseException(instring, loc, self.errmsg, self) - - def copy(self): - c = super(Keyword,self).copy() - c.identChars = Keyword.DEFAULT_KEYWORD_CHARS - return c - - @staticmethod - def setDefaultKeywordChars( chars ): - """Overrides the default Keyword chars - """ - Keyword.DEFAULT_KEYWORD_CHARS = chars - -class CaselessLiteral(Literal): - """ - Token to match a specified string, ignoring case of letters. - Note: the matched results will always be in the case of the given - match string, NOT the case of the input text. - - Example:: - OneOrMore(CaselessLiteral("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD', 'CMD'] - - (Contrast with example for L{CaselessKeyword}.) - """ - def __init__( self, matchString ): - super(CaselessLiteral,self).__init__( matchString.upper() ) - # Preserve the defining literal. - self.returnString = matchString - self.name = "'%s'" % self.returnString - self.errmsg = "Expected " + self.name - - def parseImpl( self, instring, loc, doActions=True ): - if instring[ loc:loc+self.matchLen ].upper() == self.match: - return loc+self.matchLen, self.returnString - raise ParseException(instring, loc, self.errmsg, self) - -class CaselessKeyword(Keyword): - """ - Caseless version of L{Keyword}. - - Example:: - OneOrMore(CaselessKeyword("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD'] - - (Contrast with example for L{CaselessLiteral}.) - """ - def __init__( self, matchString, identChars=None ): - super(CaselessKeyword,self).__init__( matchString, identChars, caseless=True ) - - def parseImpl( self, instring, loc, doActions=True ): - if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and - (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) ): - return loc+self.matchLen, self.match - raise ParseException(instring, loc, self.errmsg, self) - -class CloseMatch(Token): - """ - A variation on L{Literal} which matches "close" matches, that is, - strings with at most 'n' mismatching characters. C{CloseMatch} takes parameters: - - C{match_string} - string to be matched - - C{maxMismatches} - (C{default=1}) maximum number of mismatches allowed to count as a match - - The results from a successful parse will contain the matched text from the input string and the following named results: - - C{mismatches} - a list of the positions within the match_string where mismatches were found - - C{original} - the original match_string used to compare against the input string - - If C{mismatches} is an empty list, then the match was an exact match. - - Example:: - patt = CloseMatch("ATCATCGAATGGA") - patt.parseString("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']}) - patt.parseString("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1) - - # exact match - patt.parseString("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']}) - - # close match allowing up to 2 mismatches - patt = CloseMatch("ATCATCGAATGGA", maxMismatches=2) - patt.parseString("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']}) - """ - def __init__(self, match_string, maxMismatches=1): - super(CloseMatch,self).__init__() - self.name = match_string - self.match_string = match_string - self.maxMismatches = maxMismatches - self.errmsg = "Expected %r (with up to %d mismatches)" % (self.match_string, self.maxMismatches) - self.mayIndexError = False - self.mayReturnEmpty = False - - def parseImpl( self, instring, loc, doActions=True ): - start = loc - instrlen = len(instring) - maxloc = start + len(self.match_string) - - if maxloc <= instrlen: - match_string = self.match_string - match_stringloc = 0 - mismatches = [] - maxMismatches = self.maxMismatches - - for match_stringloc,s_m in enumerate(zip(instring[loc:maxloc], self.match_string)): - src,mat = s_m - if src != mat: - mismatches.append(match_stringloc) - if len(mismatches) > maxMismatches: - break - else: - loc = match_stringloc + 1 - results = ParseResults([instring[start:loc]]) - results['original'] = self.match_string - results['mismatches'] = mismatches - return loc, results - - raise ParseException(instring, loc, self.errmsg, self) - - -class Word(Token): - """ - Token for matching words composed of allowed character sets. - Defined with string containing all allowed initial characters, - an optional string containing allowed body characters (if omitted, - defaults to the initial character set), and an optional minimum, - maximum, and/or exact length. The default value for C{min} is 1 (a - minimum value < 1 is not valid); the default values for C{max} and C{exact} - are 0, meaning no maximum or exact length restriction. An optional - C{excludeChars} parameter can list characters that might be found in - the input C{bodyChars} string; useful to define a word of all printables - except for one or two characters, for instance. - - L{srange} is useful for defining custom character set strings for defining - C{Word} expressions, using range notation from regular expression character sets. - - A common mistake is to use C{Word} to match a specific literal string, as in - C{Word("Address")}. Remember that C{Word} uses the string argument to define - I{sets} of matchable characters. This expression would match "Add", "AAA", - "dAred", or any other word made up of the characters 'A', 'd', 'r', 'e', and 's'. - To match an exact literal string, use L{Literal} or L{Keyword}. - - pyparsing includes helper strings for building Words: - - L{alphas} - - L{nums} - - L{alphanums} - - L{hexnums} - - L{alphas8bit} (alphabetic characters in ASCII range 128-255 - accented, tilded, umlauted, etc.) - - L{punc8bit} (non-alphabetic characters in ASCII range 128-255 - currency, symbols, superscripts, diacriticals, etc.) - - L{printables} (any non-whitespace character) - - Example:: - # a word composed of digits - integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9")) - - # a word with a leading capital, and zero or more lowercase - capital_word = Word(alphas.upper(), alphas.lower()) - - # hostnames are alphanumeric, with leading alpha, and '-' - hostname = Word(alphas, alphanums+'-') - - # roman numeral (not a strict parser, accepts invalid mix of characters) - roman = Word("IVXLCDM") - - # any string of non-whitespace characters, except for ',' - csv_value = Word(printables, excludeChars=",") - """ - def __init__( self, initChars, bodyChars=None, min=1, max=0, exact=0, asKeyword=False, excludeChars=None ): - super(Word,self).__init__() - if excludeChars: - initChars = ''.join(c for c in initChars if c not in excludeChars) - if bodyChars: - bodyChars = ''.join(c for c in bodyChars if c not in excludeChars) - self.initCharsOrig = initChars - self.initChars = set(initChars) - if bodyChars : - self.bodyCharsOrig = bodyChars - self.bodyChars = set(bodyChars) - else: - self.bodyCharsOrig = initChars - self.bodyChars = set(initChars) - - self.maxSpecified = max > 0 - - if min < 1: - raise ValueError("cannot specify a minimum length < 1; use Optional(Word()) if zero-length word is permitted") - - self.minLen = min - - if max > 0: - self.maxLen = max - else: - self.maxLen = _MAX_INT - - if exact > 0: - self.maxLen = exact - self.minLen = exact - - self.name = _ustr(self) - self.errmsg = "Expected " + self.name - self.mayIndexError = False - self.asKeyword = asKeyword - - if ' ' not in self.initCharsOrig+self.bodyCharsOrig and (min==1 and max==0 and exact==0): - if self.bodyCharsOrig == self.initCharsOrig: - self.reString = "[%s]+" % _escapeRegexRangeChars(self.initCharsOrig) - elif len(self.initCharsOrig) == 1: - self.reString = "%s[%s]*" % \ - (re.escape(self.initCharsOrig), - _escapeRegexRangeChars(self.bodyCharsOrig),) - else: - self.reString = "[%s][%s]*" % \ - (_escapeRegexRangeChars(self.initCharsOrig), - _escapeRegexRangeChars(self.bodyCharsOrig),) - if self.asKeyword: - self.reString = r"\b"+self.reString+r"\b" - try: - self.re = re.compile( self.reString ) - except Exception: - self.re = None - - def parseImpl( self, instring, loc, doActions=True ): - if self.re: - result = self.re.match(instring,loc) - if not result: - raise ParseException(instring, loc, self.errmsg, self) - - loc = result.end() - return loc, result.group() - - if not(instring[ loc ] in self.initChars): - raise ParseException(instring, loc, self.errmsg, self) - - start = loc - loc += 1 - instrlen = len(instring) - bodychars = self.bodyChars - maxloc = start + self.maxLen - maxloc = min( maxloc, instrlen ) - while loc < maxloc and instring[loc] in bodychars: - loc += 1 - - throwException = False - if loc - start < self.minLen: - throwException = True - if self.maxSpecified and loc < instrlen and instring[loc] in bodychars: - throwException = True - if self.asKeyword: - if (start>0 and instring[start-1] in bodychars) or (loc4: - return s[:4]+"..." - else: - return s - - if ( self.initCharsOrig != self.bodyCharsOrig ): - self.strRepr = "W:(%s,%s)" % ( charsAsStr(self.initCharsOrig), charsAsStr(self.bodyCharsOrig) ) - else: - self.strRepr = "W:(%s)" % charsAsStr(self.initCharsOrig) - - return self.strRepr - - -class Regex(Token): - r""" - Token for matching strings that match a given regular expression. - Defined with string specifying the regular expression in a form recognized by the inbuilt Python re module. - If the given regex contains named groups (defined using C{(?P...)}), these will be preserved as - named parse results. - - Example:: - realnum = Regex(r"[+-]?\d+\.\d*") - date = Regex(r'(?P\d{4})-(?P\d\d?)-(?P\d\d?)') - # ref: http://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression - roman = Regex(r"M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})") - """ - compiledREtype = type(re.compile("[A-Z]")) - def __init__( self, pattern, flags=0): - """The parameters C{pattern} and C{flags} are passed to the C{re.compile()} function as-is. See the Python C{re} module for an explanation of the acceptable patterns and flags.""" - super(Regex,self).__init__() - - if isinstance(pattern, basestring): - if not pattern: - warnings.warn("null string passed to Regex; use Empty() instead", - SyntaxWarning, stacklevel=2) - - self.pattern = pattern - self.flags = flags - - try: - self.re = re.compile(self.pattern, self.flags) - self.reString = self.pattern - except sre_constants.error: - warnings.warn("invalid pattern (%s) passed to Regex" % pattern, - SyntaxWarning, stacklevel=2) - raise - - elif isinstance(pattern, Regex.compiledREtype): - self.re = pattern - self.pattern = \ - self.reString = str(pattern) - self.flags = flags - - else: - raise ValueError("Regex may only be constructed with a string or a compiled RE object") - - self.name = _ustr(self) - self.errmsg = "Expected " + self.name - self.mayIndexError = False - self.mayReturnEmpty = True - - def parseImpl( self, instring, loc, doActions=True ): - result = self.re.match(instring,loc) - if not result: - raise ParseException(instring, loc, self.errmsg, self) - - loc = result.end() - d = result.groupdict() - ret = ParseResults(result.group()) - if d: - for k in d: - ret[k] = d[k] - return loc,ret - - def __str__( self ): - try: - return super(Regex,self).__str__() - except Exception: - pass - - if self.strRepr is None: - self.strRepr = "Re:(%s)" % repr(self.pattern) - - return self.strRepr - - -class QuotedString(Token): - r""" - Token for matching strings that are delimited by quoting characters. - - Defined with the following parameters: - - quoteChar - string of one or more characters defining the quote delimiting string - - escChar - character to escape quotes, typically backslash (default=C{None}) - - escQuote - special quote sequence to escape an embedded quote string (such as SQL's "" to escape an embedded ") (default=C{None}) - - multiline - boolean indicating whether quotes can span multiple lines (default=C{False}) - - unquoteResults - boolean indicating whether the matched text should be unquoted (default=C{True}) - - endQuoteChar - string of one or more characters defining the end of the quote delimited string (default=C{None} => same as quoteChar) - - convertWhitespaceEscapes - convert escaped whitespace (C{'\t'}, C{'\n'}, etc.) to actual whitespace (default=C{True}) - - Example:: - qs = QuotedString('"') - print(qs.searchString('lsjdf "This is the quote" sldjf')) - complex_qs = QuotedString('{{', endQuoteChar='}}') - print(complex_qs.searchString('lsjdf {{This is the "quote"}} sldjf')) - sql_qs = QuotedString('"', escQuote='""') - print(sql_qs.searchString('lsjdf "This is the quote with ""embedded"" quotes" sldjf')) - prints:: - [['This is the quote']] - [['This is the "quote"']] - [['This is the quote with "embedded" quotes']] - """ - def __init__( self, quoteChar, escChar=None, escQuote=None, multiline=False, unquoteResults=True, endQuoteChar=None, convertWhitespaceEscapes=True): - super(QuotedString,self).__init__() - - # remove white space from quote chars - wont work anyway - quoteChar = quoteChar.strip() - if not quoteChar: - warnings.warn("quoteChar cannot be the empty string",SyntaxWarning,stacklevel=2) - raise SyntaxError() - - if endQuoteChar is None: - endQuoteChar = quoteChar - else: - endQuoteChar = endQuoteChar.strip() - if not endQuoteChar: - warnings.warn("endQuoteChar cannot be the empty string",SyntaxWarning,stacklevel=2) - raise SyntaxError() - - self.quoteChar = quoteChar - self.quoteCharLen = len(quoteChar) - self.firstQuoteChar = quoteChar[0] - self.endQuoteChar = endQuoteChar - self.endQuoteCharLen = len(endQuoteChar) - self.escChar = escChar - self.escQuote = escQuote - self.unquoteResults = unquoteResults - self.convertWhitespaceEscapes = convertWhitespaceEscapes - - if multiline: - self.flags = re.MULTILINE | re.DOTALL - self.pattern = r'%s(?:[^%s%s]' % \ - ( re.escape(self.quoteChar), - _escapeRegexRangeChars(self.endQuoteChar[0]), - (escChar is not None and _escapeRegexRangeChars(escChar) or '') ) - else: - self.flags = 0 - self.pattern = r'%s(?:[^%s\n\r%s]' % \ - ( re.escape(self.quoteChar), - _escapeRegexRangeChars(self.endQuoteChar[0]), - (escChar is not None and _escapeRegexRangeChars(escChar) or '') ) - if len(self.endQuoteChar) > 1: - self.pattern += ( - '|(?:' + ')|(?:'.join("%s[^%s]" % (re.escape(self.endQuoteChar[:i]), - _escapeRegexRangeChars(self.endQuoteChar[i])) - for i in range(len(self.endQuoteChar)-1,0,-1)) + ')' - ) - if escQuote: - self.pattern += (r'|(?:%s)' % re.escape(escQuote)) - if escChar: - self.pattern += (r'|(?:%s.)' % re.escape(escChar)) - self.escCharReplacePattern = re.escape(self.escChar)+"(.)" - self.pattern += (r')*%s' % re.escape(self.endQuoteChar)) - - try: - self.re = re.compile(self.pattern, self.flags) - self.reString = self.pattern - except sre_constants.error: - warnings.warn("invalid pattern (%s) passed to Regex" % self.pattern, - SyntaxWarning, stacklevel=2) - raise - - self.name = _ustr(self) - self.errmsg = "Expected " + self.name - self.mayIndexError = False - self.mayReturnEmpty = True - - def parseImpl( self, instring, loc, doActions=True ): - result = instring[loc] == self.firstQuoteChar and self.re.match(instring,loc) or None - if not result: - raise ParseException(instring, loc, self.errmsg, self) - - loc = result.end() - ret = result.group() - - if self.unquoteResults: - - # strip off quotes - ret = ret[self.quoteCharLen:-self.endQuoteCharLen] - - if isinstance(ret,basestring): - # replace escaped whitespace - if '\\' in ret and self.convertWhitespaceEscapes: - ws_map = { - r'\t' : '\t', - r'\n' : '\n', - r'\f' : '\f', - r'\r' : '\r', - } - for wslit,wschar in ws_map.items(): - ret = ret.replace(wslit, wschar) - - # replace escaped characters - if self.escChar: - ret = re.sub(self.escCharReplacePattern, r"\g<1>", ret) - - # replace escaped quotes - if self.escQuote: - ret = ret.replace(self.escQuote, self.endQuoteChar) - - return loc, ret - - def __str__( self ): - try: - return super(QuotedString,self).__str__() - except Exception: - pass - - if self.strRepr is None: - self.strRepr = "quoted string, starting with %s ending with %s" % (self.quoteChar, self.endQuoteChar) - - return self.strRepr - - -class CharsNotIn(Token): - """ - Token for matching words composed of characters I{not} in a given set (will - include whitespace in matched characters if not listed in the provided exclusion set - see example). - Defined with string containing all disallowed characters, and an optional - minimum, maximum, and/or exact length. The default value for C{min} is 1 (a - minimum value < 1 is not valid); the default values for C{max} and C{exact} - are 0, meaning no maximum or exact length restriction. - - Example:: - # define a comma-separated-value as anything that is not a ',' - csv_value = CharsNotIn(',') - print(delimitedList(csv_value).parseString("dkls,lsdkjf,s12 34,@!#,213")) - prints:: - ['dkls', 'lsdkjf', 's12 34', '@!#', '213'] - """ - def __init__( self, notChars, min=1, max=0, exact=0 ): - super(CharsNotIn,self).__init__() - self.skipWhitespace = False - self.notChars = notChars - - if min < 1: - raise ValueError("cannot specify a minimum length < 1; use Optional(CharsNotIn()) if zero-length char group is permitted") - - self.minLen = min - - if max > 0: - self.maxLen = max - else: - self.maxLen = _MAX_INT - - if exact > 0: - self.maxLen = exact - self.minLen = exact - - self.name = _ustr(self) - self.errmsg = "Expected " + self.name - self.mayReturnEmpty = ( self.minLen == 0 ) - self.mayIndexError = False - - def parseImpl( self, instring, loc, doActions=True ): - if instring[loc] in self.notChars: - raise ParseException(instring, loc, self.errmsg, self) - - start = loc - loc += 1 - notchars = self.notChars - maxlen = min( start+self.maxLen, len(instring) ) - while loc < maxlen and \ - (instring[loc] not in notchars): - loc += 1 - - if loc - start < self.minLen: - raise ParseException(instring, loc, self.errmsg, self) - - return loc, instring[start:loc] - - def __str__( self ): - try: - return super(CharsNotIn, self).__str__() - except Exception: - pass - - if self.strRepr is None: - if len(self.notChars) > 4: - self.strRepr = "!W:(%s...)" % self.notChars[:4] - else: - self.strRepr = "!W:(%s)" % self.notChars - - return self.strRepr - -class White(Token): - """ - Special matching class for matching whitespace. Normally, whitespace is ignored - by pyparsing grammars. This class is included when some whitespace structures - are significant. Define with a string containing the whitespace characters to be - matched; default is C{" \\t\\r\\n"}. Also takes optional C{min}, C{max}, and C{exact} arguments, - as defined for the C{L{Word}} class. - """ - whiteStrs = { - " " : "", - "\t": "", - "\n": "", - "\r": "", - "\f": "", - } - def __init__(self, ws=" \t\r\n", min=1, max=0, exact=0): - super(White,self).__init__() - self.matchWhite = ws - self.setWhitespaceChars( "".join(c for c in self.whiteChars if c not in self.matchWhite) ) - #~ self.leaveWhitespace() - self.name = ("".join(White.whiteStrs[c] for c in self.matchWhite)) - self.mayReturnEmpty = True - self.errmsg = "Expected " + self.name - - self.minLen = min - - if max > 0: - self.maxLen = max - else: - self.maxLen = _MAX_INT - - if exact > 0: - self.maxLen = exact - self.minLen = exact - - def parseImpl( self, instring, loc, doActions=True ): - if not(instring[ loc ] in self.matchWhite): - raise ParseException(instring, loc, self.errmsg, self) - start = loc - loc += 1 - maxloc = start + self.maxLen - maxloc = min( maxloc, len(instring) ) - while loc < maxloc and instring[loc] in self.matchWhite: - loc += 1 - - if loc - start < self.minLen: - raise ParseException(instring, loc, self.errmsg, self) - - return loc, instring[start:loc] - - -class _PositionToken(Token): - def __init__( self ): - super(_PositionToken,self).__init__() - self.name=self.__class__.__name__ - self.mayReturnEmpty = True - self.mayIndexError = False - -class GoToColumn(_PositionToken): - """ - Token to advance to a specific column of input text; useful for tabular report scraping. - """ - def __init__( self, colno ): - super(GoToColumn,self).__init__() - self.col = colno - - def preParse( self, instring, loc ): - if col(loc,instring) != self.col: - instrlen = len(instring) - if self.ignoreExprs: - loc = self._skipIgnorables( instring, loc ) - while loc < instrlen and instring[loc].isspace() and col( loc, instring ) != self.col : - loc += 1 - return loc - - def parseImpl( self, instring, loc, doActions=True ): - thiscol = col( loc, instring ) - if thiscol > self.col: - raise ParseException( instring, loc, "Text not in expected column", self ) - newloc = loc + self.col - thiscol - ret = instring[ loc: newloc ] - return newloc, ret - - -class LineStart(_PositionToken): - """ - Matches if current position is at the beginning of a line within the parse string - - Example:: - - test = '''\ - AAA this line - AAA and this line - AAA but not this one - B AAA and definitely not this one - ''' - - for t in (LineStart() + 'AAA' + restOfLine).searchString(test): - print(t) - - Prints:: - ['AAA', ' this line'] - ['AAA', ' and this line'] - - """ - def __init__( self ): - super(LineStart,self).__init__() - self.errmsg = "Expected start of line" - - def parseImpl( self, instring, loc, doActions=True ): - if col(loc, instring) == 1: - return loc, [] - raise ParseException(instring, loc, self.errmsg, self) - -class LineEnd(_PositionToken): - """ - Matches if current position is at the end of a line within the parse string - """ - def __init__( self ): - super(LineEnd,self).__init__() - self.setWhitespaceChars( ParserElement.DEFAULT_WHITE_CHARS.replace("\n","") ) - self.errmsg = "Expected end of line" - - def parseImpl( self, instring, loc, doActions=True ): - if loc len(instring): - return loc, [] - else: - raise ParseException(instring, loc, self.errmsg, self) - -class WordStart(_PositionToken): - """ - Matches if the current position is at the beginning of a Word, and - is not preceded by any character in a given set of C{wordChars} - (default=C{printables}). To emulate the C{\b} behavior of regular expressions, - use C{WordStart(alphanums)}. C{WordStart} will also match at the beginning of - the string being parsed, or at the beginning of a line. - """ - def __init__(self, wordChars = printables): - super(WordStart,self).__init__() - self.wordChars = set(wordChars) - self.errmsg = "Not at the start of a word" - - def parseImpl(self, instring, loc, doActions=True ): - if loc != 0: - if (instring[loc-1] in self.wordChars or - instring[loc] not in self.wordChars): - raise ParseException(instring, loc, self.errmsg, self) - return loc, [] - -class WordEnd(_PositionToken): - """ - Matches if the current position is at the end of a Word, and - is not followed by any character in a given set of C{wordChars} - (default=C{printables}). To emulate the C{\b} behavior of regular expressions, - use C{WordEnd(alphanums)}. C{WordEnd} will also match at the end of - the string being parsed, or at the end of a line. - """ - def __init__(self, wordChars = printables): - super(WordEnd,self).__init__() - self.wordChars = set(wordChars) - self.skipWhitespace = False - self.errmsg = "Not at the end of a word" - - def parseImpl(self, instring, loc, doActions=True ): - instrlen = len(instring) - if instrlen>0 and loc maxExcLoc: - maxException = err - maxExcLoc = err.loc - except IndexError: - if len(instring) > maxExcLoc: - maxException = ParseException(instring,len(instring),e.errmsg,self) - maxExcLoc = len(instring) - else: - # save match among all matches, to retry longest to shortest - matches.append((loc2, e)) - - if matches: - matches.sort(key=lambda x: -x[0]) - for _,e in matches: - try: - return e._parse( instring, loc, doActions ) - except ParseException as err: - err.__traceback__ = None - if err.loc > maxExcLoc: - maxException = err - maxExcLoc = err.loc - - if maxException is not None: - maxException.msg = self.errmsg - raise maxException - else: - raise ParseException(instring, loc, "no defined alternatives to match", self) - - - def __ixor__(self, other ): - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - return self.append( other ) #Or( [ self, other ] ) - - def __str__( self ): - if hasattr(self,"name"): - return self.name - - if self.strRepr is None: - self.strRepr = "{" + " ^ ".join(_ustr(e) for e in self.exprs) + "}" - - return self.strRepr - - def checkRecursion( self, parseElementList ): - subRecCheckList = parseElementList[:] + [ self ] - for e in self.exprs: - e.checkRecursion( subRecCheckList ) - - -class MatchFirst(ParseExpression): - """ - Requires that at least one C{ParseExpression} is found. - If two expressions match, the first one listed is the one that will match. - May be constructed using the C{'|'} operator. - - Example:: - # construct MatchFirst using '|' operator - - # watch the order of expressions to match - number = Word(nums) | Combine(Word(nums) + '.' + Word(nums)) - print(number.searchString("123 3.1416 789")) # Fail! -> [['123'], ['3'], ['1416'], ['789']] - - # put more selective expression first - number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums) - print(number.searchString("123 3.1416 789")) # Better -> [['123'], ['3.1416'], ['789']] - """ - def __init__( self, exprs, savelist = False ): - super(MatchFirst,self).__init__(exprs, savelist) - if self.exprs: - self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs) - else: - self.mayReturnEmpty = True - - def parseImpl( self, instring, loc, doActions=True ): - maxExcLoc = -1 - maxException = None - for e in self.exprs: - try: - ret = e._parse( instring, loc, doActions ) - return ret - except ParseException as err: - if err.loc > maxExcLoc: - maxException = err - maxExcLoc = err.loc - except IndexError: - if len(instring) > maxExcLoc: - maxException = ParseException(instring,len(instring),e.errmsg,self) - maxExcLoc = len(instring) - - # only got here if no expression matched, raise exception for match that made it the furthest - else: - if maxException is not None: - maxException.msg = self.errmsg - raise maxException - else: - raise ParseException(instring, loc, "no defined alternatives to match", self) - - def __ior__(self, other ): - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - return self.append( other ) #MatchFirst( [ self, other ] ) - - def __str__( self ): - if hasattr(self,"name"): - return self.name - - if self.strRepr is None: - self.strRepr = "{" + " | ".join(_ustr(e) for e in self.exprs) + "}" - - return self.strRepr - - def checkRecursion( self, parseElementList ): - subRecCheckList = parseElementList[:] + [ self ] - for e in self.exprs: - e.checkRecursion( subRecCheckList ) - - -class Each(ParseExpression): - """ - Requires all given C{ParseExpression}s to be found, but in any order. - Expressions may be separated by whitespace. - May be constructed using the C{'&'} operator. - - Example:: - color = oneOf("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN") - shape_type = oneOf("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON") - integer = Word(nums) - shape_attr = "shape:" + shape_type("shape") - posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn") - color_attr = "color:" + color("color") - size_attr = "size:" + integer("size") - - # use Each (using operator '&') to accept attributes in any order - # (shape and posn are required, color and size are optional) - shape_spec = shape_attr & posn_attr & Optional(color_attr) & Optional(size_attr) - - shape_spec.runTests(''' - shape: SQUARE color: BLACK posn: 100, 120 - shape: CIRCLE size: 50 color: BLUE posn: 50,80 - color:GREEN size:20 shape:TRIANGLE posn:20,40 - ''' - ) - prints:: - shape: SQUARE color: BLACK posn: 100, 120 - ['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']] - - color: BLACK - - posn: ['100', ',', '120'] - - x: 100 - - y: 120 - - shape: SQUARE - - - shape: CIRCLE size: 50 color: BLUE posn: 50,80 - ['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']] - - color: BLUE - - posn: ['50', ',', '80'] - - x: 50 - - y: 80 - - shape: CIRCLE - - size: 50 - - - color: GREEN size: 20 shape: TRIANGLE posn: 20,40 - ['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']] - - color: GREEN - - posn: ['20', ',', '40'] - - x: 20 - - y: 40 - - shape: TRIANGLE - - size: 20 - """ - def __init__( self, exprs, savelist = True ): - super(Each,self).__init__(exprs, savelist) - self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs) - self.skipWhitespace = True - self.initExprGroups = True - - def parseImpl( self, instring, loc, doActions=True ): - if self.initExprGroups: - self.opt1map = dict((id(e.expr),e) for e in self.exprs if isinstance(e,Optional)) - opt1 = [ e.expr for e in self.exprs if isinstance(e,Optional) ] - opt2 = [ e for e in self.exprs if e.mayReturnEmpty and not isinstance(e,Optional)] - self.optionals = opt1 + opt2 - self.multioptionals = [ e.expr for e in self.exprs if isinstance(e,ZeroOrMore) ] - self.multirequired = [ e.expr for e in self.exprs if isinstance(e,OneOrMore) ] - self.required = [ e for e in self.exprs if not isinstance(e,(Optional,ZeroOrMore,OneOrMore)) ] - self.required += self.multirequired - self.initExprGroups = False - tmpLoc = loc - tmpReqd = self.required[:] - tmpOpt = self.optionals[:] - matchOrder = [] - - keepMatching = True - while keepMatching: - tmpExprs = tmpReqd + tmpOpt + self.multioptionals + self.multirequired - failed = [] - for e in tmpExprs: - try: - tmpLoc = e.tryParse( instring, tmpLoc ) - except ParseException: - failed.append(e) - else: - matchOrder.append(self.opt1map.get(id(e),e)) - if e in tmpReqd: - tmpReqd.remove(e) - elif e in tmpOpt: - tmpOpt.remove(e) - if len(failed) == len(tmpExprs): - keepMatching = False - - if tmpReqd: - missing = ", ".join(_ustr(e) for e in tmpReqd) - raise ParseException(instring,loc,"Missing one or more required elements (%s)" % missing ) - - # add any unmatched Optionals, in case they have default values defined - matchOrder += [e for e in self.exprs if isinstance(e,Optional) and e.expr in tmpOpt] - - resultlist = [] - for e in matchOrder: - loc,results = e._parse(instring,loc,doActions) - resultlist.append(results) - - finalResults = sum(resultlist, ParseResults([])) - return loc, finalResults - - def __str__( self ): - if hasattr(self,"name"): - return self.name - - if self.strRepr is None: - self.strRepr = "{" + " & ".join(_ustr(e) for e in self.exprs) + "}" - - return self.strRepr - - def checkRecursion( self, parseElementList ): - subRecCheckList = parseElementList[:] + [ self ] - for e in self.exprs: - e.checkRecursion( subRecCheckList ) - - -class ParseElementEnhance(ParserElement): - """ - Abstract subclass of C{ParserElement}, for combining and post-processing parsed tokens. - """ - def __init__( self, expr, savelist=False ): - super(ParseElementEnhance,self).__init__(savelist) - if isinstance( expr, basestring ): - if issubclass(ParserElement._literalStringClass, Token): - expr = ParserElement._literalStringClass(expr) - else: - expr = ParserElement._literalStringClass(Literal(expr)) - self.expr = expr - self.strRepr = None - if expr is not None: - self.mayIndexError = expr.mayIndexError - self.mayReturnEmpty = expr.mayReturnEmpty - self.setWhitespaceChars( expr.whiteChars ) - self.skipWhitespace = expr.skipWhitespace - self.saveAsList = expr.saveAsList - self.callPreparse = expr.callPreparse - self.ignoreExprs.extend(expr.ignoreExprs) - - def parseImpl( self, instring, loc, doActions=True ): - if self.expr is not None: - return self.expr._parse( instring, loc, doActions, callPreParse=False ) - else: - raise ParseException("",loc,self.errmsg,self) - - def leaveWhitespace( self ): - self.skipWhitespace = False - self.expr = self.expr.copy() - if self.expr is not None: - self.expr.leaveWhitespace() - return self - - def ignore( self, other ): - if isinstance( other, Suppress ): - if other not in self.ignoreExprs: - super( ParseElementEnhance, self).ignore( other ) - if self.expr is not None: - self.expr.ignore( self.ignoreExprs[-1] ) - else: - super( ParseElementEnhance, self).ignore( other ) - if self.expr is not None: - self.expr.ignore( self.ignoreExprs[-1] ) - return self - - def streamline( self ): - super(ParseElementEnhance,self).streamline() - if self.expr is not None: - self.expr.streamline() - return self - - def checkRecursion( self, parseElementList ): - if self in parseElementList: - raise RecursiveGrammarException( parseElementList+[self] ) - subRecCheckList = parseElementList[:] + [ self ] - if self.expr is not None: - self.expr.checkRecursion( subRecCheckList ) - - def validate( self, validateTrace=[] ): - tmp = validateTrace[:]+[self] - if self.expr is not None: - self.expr.validate(tmp) - self.checkRecursion( [] ) - - def __str__( self ): - try: - return super(ParseElementEnhance,self).__str__() - except Exception: - pass - - if self.strRepr is None and self.expr is not None: - self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.expr) ) - return self.strRepr - - -class FollowedBy(ParseElementEnhance): - """ - Lookahead matching of the given parse expression. C{FollowedBy} - does I{not} advance the parsing position within the input string, it only - verifies that the specified parse expression matches at the current - position. C{FollowedBy} always returns a null token list. - - Example:: - # use FollowedBy to match a label only if it is followed by a ':' - data_word = Word(alphas) - label = data_word + FollowedBy(':') - attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)) - - OneOrMore(attr_expr).parseString("shape: SQUARE color: BLACK posn: upper left").pprint() - prints:: - [['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']] - """ - def __init__( self, expr ): - super(FollowedBy,self).__init__(expr) - self.mayReturnEmpty = True - - def parseImpl( self, instring, loc, doActions=True ): - self.expr.tryParse( instring, loc ) - return loc, [] - - -class NotAny(ParseElementEnhance): - """ - Lookahead to disallow matching with the given parse expression. C{NotAny} - does I{not} advance the parsing position within the input string, it only - verifies that the specified parse expression does I{not} match at the current - position. Also, C{NotAny} does I{not} skip over leading whitespace. C{NotAny} - always returns a null token list. May be constructed using the '~' operator. - - Example:: - - """ - def __init__( self, expr ): - super(NotAny,self).__init__(expr) - #~ self.leaveWhitespace() - self.skipWhitespace = False # do NOT use self.leaveWhitespace(), don't want to propagate to exprs - self.mayReturnEmpty = True - self.errmsg = "Found unwanted token, "+_ustr(self.expr) - - def parseImpl( self, instring, loc, doActions=True ): - if self.expr.canParseNext(instring, loc): - raise ParseException(instring, loc, self.errmsg, self) - return loc, [] - - def __str__( self ): - if hasattr(self,"name"): - return self.name - - if self.strRepr is None: - self.strRepr = "~{" + _ustr(self.expr) + "}" - - return self.strRepr - -class _MultipleMatch(ParseElementEnhance): - def __init__( self, expr, stopOn=None): - super(_MultipleMatch, self).__init__(expr) - self.saveAsList = True - ender = stopOn - if isinstance(ender, basestring): - ender = ParserElement._literalStringClass(ender) - self.not_ender = ~ender if ender is not None else None - - def parseImpl( self, instring, loc, doActions=True ): - self_expr_parse = self.expr._parse - self_skip_ignorables = self._skipIgnorables - check_ender = self.not_ender is not None - if check_ender: - try_not_ender = self.not_ender.tryParse - - # must be at least one (but first see if we are the stopOn sentinel; - # if so, fail) - if check_ender: - try_not_ender(instring, loc) - loc, tokens = self_expr_parse( instring, loc, doActions, callPreParse=False ) - try: - hasIgnoreExprs = (not not self.ignoreExprs) - while 1: - if check_ender: - try_not_ender(instring, loc) - if hasIgnoreExprs: - preloc = self_skip_ignorables( instring, loc ) - else: - preloc = loc - loc, tmptokens = self_expr_parse( instring, preloc, doActions ) - if tmptokens or tmptokens.haskeys(): - tokens += tmptokens - except (ParseException,IndexError): - pass - - return loc, tokens - -class OneOrMore(_MultipleMatch): - """ - Repetition of one or more of the given expression. - - Parameters: - - expr - expression that must match one or more times - - stopOn - (default=C{None}) - expression for a terminating sentinel - (only required if the sentinel would ordinarily match the repetition - expression) - - Example:: - data_word = Word(alphas) - label = data_word + FollowedBy(':') - attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join)) - - text = "shape: SQUARE posn: upper left color: BLACK" - OneOrMore(attr_expr).parseString(text).pprint() # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']] - - # use stopOn attribute for OneOrMore to avoid reading label string as part of the data - attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)) - OneOrMore(attr_expr).parseString(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']] - - # could also be written as - (attr_expr * (1,)).parseString(text).pprint() - """ - - def __str__( self ): - if hasattr(self,"name"): - return self.name - - if self.strRepr is None: - self.strRepr = "{" + _ustr(self.expr) + "}..." - - return self.strRepr - -class ZeroOrMore(_MultipleMatch): - """ - Optional repetition of zero or more of the given expression. - - Parameters: - - expr - expression that must match zero or more times - - stopOn - (default=C{None}) - expression for a terminating sentinel - (only required if the sentinel would ordinarily match the repetition - expression) - - Example: similar to L{OneOrMore} - """ - def __init__( self, expr, stopOn=None): - super(ZeroOrMore,self).__init__(expr, stopOn=stopOn) - self.mayReturnEmpty = True - - def parseImpl( self, instring, loc, doActions=True ): - try: - return super(ZeroOrMore, self).parseImpl(instring, loc, doActions) - except (ParseException,IndexError): - return loc, [] - - def __str__( self ): - if hasattr(self,"name"): - return self.name - - if self.strRepr is None: - self.strRepr = "[" + _ustr(self.expr) + "]..." - - return self.strRepr - -class _NullToken(object): - def __bool__(self): - return False - __nonzero__ = __bool__ - def __str__(self): - return "" - -_optionalNotMatched = _NullToken() -class Optional(ParseElementEnhance): - """ - Optional matching of the given expression. - - Parameters: - - expr - expression that must match zero or more times - - default (optional) - value to be returned if the optional expression is not found. - - Example:: - # US postal code can be a 5-digit zip, plus optional 4-digit qualifier - zip = Combine(Word(nums, exact=5) + Optional('-' + Word(nums, exact=4))) - zip.runTests(''' - # traditional ZIP code - 12345 - - # ZIP+4 form - 12101-0001 - - # invalid ZIP - 98765- - ''') - prints:: - # traditional ZIP code - 12345 - ['12345'] - - # ZIP+4 form - 12101-0001 - ['12101-0001'] - - # invalid ZIP - 98765- - ^ - FAIL: Expected end of text (at char 5), (line:1, col:6) - """ - def __init__( self, expr, default=_optionalNotMatched ): - super(Optional,self).__init__( expr, savelist=False ) - self.saveAsList = self.expr.saveAsList - self.defaultValue = default - self.mayReturnEmpty = True - - def parseImpl( self, instring, loc, doActions=True ): - try: - loc, tokens = self.expr._parse( instring, loc, doActions, callPreParse=False ) - except (ParseException,IndexError): - if self.defaultValue is not _optionalNotMatched: - if self.expr.resultsName: - tokens = ParseResults([ self.defaultValue ]) - tokens[self.expr.resultsName] = self.defaultValue - else: - tokens = [ self.defaultValue ] - else: - tokens = [] - return loc, tokens - - def __str__( self ): - if hasattr(self,"name"): - return self.name - - if self.strRepr is None: - self.strRepr = "[" + _ustr(self.expr) + "]" - - return self.strRepr - -class SkipTo(ParseElementEnhance): - """ - Token for skipping over all undefined text until the matched expression is found. - - Parameters: - - expr - target expression marking the end of the data to be skipped - - include - (default=C{False}) if True, the target expression is also parsed - (the skipped text and target expression are returned as a 2-element list). - - ignore - (default=C{None}) used to define grammars (typically quoted strings and - comments) that might contain false matches to the target expression - - failOn - (default=C{None}) define expressions that are not allowed to be - included in the skipped test; if found before the target expression is found, - the SkipTo is not a match - - Example:: - report = ''' - Outstanding Issues Report - 1 Jan 2000 - - # | Severity | Description | Days Open - -----+----------+-------------------------------------------+----------- - 101 | Critical | Intermittent system crash | 6 - 94 | Cosmetic | Spelling error on Login ('log|n') | 14 - 79 | Minor | System slow when running too many reports | 47 - ''' - integer = Word(nums) - SEP = Suppress('|') - # use SkipTo to simply match everything up until the next SEP - # - ignore quoted strings, so that a '|' character inside a quoted string does not match - # - parse action will call token.strip() for each matched token, i.e., the description body - string_data = SkipTo(SEP, ignore=quotedString) - string_data.setParseAction(tokenMap(str.strip)) - ticket_expr = (integer("issue_num") + SEP - + string_data("sev") + SEP - + string_data("desc") + SEP - + integer("days_open")) - - for tkt in ticket_expr.searchString(report): - print tkt.dump() - prints:: - ['101', 'Critical', 'Intermittent system crash', '6'] - - days_open: 6 - - desc: Intermittent system crash - - issue_num: 101 - - sev: Critical - ['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14'] - - days_open: 14 - - desc: Spelling error on Login ('log|n') - - issue_num: 94 - - sev: Cosmetic - ['79', 'Minor', 'System slow when running too many reports', '47'] - - days_open: 47 - - desc: System slow when running too many reports - - issue_num: 79 - - sev: Minor - """ - def __init__( self, other, include=False, ignore=None, failOn=None ): - super( SkipTo, self ).__init__( other ) - self.ignoreExpr = ignore - self.mayReturnEmpty = True - self.mayIndexError = False - self.includeMatch = include - self.asList = False - if isinstance(failOn, basestring): - self.failOn = ParserElement._literalStringClass(failOn) - else: - self.failOn = failOn - self.errmsg = "No match found for "+_ustr(self.expr) - - def parseImpl( self, instring, loc, doActions=True ): - startloc = loc - instrlen = len(instring) - expr = self.expr - expr_parse = self.expr._parse - self_failOn_canParseNext = self.failOn.canParseNext if self.failOn is not None else None - self_ignoreExpr_tryParse = self.ignoreExpr.tryParse if self.ignoreExpr is not None else None - - tmploc = loc - while tmploc <= instrlen: - if self_failOn_canParseNext is not None: - # break if failOn expression matches - if self_failOn_canParseNext(instring, tmploc): - break - - if self_ignoreExpr_tryParse is not None: - # advance past ignore expressions - while 1: - try: - tmploc = self_ignoreExpr_tryParse(instring, tmploc) - except ParseBaseException: - break - - try: - expr_parse(instring, tmploc, doActions=False, callPreParse=False) - except (ParseException, IndexError): - # no match, advance loc in string - tmploc += 1 - else: - # matched skipto expr, done - break - - else: - # ran off the end of the input string without matching skipto expr, fail - raise ParseException(instring, loc, self.errmsg, self) - - # build up return values - loc = tmploc - skiptext = instring[startloc:loc] - skipresult = ParseResults(skiptext) - - if self.includeMatch: - loc, mat = expr_parse(instring,loc,doActions,callPreParse=False) - skipresult += mat - - return loc, skipresult - -class Forward(ParseElementEnhance): - """ - Forward declaration of an expression to be defined later - - used for recursive grammars, such as algebraic infix notation. - When the expression is known, it is assigned to the C{Forward} variable using the '<<' operator. - - Note: take care when assigning to C{Forward} not to overlook precedence of operators. - Specifically, '|' has a lower precedence than '<<', so that:: - fwdExpr << a | b | c - will actually be evaluated as:: - (fwdExpr << a) | b | c - thereby leaving b and c out as parseable alternatives. It is recommended that you - explicitly group the values inserted into the C{Forward}:: - fwdExpr << (a | b | c) - Converting to use the '<<=' operator instead will avoid this problem. - - See L{ParseResults.pprint} for an example of a recursive parser created using - C{Forward}. - """ - def __init__( self, other=None ): - super(Forward,self).__init__( other, savelist=False ) - - def __lshift__( self, other ): - if isinstance( other, basestring ): - other = ParserElement._literalStringClass(other) - self.expr = other - self.strRepr = None - self.mayIndexError = self.expr.mayIndexError - self.mayReturnEmpty = self.expr.mayReturnEmpty - self.setWhitespaceChars( self.expr.whiteChars ) - self.skipWhitespace = self.expr.skipWhitespace - self.saveAsList = self.expr.saveAsList - self.ignoreExprs.extend(self.expr.ignoreExprs) - return self - - def __ilshift__(self, other): - return self << other - - def leaveWhitespace( self ): - self.skipWhitespace = False - return self - - def streamline( self ): - if not self.streamlined: - self.streamlined = True - if self.expr is not None: - self.expr.streamline() - return self - - def validate( self, validateTrace=[] ): - if self not in validateTrace: - tmp = validateTrace[:]+[self] - if self.expr is not None: - self.expr.validate(tmp) - self.checkRecursion([]) - - def __str__( self ): - if hasattr(self,"name"): - return self.name - return self.__class__.__name__ + ": ..." - - # stubbed out for now - creates awful memory and perf issues - self._revertClass = self.__class__ - self.__class__ = _ForwardNoRecurse - try: - if self.expr is not None: - retString = _ustr(self.expr) - else: - retString = "None" - finally: - self.__class__ = self._revertClass - return self.__class__.__name__ + ": " + retString - - def copy(self): - if self.expr is not None: - return super(Forward,self).copy() - else: - ret = Forward() - ret <<= self - return ret - -class _ForwardNoRecurse(Forward): - def __str__( self ): - return "..." - -class TokenConverter(ParseElementEnhance): - """ - Abstract subclass of C{ParseExpression}, for converting parsed results. - """ - def __init__( self, expr, savelist=False ): - super(TokenConverter,self).__init__( expr )#, savelist ) - self.saveAsList = False - -class Combine(TokenConverter): - """ - Converter to concatenate all matching tokens to a single string. - By default, the matching patterns must also be contiguous in the input string; - this can be disabled by specifying C{'adjacent=False'} in the constructor. - - Example:: - real = Word(nums) + '.' + Word(nums) - print(real.parseString('3.1416')) # -> ['3', '.', '1416'] - # will also erroneously match the following - print(real.parseString('3. 1416')) # -> ['3', '.', '1416'] - - real = Combine(Word(nums) + '.' + Word(nums)) - print(real.parseString('3.1416')) # -> ['3.1416'] - # no match when there are internal spaces - print(real.parseString('3. 1416')) # -> Exception: Expected W:(0123...) - """ - def __init__( self, expr, joinString="", adjacent=True ): - super(Combine,self).__init__( expr ) - # suppress whitespace-stripping in contained parse expressions, but re-enable it on the Combine itself - if adjacent: - self.leaveWhitespace() - self.adjacent = adjacent - self.skipWhitespace = True - self.joinString = joinString - self.callPreparse = True - - def ignore( self, other ): - if self.adjacent: - ParserElement.ignore(self, other) - else: - super( Combine, self).ignore( other ) - return self - - def postParse( self, instring, loc, tokenlist ): - retToks = tokenlist.copy() - del retToks[:] - retToks += ParseResults([ "".join(tokenlist._asStringList(self.joinString)) ], modal=self.modalResults) - - if self.resultsName and retToks.haskeys(): - return [ retToks ] - else: - return retToks - -class Group(TokenConverter): - """ - Converter to return the matched tokens as a list - useful for returning tokens of C{L{ZeroOrMore}} and C{L{OneOrMore}} expressions. - - Example:: - ident = Word(alphas) - num = Word(nums) - term = ident | num - func = ident + Optional(delimitedList(term)) - print(func.parseString("fn a,b,100")) # -> ['fn', 'a', 'b', '100'] - - func = ident + Group(Optional(delimitedList(term))) - print(func.parseString("fn a,b,100")) # -> ['fn', ['a', 'b', '100']] - """ - def __init__( self, expr ): - super(Group,self).__init__( expr ) - self.saveAsList = True - - def postParse( self, instring, loc, tokenlist ): - return [ tokenlist ] - -class Dict(TokenConverter): - """ - Converter to return a repetitive expression as a list, but also as a dictionary. - Each element can also be referenced using the first token in the expression as its key. - Useful for tabular report scraping when the first column can be used as a item key. - - Example:: - data_word = Word(alphas) - label = data_word + FollowedBy(':') - attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join)) - - text = "shape: SQUARE posn: upper left color: light blue texture: burlap" - attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)) - - # print attributes as plain groups - print(OneOrMore(attr_expr).parseString(text).dump()) - - # instead of OneOrMore(expr), parse using Dict(OneOrMore(Group(expr))) - Dict will auto-assign names - result = Dict(OneOrMore(Group(attr_expr))).parseString(text) - print(result.dump()) - - # access named fields as dict entries, or output as dict - print(result['shape']) - print(result.asDict()) - prints:: - ['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap'] - - [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']] - - color: light blue - - posn: upper left - - shape: SQUARE - - texture: burlap - SQUARE - {'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'} - See more examples at L{ParseResults} of accessing fields by results name. - """ - def __init__( self, expr ): - super(Dict,self).__init__( expr ) - self.saveAsList = True - - def postParse( self, instring, loc, tokenlist ): - for i,tok in enumerate(tokenlist): - if len(tok) == 0: - continue - ikey = tok[0] - if isinstance(ikey,int): - ikey = _ustr(tok[0]).strip() - if len(tok)==1: - tokenlist[ikey] = _ParseResultsWithOffset("",i) - elif len(tok)==2 and not isinstance(tok[1],ParseResults): - tokenlist[ikey] = _ParseResultsWithOffset(tok[1],i) - else: - dictvalue = tok.copy() #ParseResults(i) - del dictvalue[0] - if len(dictvalue)!= 1 or (isinstance(dictvalue,ParseResults) and dictvalue.haskeys()): - tokenlist[ikey] = _ParseResultsWithOffset(dictvalue,i) - else: - tokenlist[ikey] = _ParseResultsWithOffset(dictvalue[0],i) - - if self.resultsName: - return [ tokenlist ] - else: - return tokenlist - - -class Suppress(TokenConverter): - """ - Converter for ignoring the results of a parsed expression. - - Example:: - source = "a, b, c,d" - wd = Word(alphas) - wd_list1 = wd + ZeroOrMore(',' + wd) - print(wd_list1.parseString(source)) - - # often, delimiters that are useful during parsing are just in the - # way afterward - use Suppress to keep them out of the parsed output - wd_list2 = wd + ZeroOrMore(Suppress(',') + wd) - print(wd_list2.parseString(source)) - prints:: - ['a', ',', 'b', ',', 'c', ',', 'd'] - ['a', 'b', 'c', 'd'] - (See also L{delimitedList}.) - """ - def postParse( self, instring, loc, tokenlist ): - return [] - - def suppress( self ): - return self - - -class OnlyOnce(object): - """ - Wrapper for parse actions, to ensure they are only called once. - """ - def __init__(self, methodCall): - self.callable = _trim_arity(methodCall) - self.called = False - def __call__(self,s,l,t): - if not self.called: - results = self.callable(s,l,t) - self.called = True - return results - raise ParseException(s,l,"") - def reset(self): - self.called = False - -def traceParseAction(f): - """ - Decorator for debugging parse actions. - - When the parse action is called, this decorator will print C{">> entering I{method-name}(line:I{current_source_line}, I{parse_location}, I{matched_tokens})".} - When the parse action completes, the decorator will print C{"<<"} followed by the returned value, or any exception that the parse action raised. - - Example:: - wd = Word(alphas) - - @traceParseAction - def remove_duplicate_chars(tokens): - return ''.join(sorted(set(''.join(tokens)))) - - wds = OneOrMore(wd).setParseAction(remove_duplicate_chars) - print(wds.parseString("slkdjs sld sldd sdlf sdljf")) - prints:: - >>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {})) - <3: - thisFunc = paArgs[0].__class__.__name__ + '.' + thisFunc - sys.stderr.write( ">>entering %s(line: '%s', %d, %r)\n" % (thisFunc,line(l,s),l,t) ) - try: - ret = f(*paArgs) - except Exception as exc: - sys.stderr.write( "< ['aa', 'bb', 'cc'] - delimitedList(Word(hexnums), delim=':', combine=True).parseString("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE'] - """ - dlName = _ustr(expr)+" ["+_ustr(delim)+" "+_ustr(expr)+"]..." - if combine: - return Combine( expr + ZeroOrMore( delim + expr ) ).setName(dlName) - else: - return ( expr + ZeroOrMore( Suppress( delim ) + expr ) ).setName(dlName) - -def countedArray( expr, intExpr=None ): - """ - Helper to define a counted list of expressions. - This helper defines a pattern of the form:: - integer expr expr expr... - where the leading integer tells how many expr expressions follow. - The matched tokens returns the array of expr tokens as a list - the leading count token is suppressed. - - If C{intExpr} is specified, it should be a pyparsing expression that produces an integer value. - - Example:: - countedArray(Word(alphas)).parseString('2 ab cd ef') # -> ['ab', 'cd'] - - # in this parser, the leading integer value is given in binary, - # '10' indicating that 2 values are in the array - binaryConstant = Word('01').setParseAction(lambda t: int(t[0], 2)) - countedArray(Word(alphas), intExpr=binaryConstant).parseString('10 ab cd ef') # -> ['ab', 'cd'] - """ - arrayExpr = Forward() - def countFieldParseAction(s,l,t): - n = t[0] - arrayExpr << (n and Group(And([expr]*n)) or Group(empty)) - return [] - if intExpr is None: - intExpr = Word(nums).setParseAction(lambda t:int(t[0])) - else: - intExpr = intExpr.copy() - intExpr.setName("arrayLen") - intExpr.addParseAction(countFieldParseAction, callDuringTry=True) - return ( intExpr + arrayExpr ).setName('(len) ' + _ustr(expr) + '...') - -def _flatten(L): - ret = [] - for i in L: - if isinstance(i,list): - ret.extend(_flatten(i)) - else: - ret.append(i) - return ret - -def matchPreviousLiteral(expr): - """ - Helper to define an expression that is indirectly defined from - the tokens matched in a previous expression, that is, it looks - for a 'repeat' of a previous expression. For example:: - first = Word(nums) - second = matchPreviousLiteral(first) - matchExpr = first + ":" + second - will match C{"1:1"}, but not C{"1:2"}. Because this matches a - previous literal, will also match the leading C{"1:1"} in C{"1:10"}. - If this is not desired, use C{matchPreviousExpr}. - Do I{not} use with packrat parsing enabled. - """ - rep = Forward() - def copyTokenToRepeater(s,l,t): - if t: - if len(t) == 1: - rep << t[0] - else: - # flatten t tokens - tflat = _flatten(t.asList()) - rep << And(Literal(tt) for tt in tflat) - else: - rep << Empty() - expr.addParseAction(copyTokenToRepeater, callDuringTry=True) - rep.setName('(prev) ' + _ustr(expr)) - return rep - -def matchPreviousExpr(expr): - """ - Helper to define an expression that is indirectly defined from - the tokens matched in a previous expression, that is, it looks - for a 'repeat' of a previous expression. For example:: - first = Word(nums) - second = matchPreviousExpr(first) - matchExpr = first + ":" + second - will match C{"1:1"}, but not C{"1:2"}. Because this matches by - expressions, will I{not} match the leading C{"1:1"} in C{"1:10"}; - the expressions are evaluated first, and then compared, so - C{"1"} is compared with C{"10"}. - Do I{not} use with packrat parsing enabled. - """ - rep = Forward() - e2 = expr.copy() - rep <<= e2 - def copyTokenToRepeater(s,l,t): - matchTokens = _flatten(t.asList()) - def mustMatchTheseTokens(s,l,t): - theseTokens = _flatten(t.asList()) - if theseTokens != matchTokens: - raise ParseException("",0,"") - rep.setParseAction( mustMatchTheseTokens, callDuringTry=True ) - expr.addParseAction(copyTokenToRepeater, callDuringTry=True) - rep.setName('(prev) ' + _ustr(expr)) - return rep - -def _escapeRegexRangeChars(s): - #~ escape these chars: ^-] - for c in r"\^-]": - s = s.replace(c,_bslash+c) - s = s.replace("\n",r"\n") - s = s.replace("\t",r"\t") - return _ustr(s) - -def oneOf( strs, caseless=False, useRegex=True ): - """ - Helper to quickly define a set of alternative Literals, and makes sure to do - longest-first testing when there is a conflict, regardless of the input order, - but returns a C{L{MatchFirst}} for best performance. - - Parameters: - - strs - a string of space-delimited literals, or a collection of string literals - - caseless - (default=C{False}) - treat all literals as caseless - - useRegex - (default=C{True}) - as an optimization, will generate a Regex - object; otherwise, will generate a C{MatchFirst} object (if C{caseless=True}, or - if creating a C{Regex} raises an exception) - - Example:: - comp_oper = oneOf("< = > <= >= !=") - var = Word(alphas) - number = Word(nums) - term = var | number - comparison_expr = term + comp_oper + term - print(comparison_expr.searchString("B = 12 AA=23 B<=AA AA>12")) - prints:: - [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']] - """ - if caseless: - isequal = ( lambda a,b: a.upper() == b.upper() ) - masks = ( lambda a,b: b.upper().startswith(a.upper()) ) - parseElementClass = CaselessLiteral - else: - isequal = ( lambda a,b: a == b ) - masks = ( lambda a,b: b.startswith(a) ) - parseElementClass = Literal - - symbols = [] - if isinstance(strs,basestring): - symbols = strs.split() - elif isinstance(strs, Iterable): - symbols = list(strs) - else: - warnings.warn("Invalid argument to oneOf, expected string or iterable", - SyntaxWarning, stacklevel=2) - if not symbols: - return NoMatch() - - i = 0 - while i < len(symbols)-1: - cur = symbols[i] - for j,other in enumerate(symbols[i+1:]): - if ( isequal(other, cur) ): - del symbols[i+j+1] - break - elif ( masks(cur, other) ): - del symbols[i+j+1] - symbols.insert(i,other) - cur = other - break - else: - i += 1 - - if not caseless and useRegex: - #~ print (strs,"->", "|".join( [ _escapeRegexChars(sym) for sym in symbols] )) - try: - if len(symbols)==len("".join(symbols)): - return Regex( "[%s]" % "".join(_escapeRegexRangeChars(sym) for sym in symbols) ).setName(' | '.join(symbols)) - else: - return Regex( "|".join(re.escape(sym) for sym in symbols) ).setName(' | '.join(symbols)) - except Exception: - warnings.warn("Exception creating Regex for oneOf, building MatchFirst", - SyntaxWarning, stacklevel=2) - - - # last resort, just use MatchFirst - return MatchFirst(parseElementClass(sym) for sym in symbols).setName(' | '.join(symbols)) - -def dictOf( key, value ): - """ - Helper to easily and clearly define a dictionary by specifying the respective patterns - for the key and value. Takes care of defining the C{L{Dict}}, C{L{ZeroOrMore}}, and C{L{Group}} tokens - in the proper order. The key pattern can include delimiting markers or punctuation, - as long as they are suppressed, thereby leaving the significant key text. The value - pattern can include named results, so that the C{Dict} results can include named token - fields. - - Example:: - text = "shape: SQUARE posn: upper left color: light blue texture: burlap" - attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)) - print(OneOrMore(attr_expr).parseString(text).dump()) - - attr_label = label - attr_value = Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join) - - # similar to Dict, but simpler call format - result = dictOf(attr_label, attr_value).parseString(text) - print(result.dump()) - print(result['shape']) - print(result.shape) # object attribute access works too - print(result.asDict()) - prints:: - [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']] - - color: light blue - - posn: upper left - - shape: SQUARE - - texture: burlap - SQUARE - SQUARE - {'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'} - """ - return Dict( ZeroOrMore( Group ( key + value ) ) ) - -def originalTextFor(expr, asString=True): - """ - Helper to return the original, untokenized text for a given expression. Useful to - restore the parsed fields of an HTML start tag into the raw tag text itself, or to - revert separate tokens with intervening whitespace back to the original matching - input text. By default, returns astring containing the original parsed text. - - If the optional C{asString} argument is passed as C{False}, then the return value is a - C{L{ParseResults}} containing any results names that were originally matched, and a - single token containing the original matched text from the input string. So if - the expression passed to C{L{originalTextFor}} contains expressions with defined - results names, you must set C{asString} to C{False} if you want to preserve those - results name values. - - Example:: - src = "this is test bold text normal text " - for tag in ("b","i"): - opener,closer = makeHTMLTags(tag) - patt = originalTextFor(opener + SkipTo(closer) + closer) - print(patt.searchString(src)[0]) - prints:: - [' bold text '] - ['text'] - """ - locMarker = Empty().setParseAction(lambda s,loc,t: loc) - endlocMarker = locMarker.copy() - endlocMarker.callPreparse = False - matchExpr = locMarker("_original_start") + expr + endlocMarker("_original_end") - if asString: - extractText = lambda s,l,t: s[t._original_start:t._original_end] - else: - def extractText(s,l,t): - t[:] = [s[t.pop('_original_start'):t.pop('_original_end')]] - matchExpr.setParseAction(extractText) - matchExpr.ignoreExprs = expr.ignoreExprs - return matchExpr - -def ungroup(expr): - """ - Helper to undo pyparsing's default grouping of And expressions, even - if all but one are non-empty. - """ - return TokenConverter(expr).setParseAction(lambda t:t[0]) - -def locatedExpr(expr): - """ - Helper to decorate a returned token with its starting and ending locations in the input string. - This helper adds the following results names: - - locn_start = location where matched expression begins - - locn_end = location where matched expression ends - - value = the actual parsed results - - Be careful if the input text contains C{} characters, you may want to call - C{L{ParserElement.parseWithTabs}} - - Example:: - wd = Word(alphas) - for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"): - print(match) - prints:: - [[0, 'ljsdf', 5]] - [[8, 'lksdjjf', 15]] - [[18, 'lkkjj', 23]] - """ - locator = Empty().setParseAction(lambda s,l,t: l) - return Group(locator("locn_start") + expr("value") + locator.copy().leaveWhitespace()("locn_end")) - - -# convenience constants for positional expressions -empty = Empty().setName("empty") -lineStart = LineStart().setName("lineStart") -lineEnd = LineEnd().setName("lineEnd") -stringStart = StringStart().setName("stringStart") -stringEnd = StringEnd().setName("stringEnd") - -_escapedPunc = Word( _bslash, r"\[]-*.$+^?()~ ", exact=2 ).setParseAction(lambda s,l,t:t[0][1]) -_escapedHexChar = Regex(r"\\0?[xX][0-9a-fA-F]+").setParseAction(lambda s,l,t:unichr(int(t[0].lstrip(r'\0x'),16))) -_escapedOctChar = Regex(r"\\0[0-7]+").setParseAction(lambda s,l,t:unichr(int(t[0][1:],8))) -_singleChar = _escapedPunc | _escapedHexChar | _escapedOctChar | CharsNotIn(r'\]', exact=1) -_charRange = Group(_singleChar + Suppress("-") + _singleChar) -_reBracketExpr = Literal("[") + Optional("^").setResultsName("negate") + Group( OneOrMore( _charRange | _singleChar ) ).setResultsName("body") + "]" - -def srange(s): - r""" - Helper to easily define string ranges for use in Word construction. Borrows - syntax from regexp '[]' string range definitions:: - srange("[0-9]") -> "0123456789" - srange("[a-z]") -> "abcdefghijklmnopqrstuvwxyz" - srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_" - The input string must be enclosed in []'s, and the returned string is the expanded - character set joined into a single string. - The values enclosed in the []'s may be: - - a single character - - an escaped character with a leading backslash (such as C{\-} or C{\]}) - - an escaped hex character with a leading C{'\x'} (C{\x21}, which is a C{'!'} character) - (C{\0x##} is also supported for backwards compatibility) - - an escaped octal character with a leading C{'\0'} (C{\041}, which is a C{'!'} character) - - a range of any of the above, separated by a dash (C{'a-z'}, etc.) - - any combination of the above (C{'aeiouy'}, C{'a-zA-Z0-9_$'}, etc.) - """ - _expanded = lambda p: p if not isinstance(p,ParseResults) else ''.join(unichr(c) for c in range(ord(p[0]),ord(p[1])+1)) - try: - return "".join(_expanded(part) for part in _reBracketExpr.parseString(s).body) - except Exception: - return "" - -def matchOnlyAtCol(n): - """ - Helper method for defining parse actions that require matching at a specific - column in the input text. - """ - def verifyCol(strg,locn,toks): - if col(locn,strg) != n: - raise ParseException(strg,locn,"matched token not at column %d" % n) - return verifyCol - -def replaceWith(replStr): - """ - Helper method for common parse actions that simply return a literal value. Especially - useful when used with C{L{transformString}()}. - - Example:: - num = Word(nums).setParseAction(lambda toks: int(toks[0])) - na = oneOf("N/A NA").setParseAction(replaceWith(math.nan)) - term = na | num - - OneOrMore(term).parseString("324 234 N/A 234") # -> [324, 234, nan, 234] - """ - return lambda s,l,t: [replStr] - -def removeQuotes(s,l,t): - """ - Helper parse action for removing quotation marks from parsed quoted strings. - - Example:: - # by default, quotation marks are included in parsed results - quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"] - - # use removeQuotes to strip quotation marks from parsed results - quotedString.setParseAction(removeQuotes) - quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"] - """ - return t[0][1:-1] - -def tokenMap(func, *args): - """ - Helper to define a parse action by mapping a function to all elements of a ParseResults list.If any additional - args are passed, they are forwarded to the given function as additional arguments after - the token, as in C{hex_integer = Word(hexnums).setParseAction(tokenMap(int, 16))}, which will convert the - parsed data to an integer using base 16. - - Example (compare the last to example in L{ParserElement.transformString}:: - hex_ints = OneOrMore(Word(hexnums)).setParseAction(tokenMap(int, 16)) - hex_ints.runTests(''' - 00 11 22 aa FF 0a 0d 1a - ''') - - upperword = Word(alphas).setParseAction(tokenMap(str.upper)) - OneOrMore(upperword).runTests(''' - my kingdom for a horse - ''') - - wd = Word(alphas).setParseAction(tokenMap(str.title)) - OneOrMore(wd).setParseAction(' '.join).runTests(''' - now is the winter of our discontent made glorious summer by this sun of york - ''') - prints:: - 00 11 22 aa FF 0a 0d 1a - [0, 17, 34, 170, 255, 10, 13, 26] - - my kingdom for a horse - ['MY', 'KINGDOM', 'FOR', 'A', 'HORSE'] - - now is the winter of our discontent made glorious summer by this sun of york - ['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York'] - """ - def pa(s,l,t): - return [func(tokn, *args) for tokn in t] - - try: - func_name = getattr(func, '__name__', - getattr(func, '__class__').__name__) - except Exception: - func_name = str(func) - pa.__name__ = func_name - - return pa - -upcaseTokens = tokenMap(lambda t: _ustr(t).upper()) -"""(Deprecated) Helper parse action to convert tokens to upper case. Deprecated in favor of L{pyparsing_common.upcaseTokens}""" - -downcaseTokens = tokenMap(lambda t: _ustr(t).lower()) -"""(Deprecated) Helper parse action to convert tokens to lower case. Deprecated in favor of L{pyparsing_common.downcaseTokens}""" - -def _makeTags(tagStr, xml): - """Internal helper to construct opening and closing tag expressions, given a tag name""" - if isinstance(tagStr,basestring): - resname = tagStr - tagStr = Keyword(tagStr, caseless=not xml) - else: - resname = tagStr.name - - tagAttrName = Word(alphas,alphanums+"_-:") - if (xml): - tagAttrValue = dblQuotedString.copy().setParseAction( removeQuotes ) - openTag = Suppress("<") + tagStr("tag") + \ - Dict(ZeroOrMore(Group( tagAttrName + Suppress("=") + tagAttrValue ))) + \ - Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">") - else: - printablesLessRAbrack = "".join(c for c in printables if c not in ">") - tagAttrValue = quotedString.copy().setParseAction( removeQuotes ) | Word(printablesLessRAbrack) - openTag = Suppress("<") + tagStr("tag") + \ - Dict(ZeroOrMore(Group( tagAttrName.setParseAction(downcaseTokens) + \ - Optional( Suppress("=") + tagAttrValue ) ))) + \ - Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">") - closeTag = Combine(_L("") - - openTag = openTag.setResultsName("start"+"".join(resname.replace(":"," ").title().split())).setName("<%s>" % resname) - closeTag = closeTag.setResultsName("end"+"".join(resname.replace(":"," ").title().split())).setName("" % resname) - openTag.tag = resname - closeTag.tag = resname - return openTag, closeTag - -def makeHTMLTags(tagStr): - """ - Helper to construct opening and closing tag expressions for HTML, given a tag name. Matches - tags in either upper or lower case, attributes with namespaces and with quoted or unquoted values. - - Example:: - text = 'More info at the pyparsing wiki page' - # makeHTMLTags returns pyparsing expressions for the opening and closing tags as a 2-tuple - a,a_end = makeHTMLTags("A") - link_expr = a + SkipTo(a_end)("link_text") + a_end - - for link in link_expr.searchString(text): - # attributes in the tag (like "href" shown here) are also accessible as named results - print(link.link_text, '->', link.href) - prints:: - pyparsing -> http://pyparsing.wikispaces.com - """ - return _makeTags( tagStr, False ) - -def makeXMLTags(tagStr): - """ - Helper to construct opening and closing tag expressions for XML, given a tag name. Matches - tags only in the given upper/lower case. - - Example: similar to L{makeHTMLTags} - """ - return _makeTags( tagStr, True ) - -def withAttribute(*args,**attrDict): - """ - Helper to create a validating parse action to be used with start tags created - with C{L{makeXMLTags}} or C{L{makeHTMLTags}}. Use C{withAttribute} to qualify a starting tag - with a required attribute value, to avoid false matches on common tags such as - C{} or C{
}. - - Call C{withAttribute} with a series of attribute names and values. Specify the list - of filter attributes names and values as: - - keyword arguments, as in C{(align="right")}, or - - as an explicit dict with C{**} operator, when an attribute name is also a Python - reserved word, as in C{**{"class":"Customer", "align":"right"}} - - a list of name-value tuples, as in ( ("ns1:class", "Customer"), ("ns2:align","right") ) - For attribute names with a namespace prefix, you must use the second form. Attribute - names are matched insensitive to upper/lower case. - - If just testing for C{class} (with or without a namespace), use C{L{withClass}}. - - To verify that the attribute exists, but without specifying a value, pass - C{withAttribute.ANY_VALUE} as the value. - - Example:: - html = ''' -
- Some text -
1 4 0 1 0
-
1,3 2,3 1,1
-
this has no type
-
- - ''' - div,div_end = makeHTMLTags("div") - - # only match div tag having a type attribute with value "grid" - div_grid = div().setParseAction(withAttribute(type="grid")) - grid_expr = div_grid + SkipTo(div | div_end)("body") - for grid_header in grid_expr.searchString(html): - print(grid_header.body) - - # construct a match with any div tag having a type attribute, regardless of the value - div_any_type = div().setParseAction(withAttribute(type=withAttribute.ANY_VALUE)) - div_expr = div_any_type + SkipTo(div | div_end)("body") - for div_header in div_expr.searchString(html): - print(div_header.body) - prints:: - 1 4 0 1 0 - - 1 4 0 1 0 - 1,3 2,3 1,1 - """ - if args: - attrs = args[:] - else: - attrs = attrDict.items() - attrs = [(k,v) for k,v in attrs] - def pa(s,l,tokens): - for attrName,attrValue in attrs: - if attrName not in tokens: - raise ParseException(s,l,"no matching attribute " + attrName) - if attrValue != withAttribute.ANY_VALUE and tokens[attrName] != attrValue: - raise ParseException(s,l,"attribute '%s' has value '%s', must be '%s'" % - (attrName, tokens[attrName], attrValue)) - return pa -withAttribute.ANY_VALUE = object() - -def withClass(classname, namespace=''): - """ - Simplified version of C{L{withAttribute}} when matching on a div class - made - difficult because C{class} is a reserved word in Python. - - Example:: - html = ''' -
- Some text -
1 4 0 1 0
-
1,3 2,3 1,1
-
this <div> has no class
-
- - ''' - div,div_end = makeHTMLTags("div") - div_grid = div().setParseAction(withClass("grid")) - - grid_expr = div_grid + SkipTo(div | div_end)("body") - for grid_header in grid_expr.searchString(html): - print(grid_header.body) - - div_any_type = div().setParseAction(withClass(withAttribute.ANY_VALUE)) - div_expr = div_any_type + SkipTo(div | div_end)("body") - for div_header in div_expr.searchString(html): - print(div_header.body) - prints:: - 1 4 0 1 0 - - 1 4 0 1 0 - 1,3 2,3 1,1 - """ - classattr = "%s:class" % namespace if namespace else "class" - return withAttribute(**{classattr : classname}) - -opAssoc = _Constants() -opAssoc.LEFT = object() -opAssoc.RIGHT = object() - -def infixNotation( baseExpr, opList, lpar=Suppress('('), rpar=Suppress(')') ): - """ - Helper method for constructing grammars of expressions made up of - operators working in a precedence hierarchy. Operators may be unary or - binary, left- or right-associative. Parse actions can also be attached - to operator expressions. The generated parser will also recognize the use - of parentheses to override operator precedences (see example below). - - Note: if you define a deep operator list, you may see performance issues - when using infixNotation. See L{ParserElement.enablePackrat} for a - mechanism to potentially improve your parser performance. - - Parameters: - - baseExpr - expression representing the most basic element for the nested - - opList - list of tuples, one for each operator precedence level in the - expression grammar; each tuple is of the form - (opExpr, numTerms, rightLeftAssoc, parseAction), where: - - opExpr is the pyparsing expression for the operator; - may also be a string, which will be converted to a Literal; - if numTerms is 3, opExpr is a tuple of two expressions, for the - two operators separating the 3 terms - - numTerms is the number of terms for this operator (must - be 1, 2, or 3) - - rightLeftAssoc is the indicator whether the operator is - right or left associative, using the pyparsing-defined - constants C{opAssoc.RIGHT} and C{opAssoc.LEFT}. - - parseAction is the parse action to be associated with - expressions matching this operator expression (the - parse action tuple member may be omitted); if the parse action - is passed a tuple or list of functions, this is equivalent to - calling C{setParseAction(*fn)} (L{ParserElement.setParseAction}) - - lpar - expression for matching left-parentheses (default=C{Suppress('(')}) - - rpar - expression for matching right-parentheses (default=C{Suppress(')')}) - - Example:: - # simple example of four-function arithmetic with ints and variable names - integer = pyparsing_common.signed_integer - varname = pyparsing_common.identifier - - arith_expr = infixNotation(integer | varname, - [ - ('-', 1, opAssoc.RIGHT), - (oneOf('* /'), 2, opAssoc.LEFT), - (oneOf('+ -'), 2, opAssoc.LEFT), - ]) - - arith_expr.runTests(''' - 5+3*6 - (5+3)*6 - -2--11 - ''', fullDump=False) - prints:: - 5+3*6 - [[5, '+', [3, '*', 6]]] - - (5+3)*6 - [[[5, '+', 3], '*', 6]] - - -2--11 - [[['-', 2], '-', ['-', 11]]] - """ - ret = Forward() - lastExpr = baseExpr | ( lpar + ret + rpar ) - for i,operDef in enumerate(opList): - opExpr,arity,rightLeftAssoc,pa = (operDef + (None,))[:4] - termName = "%s term" % opExpr if arity < 3 else "%s%s term" % opExpr - if arity == 3: - if opExpr is None or len(opExpr) != 2: - raise ValueError("if numterms=3, opExpr must be a tuple or list of two expressions") - opExpr1, opExpr2 = opExpr - thisExpr = Forward().setName(termName) - if rightLeftAssoc == opAssoc.LEFT: - if arity == 1: - matchExpr = FollowedBy(lastExpr + opExpr) + Group( lastExpr + OneOrMore( opExpr ) ) - elif arity == 2: - if opExpr is not None: - matchExpr = FollowedBy(lastExpr + opExpr + lastExpr) + Group( lastExpr + OneOrMore( opExpr + lastExpr ) ) - else: - matchExpr = FollowedBy(lastExpr+lastExpr) + Group( lastExpr + OneOrMore(lastExpr) ) - elif arity == 3: - matchExpr = FollowedBy(lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr) + \ - Group( lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr ) - else: - raise ValueError("operator must be unary (1), binary (2), or ternary (3)") - elif rightLeftAssoc == opAssoc.RIGHT: - if arity == 1: - # try to avoid LR with this extra test - if not isinstance(opExpr, Optional): - opExpr = Optional(opExpr) - matchExpr = FollowedBy(opExpr.expr + thisExpr) + Group( opExpr + thisExpr ) - elif arity == 2: - if opExpr is not None: - matchExpr = FollowedBy(lastExpr + opExpr + thisExpr) + Group( lastExpr + OneOrMore( opExpr + thisExpr ) ) - else: - matchExpr = FollowedBy(lastExpr + thisExpr) + Group( lastExpr + OneOrMore( thisExpr ) ) - elif arity == 3: - matchExpr = FollowedBy(lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr) + \ - Group( lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr ) - else: - raise ValueError("operator must be unary (1), binary (2), or ternary (3)") - else: - raise ValueError("operator must indicate right or left associativity") - if pa: - if isinstance(pa, (tuple, list)): - matchExpr.setParseAction(*pa) - else: - matchExpr.setParseAction(pa) - thisExpr <<= ( matchExpr.setName(termName) | lastExpr ) - lastExpr = thisExpr - ret <<= lastExpr - return ret - -operatorPrecedence = infixNotation -"""(Deprecated) Former name of C{L{infixNotation}}, will be dropped in a future release.""" - -dblQuotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"').setName("string enclosed in double quotes") -sglQuotedString = Combine(Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("string enclosed in single quotes") -quotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"'| - Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("quotedString using single or double quotes") -unicodeString = Combine(_L('u') + quotedString.copy()).setName("unicode string literal") - -def nestedExpr(opener="(", closer=")", content=None, ignoreExpr=quotedString.copy()): - """ - Helper method for defining nested lists enclosed in opening and closing - delimiters ("(" and ")" are the default). - - Parameters: - - opener - opening character for a nested list (default=C{"("}); can also be a pyparsing expression - - closer - closing character for a nested list (default=C{")"}); can also be a pyparsing expression - - content - expression for items within the nested lists (default=C{None}) - - ignoreExpr - expression for ignoring opening and closing delimiters (default=C{quotedString}) - - If an expression is not provided for the content argument, the nested - expression will capture all whitespace-delimited content between delimiters - as a list of separate values. - - Use the C{ignoreExpr} argument to define expressions that may contain - opening or closing characters that should not be treated as opening - or closing characters for nesting, such as quotedString or a comment - expression. Specify multiple expressions using an C{L{Or}} or C{L{MatchFirst}}. - The default is L{quotedString}, but if no expressions are to be ignored, - then pass C{None} for this argument. - - Example:: - data_type = oneOf("void int short long char float double") - decl_data_type = Combine(data_type + Optional(Word('*'))) - ident = Word(alphas+'_', alphanums+'_') - number = pyparsing_common.number - arg = Group(decl_data_type + ident) - LPAR,RPAR = map(Suppress, "()") - - code_body = nestedExpr('{', '}', ignoreExpr=(quotedString | cStyleComment)) - - c_function = (decl_data_type("type") - + ident("name") - + LPAR + Optional(delimitedList(arg), [])("args") + RPAR - + code_body("body")) - c_function.ignore(cStyleComment) - - source_code = ''' - int is_odd(int x) { - return (x%2); - } - - int dec_to_hex(char hchar) { - if (hchar >= '0' && hchar <= '9') { - return (ord(hchar)-ord('0')); - } else { - return (10+ord(hchar)-ord('A')); - } - } - ''' - for func in c_function.searchString(source_code): - print("%(name)s (%(type)s) args: %(args)s" % func) - - prints:: - is_odd (int) args: [['int', 'x']] - dec_to_hex (int) args: [['char', 'hchar']] - """ - if opener == closer: - raise ValueError("opening and closing strings cannot be the same") - if content is None: - if isinstance(opener,basestring) and isinstance(closer,basestring): - if len(opener) == 1 and len(closer)==1: - if ignoreExpr is not None: - content = (Combine(OneOrMore(~ignoreExpr + - CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS,exact=1)) - ).setParseAction(lambda t:t[0].strip())) - else: - content = (empty.copy()+CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS - ).setParseAction(lambda t:t[0].strip())) - else: - if ignoreExpr is not None: - content = (Combine(OneOrMore(~ignoreExpr + - ~Literal(opener) + ~Literal(closer) + - CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1)) - ).setParseAction(lambda t:t[0].strip())) - else: - content = (Combine(OneOrMore(~Literal(opener) + ~Literal(closer) + - CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1)) - ).setParseAction(lambda t:t[0].strip())) - else: - raise ValueError("opening and closing arguments must be strings if no content expression is given") - ret = Forward() - if ignoreExpr is not None: - ret <<= Group( Suppress(opener) + ZeroOrMore( ignoreExpr | ret | content ) + Suppress(closer) ) - else: - ret <<= Group( Suppress(opener) + ZeroOrMore( ret | content ) + Suppress(closer) ) - ret.setName('nested %s%s expression' % (opener,closer)) - return ret - -def indentedBlock(blockStatementExpr, indentStack, indent=True): - """ - Helper method for defining space-delimited indentation blocks, such as - those used to define block statements in Python source code. - - Parameters: - - blockStatementExpr - expression defining syntax of statement that - is repeated within the indented block - - indentStack - list created by caller to manage indentation stack - (multiple statementWithIndentedBlock expressions within a single grammar - should share a common indentStack) - - indent - boolean indicating whether block must be indented beyond the - the current level; set to False for block of left-most statements - (default=C{True}) - - A valid block must contain at least one C{blockStatement}. - - Example:: - data = ''' - def A(z): - A1 - B = 100 - G = A2 - A2 - A3 - B - def BB(a,b,c): - BB1 - def BBA(): - bba1 - bba2 - bba3 - C - D - def spam(x,y): - def eggs(z): - pass - ''' - - - indentStack = [1] - stmt = Forward() - - identifier = Word(alphas, alphanums) - funcDecl = ("def" + identifier + Group( "(" + Optional( delimitedList(identifier) ) + ")" ) + ":") - func_body = indentedBlock(stmt, indentStack) - funcDef = Group( funcDecl + func_body ) - - rvalue = Forward() - funcCall = Group(identifier + "(" + Optional(delimitedList(rvalue)) + ")") - rvalue << (funcCall | identifier | Word(nums)) - assignment = Group(identifier + "=" + rvalue) - stmt << ( funcDef | assignment | identifier ) - - module_body = OneOrMore(stmt) - - parseTree = module_body.parseString(data) - parseTree.pprint() - prints:: - [['def', - 'A', - ['(', 'z', ')'], - ':', - [['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]], - 'B', - ['def', - 'BB', - ['(', 'a', 'b', 'c', ')'], - ':', - [['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]], - 'C', - 'D', - ['def', - 'spam', - ['(', 'x', 'y', ')'], - ':', - [[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]] - """ - def checkPeerIndent(s,l,t): - if l >= len(s): return - curCol = col(l,s) - if curCol != indentStack[-1]: - if curCol > indentStack[-1]: - raise ParseFatalException(s,l,"illegal nesting") - raise ParseException(s,l,"not a peer entry") - - def checkSubIndent(s,l,t): - curCol = col(l,s) - if curCol > indentStack[-1]: - indentStack.append( curCol ) - else: - raise ParseException(s,l,"not a subentry") - - def checkUnindent(s,l,t): - if l >= len(s): return - curCol = col(l,s) - if not(indentStack and curCol < indentStack[-1] and curCol <= indentStack[-2]): - raise ParseException(s,l,"not an unindent") - indentStack.pop() - - NL = OneOrMore(LineEnd().setWhitespaceChars("\t ").suppress()) - INDENT = (Empty() + Empty().setParseAction(checkSubIndent)).setName('INDENT') - PEER = Empty().setParseAction(checkPeerIndent).setName('') - UNDENT = Empty().setParseAction(checkUnindent).setName('UNINDENT') - if indent: - smExpr = Group( Optional(NL) + - #~ FollowedBy(blockStatementExpr) + - INDENT + (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) + UNDENT) - else: - smExpr = Group( Optional(NL) + - (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) ) - blockStatementExpr.ignore(_bslash + LineEnd()) - return smExpr.setName('indented block') - -alphas8bit = srange(r"[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]") -punc8bit = srange(r"[\0xa1-\0xbf\0xd7\0xf7]") - -anyOpenTag,anyCloseTag = makeHTMLTags(Word(alphas,alphanums+"_:").setName('any tag')) -_htmlEntityMap = dict(zip("gt lt amp nbsp quot apos".split(),'><& "\'')) -commonHTMLEntity = Regex('&(?P' + '|'.join(_htmlEntityMap.keys()) +");").setName("common HTML entity") -def replaceHTMLEntity(t): - """Helper parser action to replace common HTML entities with their special characters""" - return _htmlEntityMap.get(t.entity) - -# it's easy to get these comment structures wrong - they're very common, so may as well make them available -cStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/').setName("C style comment") -"Comment of the form C{/* ... */}" - -htmlComment = Regex(r"").setName("HTML comment") -"Comment of the form C{}" - -restOfLine = Regex(r".*").leaveWhitespace().setName("rest of line") -dblSlashComment = Regex(r"//(?:\\\n|[^\n])*").setName("// comment") -"Comment of the form C{// ... (to end of line)}" - -cppStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/'| dblSlashComment).setName("C++ style comment") -"Comment of either form C{L{cStyleComment}} or C{L{dblSlashComment}}" - -javaStyleComment = cppStyleComment -"Same as C{L{cppStyleComment}}" - -pythonStyleComment = Regex(r"#.*").setName("Python style comment") -"Comment of the form C{# ... (to end of line)}" - -_commasepitem = Combine(OneOrMore(Word(printables, excludeChars=',') + - Optional( Word(" \t") + - ~Literal(",") + ~LineEnd() ) ) ).streamline().setName("commaItem") -commaSeparatedList = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("commaSeparatedList") -"""(Deprecated) Predefined expression of 1 or more printable words or quoted strings, separated by commas. - This expression is deprecated in favor of L{pyparsing_common.comma_separated_list}.""" - -# some other useful expressions - using lower-case class name since we are really using this as a namespace -class pyparsing_common: - """ - Here are some common low-level expressions that may be useful in jump-starting parser development: - - numeric forms (L{integers}, L{reals}, L{scientific notation}) - - common L{programming identifiers} - - network addresses (L{MAC}, L{IPv4}, L{IPv6}) - - ISO8601 L{dates} and L{datetime} - - L{UUID} - - L{comma-separated list} - Parse actions: - - C{L{convertToInteger}} - - C{L{convertToFloat}} - - C{L{convertToDate}} - - C{L{convertToDatetime}} - - C{L{stripHTMLTags}} - - C{L{upcaseTokens}} - - C{L{downcaseTokens}} - - Example:: - pyparsing_common.number.runTests(''' - # any int or real number, returned as the appropriate type - 100 - -100 - +100 - 3.14159 - 6.02e23 - 1e-12 - ''') - - pyparsing_common.fnumber.runTests(''' - # any int or real number, returned as float - 100 - -100 - +100 - 3.14159 - 6.02e23 - 1e-12 - ''') - - pyparsing_common.hex_integer.runTests(''' - # hex numbers - 100 - FF - ''') - - pyparsing_common.fraction.runTests(''' - # fractions - 1/2 - -3/4 - ''') - - pyparsing_common.mixed_integer.runTests(''' - # mixed fractions - 1 - 1/2 - -3/4 - 1-3/4 - ''') - - import uuid - pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID)) - pyparsing_common.uuid.runTests(''' - # uuid - 12345678-1234-5678-1234-567812345678 - ''') - prints:: - # any int or real number, returned as the appropriate type - 100 - [100] - - -100 - [-100] - - +100 - [100] - - 3.14159 - [3.14159] - - 6.02e23 - [6.02e+23] - - 1e-12 - [1e-12] - - # any int or real number, returned as float - 100 - [100.0] - - -100 - [-100.0] - - +100 - [100.0] - - 3.14159 - [3.14159] - - 6.02e23 - [6.02e+23] - - 1e-12 - [1e-12] - - # hex numbers - 100 - [256] - - FF - [255] - - # fractions - 1/2 - [0.5] - - -3/4 - [-0.75] - - # mixed fractions - 1 - [1] - - 1/2 - [0.5] - - -3/4 - [-0.75] - - 1-3/4 - [1.75] - - # uuid - 12345678-1234-5678-1234-567812345678 - [UUID('12345678-1234-5678-1234-567812345678')] - """ - - convertToInteger = tokenMap(int) - """ - Parse action for converting parsed integers to Python int - """ - - convertToFloat = tokenMap(float) - """ - Parse action for converting parsed numbers to Python float - """ - - integer = Word(nums).setName("integer").setParseAction(convertToInteger) - """expression that parses an unsigned integer, returns an int""" - - hex_integer = Word(hexnums).setName("hex integer").setParseAction(tokenMap(int,16)) - """expression that parses a hexadecimal integer, returns an int""" - - signed_integer = Regex(r'[+-]?\d+').setName("signed integer").setParseAction(convertToInteger) - """expression that parses an integer with optional leading sign, returns an int""" - - fraction = (signed_integer().setParseAction(convertToFloat) + '/' + signed_integer().setParseAction(convertToFloat)).setName("fraction") - """fractional expression of an integer divided by an integer, returns a float""" - fraction.addParseAction(lambda t: t[0]/t[-1]) - - mixed_integer = (fraction | signed_integer + Optional(Optional('-').suppress() + fraction)).setName("fraction or mixed integer-fraction") - """mixed integer of the form 'integer - fraction', with optional leading integer, returns float""" - mixed_integer.addParseAction(sum) - - real = Regex(r'[+-]?\d+\.\d*').setName("real number").setParseAction(convertToFloat) - """expression that parses a floating point number and returns a float""" - - sci_real = Regex(r'[+-]?\d+([eE][+-]?\d+|\.\d*([eE][+-]?\d+)?)').setName("real number with scientific notation").setParseAction(convertToFloat) - """expression that parses a floating point number with optional scientific notation and returns a float""" - - # streamlining this expression makes the docs nicer-looking - number = (sci_real | real | signed_integer).streamline() - """any numeric expression, returns the corresponding Python type""" - - fnumber = Regex(r'[+-]?\d+\.?\d*([eE][+-]?\d+)?').setName("fnumber").setParseAction(convertToFloat) - """any int or real number, returned as float""" - - identifier = Word(alphas+'_', alphanums+'_').setName("identifier") - """typical code identifier (leading alpha or '_', followed by 0 or more alphas, nums, or '_')""" - - ipv4_address = Regex(r'(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}').setName("IPv4 address") - "IPv4 address (C{0.0.0.0 - 255.255.255.255})" - - _ipv6_part = Regex(r'[0-9a-fA-F]{1,4}').setName("hex_integer") - _full_ipv6_address = (_ipv6_part + (':' + _ipv6_part)*7).setName("full IPv6 address") - _short_ipv6_address = (Optional(_ipv6_part + (':' + _ipv6_part)*(0,6)) + "::" + Optional(_ipv6_part + (':' + _ipv6_part)*(0,6))).setName("short IPv6 address") - _short_ipv6_address.addCondition(lambda t: sum(1 for tt in t if pyparsing_common._ipv6_part.matches(tt)) < 8) - _mixed_ipv6_address = ("::ffff:" + ipv4_address).setName("mixed IPv6 address") - ipv6_address = Combine((_full_ipv6_address | _mixed_ipv6_address | _short_ipv6_address).setName("IPv6 address")).setName("IPv6 address") - "IPv6 address (long, short, or mixed form)" - - mac_address = Regex(r'[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}').setName("MAC address") - "MAC address xx:xx:xx:xx:xx (may also have '-' or '.' delimiters)" - - @staticmethod - def convertToDate(fmt="%Y-%m-%d"): - """ - Helper to create a parse action for converting parsed date string to Python datetime.date - - Params - - - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%d"}) - - Example:: - date_expr = pyparsing_common.iso8601_date.copy() - date_expr.setParseAction(pyparsing_common.convertToDate()) - print(date_expr.parseString("1999-12-31")) - prints:: - [datetime.date(1999, 12, 31)] - """ - def cvt_fn(s,l,t): - try: - return datetime.strptime(t[0], fmt).date() - except ValueError as ve: - raise ParseException(s, l, str(ve)) - return cvt_fn - - @staticmethod - def convertToDatetime(fmt="%Y-%m-%dT%H:%M:%S.%f"): - """ - Helper to create a parse action for converting parsed datetime string to Python datetime.datetime - - Params - - - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%dT%H:%M:%S.%f"}) - - Example:: - dt_expr = pyparsing_common.iso8601_datetime.copy() - dt_expr.setParseAction(pyparsing_common.convertToDatetime()) - print(dt_expr.parseString("1999-12-31T23:59:59.999")) - prints:: - [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)] - """ - def cvt_fn(s,l,t): - try: - return datetime.strptime(t[0], fmt) - except ValueError as ve: - raise ParseException(s, l, str(ve)) - return cvt_fn - - iso8601_date = Regex(r'(?P\d{4})(?:-(?P\d\d)(?:-(?P\d\d))?)?').setName("ISO8601 date") - "ISO8601 date (C{yyyy-mm-dd})" - - iso8601_datetime = Regex(r'(?P\d{4})-(?P\d\d)-(?P\d\d)[T ](?P\d\d):(?P\d\d)(:(?P\d\d(\.\d*)?)?)?(?PZ|[+-]\d\d:?\d\d)?').setName("ISO8601 datetime") - "ISO8601 datetime (C{yyyy-mm-ddThh:mm:ss.s(Z|+-00:00)}) - trailing seconds, milliseconds, and timezone optional; accepts separating C{'T'} or C{' '}" - - uuid = Regex(r'[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}').setName("UUID") - "UUID (C{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx})" - - _html_stripper = anyOpenTag.suppress() | anyCloseTag.suppress() - @staticmethod - def stripHTMLTags(s, l, tokens): - """ - Parse action to remove HTML tags from web page HTML source - - Example:: - # strip HTML links from normal text - text = 'More info at the pyparsing wiki page' - td,td_end = makeHTMLTags("TD") - table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end - - print(table_text.parseString(text).body) # -> 'More info at the pyparsing wiki page' - """ - return pyparsing_common._html_stripper.transformString(tokens[0]) - - _commasepitem = Combine(OneOrMore(~Literal(",") + ~LineEnd() + Word(printables, excludeChars=',') - + Optional( White(" \t") ) ) ).streamline().setName("commaItem") - comma_separated_list = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("comma separated list") - """Predefined expression of 1 or more printable words or quoted strings, separated by commas.""" - - upcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).upper())) - """Parse action to convert tokens to upper case.""" - - downcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).lower())) - """Parse action to convert tokens to lower case.""" - - -if __name__ == "__main__": - - selectToken = CaselessLiteral("select") - fromToken = CaselessLiteral("from") - - ident = Word(alphas, alphanums + "_$") - - columnName = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens) - columnNameList = Group(delimitedList(columnName)).setName("columns") - columnSpec = ('*' | columnNameList) - - tableName = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens) - tableNameList = Group(delimitedList(tableName)).setName("tables") - - simpleSQL = selectToken("command") + columnSpec("columns") + fromToken + tableNameList("tables") - - # demo runTests method, including embedded comments in test string - simpleSQL.runTests(""" - # '*' as column list and dotted table name - select * from SYS.XYZZY - - # caseless match on "SELECT", and casts back to "select" - SELECT * from XYZZY, ABC - - # list of column names, and mixed case SELECT keyword - Select AA,BB,CC from Sys.dual - - # multiple tables - Select A, B, C from Sys.dual, Table2 - - # invalid SELECT keyword - should fail - Xelect A, B, C from Sys.dual - - # incomplete command - should fail - Select - - # invalid column name - should fail - Select ^^^ frox Sys.dual - - """) - - pyparsing_common.number.runTests(""" - 100 - -100 - +100 - 3.14159 - 6.02e23 - 1e-12 - """) - - # any int or real number, returned as float - pyparsing_common.fnumber.runTests(""" - 100 - -100 - +100 - 3.14159 - 6.02e23 - 1e-12 - """) - - pyparsing_common.hex_integer.runTests(""" - 100 - FF - """) - - import uuid - pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID)) - pyparsing_common.uuid.runTests(""" - 12345678-1234-5678-1234-567812345678 - """) diff --git a/pkg_resources/_vendor/pyparsing/__init__.py b/pkg_resources/_vendor/pyparsing/__init__.py new file mode 100644 index 0000000..45f334d --- /dev/null +++ b/pkg_resources/_vendor/pyparsing/__init__.py @@ -0,0 +1,331 @@ +# module pyparsing.py +# +# Copyright (c) 2003-2022 Paul T. McGuire +# +# Permission is hereby granted, free of charge, to any person obtaining +# a copy of this software and associated documentation files (the +# "Software"), to deal in the Software without restriction, including +# without limitation the rights to use, copy, modify, merge, publish, +# distribute, sublicense, and/or sell copies of the Software, and to +# permit persons to whom the Software is furnished to do so, subject to +# the following conditions: +# +# The above copyright notice and this permission notice shall be +# included in all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +# + +__doc__ = """ +pyparsing module - Classes and methods to define and execute parsing grammars +============================================================================= + +The pyparsing module is an alternative approach to creating and +executing simple grammars, vs. the traditional lex/yacc approach, or the +use of regular expressions. With pyparsing, you don't need to learn +a new syntax for defining grammars or matching expressions - the parsing +module provides a library of classes that you use to construct the +grammar directly in Python. + +Here is a program to parse "Hello, World!" (or any greeting of the form +``", !"``), built up using :class:`Word`, +:class:`Literal`, and :class:`And` elements +(the :meth:`'+'` operators create :class:`And` expressions, +and the strings are auto-converted to :class:`Literal` expressions):: + + from pyparsing import Word, alphas + + # define grammar of a greeting + greet = Word(alphas) + "," + Word(alphas) + "!" + + hello = "Hello, World!" + print(hello, "->", greet.parse_string(hello)) + +The program outputs the following:: + + Hello, World! -> ['Hello', ',', 'World', '!'] + +The Python representation of the grammar is quite readable, owing to the +self-explanatory class names, and the use of :class:`'+'`, +:class:`'|'`, :class:`'^'` and :class:`'&'` operators. + +The :class:`ParseResults` object returned from +:class:`ParserElement.parseString` can be +accessed as a nested list, a dictionary, or an object with named +attributes. + +The pyparsing module handles some of the problems that are typically +vexing when writing text parsers: + + - extra or missing whitespace (the above program will also handle + "Hello,World!", "Hello , World !", etc.) + - quoted strings + - embedded comments + + +Getting Started - +----------------- +Visit the classes :class:`ParserElement` and :class:`ParseResults` to +see the base classes that most other pyparsing +classes inherit from. Use the docstrings for examples of how to: + + - construct literal match expressions from :class:`Literal` and + :class:`CaselessLiteral` classes + - construct character word-group expressions using the :class:`Word` + class + - see how to create repetitive expressions using :class:`ZeroOrMore` + and :class:`OneOrMore` classes + - use :class:`'+'`, :class:`'|'`, :class:`'^'`, + and :class:`'&'` operators to combine simple expressions into + more complex ones + - associate names with your parsed results using + :class:`ParserElement.setResultsName` + - access the parsed data, which is returned as a :class:`ParseResults` + object + - find some helpful expression short-cuts like :class:`delimitedList` + and :class:`oneOf` + - find more useful common expressions in the :class:`pyparsing_common` + namespace class +""" +from typing import NamedTuple + + +class version_info(NamedTuple): + major: int + minor: int + micro: int + releaselevel: str + serial: int + + @property + def __version__(self): + return ( + "{}.{}.{}".format(self.major, self.minor, self.micro) + + ( + "{}{}{}".format( + "r" if self.releaselevel[0] == "c" else "", + self.releaselevel[0], + self.serial, + ), + "", + )[self.releaselevel == "final"] + ) + + def __str__(self): + return "{} {} / {}".format(__name__, self.__version__, __version_time__) + + def __repr__(self): + return "{}.{}({})".format( + __name__, + type(self).__name__, + ", ".join("{}={!r}".format(*nv) for nv in zip(self._fields, self)), + ) + + +__version_info__ = version_info(3, 0, 8, "final", 0) +__version_time__ = "09 Apr 2022 23:29 UTC" +__version__ = __version_info__.__version__ +__versionTime__ = __version_time__ +__author__ = "Paul McGuire " + +from .util import * +from .exceptions import * +from .actions import * +from .core import __diag__, __compat__ +from .results import * +from .core import * +from .core import _builtin_exprs as core_builtin_exprs +from .helpers import * +from .helpers import _builtin_exprs as helper_builtin_exprs + +from .unicode import unicode_set, UnicodeRangeList, pyparsing_unicode as unicode +from .testing import pyparsing_test as testing +from .common import ( + pyparsing_common as common, + _builtin_exprs as common_builtin_exprs, +) + +# define backward compat synonyms +if "pyparsing_unicode" not in globals(): + pyparsing_unicode = unicode +if "pyparsing_common" not in globals(): + pyparsing_common = common +if "pyparsing_test" not in globals(): + pyparsing_test = testing + +core_builtin_exprs += common_builtin_exprs + helper_builtin_exprs + + +__all__ = [ + "__version__", + "__version_time__", + "__author__", + "__compat__", + "__diag__", + "And", + "AtLineStart", + "AtStringStart", + "CaselessKeyword", + "CaselessLiteral", + "CharsNotIn", + "Combine", + "Dict", + "Each", + "Empty", + "FollowedBy", + "Forward", + "GoToColumn", + "Group", + "IndentedBlock", + "Keyword", + "LineEnd", + "LineStart", + "Literal", + "Located", + "PrecededBy", + "MatchFirst", + "NoMatch", + "NotAny", + "OneOrMore", + "OnlyOnce", + "OpAssoc", + "Opt", + "Optional", + "Or", + "ParseBaseException", + "ParseElementEnhance", + "ParseException", + "ParseExpression", + "ParseFatalException", + "ParseResults", + "ParseSyntaxException", + "ParserElement", + "PositionToken", + "QuotedString", + "RecursiveGrammarException", + "Regex", + "SkipTo", + "StringEnd", + "StringStart", + "Suppress", + "Token", + "TokenConverter", + "White", + "Word", + "WordEnd", + "WordStart", + "ZeroOrMore", + "Char", + "alphanums", + "alphas", + "alphas8bit", + "any_close_tag", + "any_open_tag", + "c_style_comment", + "col", + "common_html_entity", + "counted_array", + "cpp_style_comment", + "dbl_quoted_string", + "dbl_slash_comment", + "delimited_list", + "dict_of", + "empty", + "hexnums", + "html_comment", + "identchars", + "identbodychars", + "java_style_comment", + "line", + "line_end", + "line_start", + "lineno", + "make_html_tags", + "make_xml_tags", + "match_only_at_col", + "match_previous_expr", + "match_previous_literal", + "nested_expr", + "null_debug_action", + "nums", + "one_of", + "printables", + "punc8bit", + "python_style_comment", + "quoted_string", + "remove_quotes", + "replace_with", + "replace_html_entity", + "rest_of_line", + "sgl_quoted_string", + "srange", + "string_end", + "string_start", + "trace_parse_action", + "unicode_string", + "with_attribute", + "indentedBlock", + "original_text_for", + "ungroup", + "infix_notation", + "locatedExpr", + "with_class", + "CloseMatch", + "token_map", + "pyparsing_common", + "pyparsing_unicode", + "unicode_set", + "condition_as_parse_action", + "pyparsing_test", + # pre-PEP8 compatibility names + "__versionTime__", + "anyCloseTag", + "anyOpenTag", + "cStyleComment", + "commonHTMLEntity", + "countedArray", + "cppStyleComment", + "dblQuotedString", + "dblSlashComment", + "delimitedList", + "dictOf", + "htmlComment", + "javaStyleComment", + "lineEnd", + "lineStart", + "makeHTMLTags", + "makeXMLTags", + "matchOnlyAtCol", + "matchPreviousExpr", + "matchPreviousLiteral", + "nestedExpr", + "nullDebugAction", + "oneOf", + "opAssoc", + "pythonStyleComment", + "quotedString", + "removeQuotes", + "replaceHTMLEntity", + "replaceWith", + "restOfLine", + "sglQuotedString", + "stringEnd", + "stringStart", + "traceParseAction", + "unicodeString", + "withAttribute", + "indentedBlock", + "originalTextFor", + "infixNotation", + "locatedExpr", + "withClass", + "tokenMap", + "conditionAsParseAction", + "autoname_elements", +] diff --git a/pkg_resources/_vendor/pyparsing/actions.py b/pkg_resources/_vendor/pyparsing/actions.py new file mode 100644 index 0000000..2bcc550 --- /dev/null +++ b/pkg_resources/_vendor/pyparsing/actions.py @@ -0,0 +1,207 @@ +# actions.py + +from .exceptions import ParseException +from .util import col + + +class OnlyOnce: + """ + Wrapper for parse actions, to ensure they are only called once. + """ + + def __init__(self, method_call): + from .core import _trim_arity + + self.callable = _trim_arity(method_call) + self.called = False + + def __call__(self, s, l, t): + if not self.called: + results = self.callable(s, l, t) + self.called = True + return results + raise ParseException(s, l, "OnlyOnce obj called multiple times w/out reset") + + def reset(self): + """ + Allow the associated parse action to be called once more. + """ + + self.called = False + + +def match_only_at_col(n): + """ + Helper method for defining parse actions that require matching at + a specific column in the input text. + """ + + def verify_col(strg, locn, toks): + if col(locn, strg) != n: + raise ParseException(strg, locn, "matched token not at column {}".format(n)) + + return verify_col + + +def replace_with(repl_str): + """ + Helper method for common parse actions that simply return + a literal value. Especially useful when used with + :class:`transform_string` (). + + Example:: + + num = Word(nums).set_parse_action(lambda toks: int(toks[0])) + na = one_of("N/A NA").set_parse_action(replace_with(math.nan)) + term = na | num + + OneOrMore(term).parse_string("324 234 N/A 234") # -> [324, 234, nan, 234] + """ + return lambda s, l, t: [repl_str] + + +def remove_quotes(s, l, t): + """ + Helper parse action for removing quotation marks from parsed + quoted strings. + + Example:: + + # by default, quotation marks are included in parsed results + quoted_string.parse_string("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"] + + # use remove_quotes to strip quotation marks from parsed results + quoted_string.set_parse_action(remove_quotes) + quoted_string.parse_string("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"] + """ + return t[0][1:-1] + + +def with_attribute(*args, **attr_dict): + """ + Helper to create a validating parse action to be used with start + tags created with :class:`make_xml_tags` or + :class:`make_html_tags`. Use ``with_attribute`` to qualify + a starting tag with a required attribute value, to avoid false + matches on common tags such as ```` or ``
``. + + Call ``with_attribute`` with a series of attribute names and + values. Specify the list of filter attributes names and values as: + + - keyword arguments, as in ``(align="right")``, or + - as an explicit dict with ``**`` operator, when an attribute + name is also a Python reserved word, as in ``**{"class":"Customer", "align":"right"}`` + - a list of name-value tuples, as in ``(("ns1:class", "Customer"), ("ns2:align", "right"))`` + + For attribute names with a namespace prefix, you must use the second + form. Attribute names are matched insensitive to upper/lower case. + + If just testing for ``class`` (with or without a namespace), use + :class:`with_class`. + + To verify that the attribute exists, but without specifying a value, + pass ``with_attribute.ANY_VALUE`` as the value. + + Example:: + + html = ''' +
+ Some text +
1 4 0 1 0
+
1,3 2,3 1,1
+
this has no type
+
+ + ''' + div,div_end = make_html_tags("div") + + # only match div tag having a type attribute with value "grid" + div_grid = div().set_parse_action(with_attribute(type="grid")) + grid_expr = div_grid + SkipTo(div | div_end)("body") + for grid_header in grid_expr.search_string(html): + print(grid_header.body) + + # construct a match with any div tag having a type attribute, regardless of the value + div_any_type = div().set_parse_action(with_attribute(type=with_attribute.ANY_VALUE)) + div_expr = div_any_type + SkipTo(div | div_end)("body") + for div_header in div_expr.search_string(html): + print(div_header.body) + + prints:: + + 1 4 0 1 0 + + 1 4 0 1 0 + 1,3 2,3 1,1 + """ + if args: + attrs = args[:] + else: + attrs = attr_dict.items() + attrs = [(k, v) for k, v in attrs] + + def pa(s, l, tokens): + for attrName, attrValue in attrs: + if attrName not in tokens: + raise ParseException(s, l, "no matching attribute " + attrName) + if attrValue != with_attribute.ANY_VALUE and tokens[attrName] != attrValue: + raise ParseException( + s, + l, + "attribute {!r} has value {!r}, must be {!r}".format( + attrName, tokens[attrName], attrValue + ), + ) + + return pa + + +with_attribute.ANY_VALUE = object() + + +def with_class(classname, namespace=""): + """ + Simplified version of :class:`with_attribute` when + matching on a div class - made difficult because ``class`` is + a reserved word in Python. + + Example:: + + html = ''' +
+ Some text +
1 4 0 1 0
+
1,3 2,3 1,1
+
this <div> has no class
+
+ + ''' + div,div_end = make_html_tags("div") + div_grid = div().set_parse_action(with_class("grid")) + + grid_expr = div_grid + SkipTo(div | div_end)("body") + for grid_header in grid_expr.search_string(html): + print(grid_header.body) + + div_any_type = div().set_parse_action(with_class(withAttribute.ANY_VALUE)) + div_expr = div_any_type + SkipTo(div | div_end)("body") + for div_header in div_expr.search_string(html): + print(div_header.body) + + prints:: + + 1 4 0 1 0 + + 1 4 0 1 0 + 1,3 2,3 1,1 + """ + classattr = "{}:class".format(namespace) if namespace else "class" + return with_attribute(**{classattr: classname}) + + +# pre-PEP8 compatibility symbols +replaceWith = replace_with +removeQuotes = remove_quotes +withAttribute = with_attribute +withClass = with_class +matchOnlyAtCol = match_only_at_col diff --git a/pkg_resources/_vendor/pyparsing/common.py b/pkg_resources/_vendor/pyparsing/common.py new file mode 100644 index 0000000..1859fb7 --- /dev/null +++ b/pkg_resources/_vendor/pyparsing/common.py @@ -0,0 +1,424 @@ +# common.py +from .core import * +from .helpers import delimited_list, any_open_tag, any_close_tag +from datetime import datetime + + +# some other useful expressions - using lower-case class name since we are really using this as a namespace +class pyparsing_common: + """Here are some common low-level expressions that may be useful in + jump-starting parser development: + + - numeric forms (:class:`integers`, :class:`reals`, + :class:`scientific notation`) + - common :class:`programming identifiers` + - network addresses (:class:`MAC`, + :class:`IPv4`, :class:`IPv6`) + - ISO8601 :class:`dates` and + :class:`datetime` + - :class:`UUID` + - :class:`comma-separated list` + - :class:`url` + + Parse actions: + + - :class:`convertToInteger` + - :class:`convertToFloat` + - :class:`convertToDate` + - :class:`convertToDatetime` + - :class:`stripHTMLTags` + - :class:`upcaseTokens` + - :class:`downcaseTokens` + + Example:: + + pyparsing_common.number.runTests(''' + # any int or real number, returned as the appropriate type + 100 + -100 + +100 + 3.14159 + 6.02e23 + 1e-12 + ''') + + pyparsing_common.fnumber.runTests(''' + # any int or real number, returned as float + 100 + -100 + +100 + 3.14159 + 6.02e23 + 1e-12 + ''') + + pyparsing_common.hex_integer.runTests(''' + # hex numbers + 100 + FF + ''') + + pyparsing_common.fraction.runTests(''' + # fractions + 1/2 + -3/4 + ''') + + pyparsing_common.mixed_integer.runTests(''' + # mixed fractions + 1 + 1/2 + -3/4 + 1-3/4 + ''') + + import uuid + pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID)) + pyparsing_common.uuid.runTests(''' + # uuid + 12345678-1234-5678-1234-567812345678 + ''') + + prints:: + + # any int or real number, returned as the appropriate type + 100 + [100] + + -100 + [-100] + + +100 + [100] + + 3.14159 + [3.14159] + + 6.02e23 + [6.02e+23] + + 1e-12 + [1e-12] + + # any int or real number, returned as float + 100 + [100.0] + + -100 + [-100.0] + + +100 + [100.0] + + 3.14159 + [3.14159] + + 6.02e23 + [6.02e+23] + + 1e-12 + [1e-12] + + # hex numbers + 100 + [256] + + FF + [255] + + # fractions + 1/2 + [0.5] + + -3/4 + [-0.75] + + # mixed fractions + 1 + [1] + + 1/2 + [0.5] + + -3/4 + [-0.75] + + 1-3/4 + [1.75] + + # uuid + 12345678-1234-5678-1234-567812345678 + [UUID('12345678-1234-5678-1234-567812345678')] + """ + + convert_to_integer = token_map(int) + """ + Parse action for converting parsed integers to Python int + """ + + convert_to_float = token_map(float) + """ + Parse action for converting parsed numbers to Python float + """ + + integer = Word(nums).set_name("integer").set_parse_action(convert_to_integer) + """expression that parses an unsigned integer, returns an int""" + + hex_integer = ( + Word(hexnums).set_name("hex integer").set_parse_action(token_map(int, 16)) + ) + """expression that parses a hexadecimal integer, returns an int""" + + signed_integer = ( + Regex(r"[+-]?\d+") + .set_name("signed integer") + .set_parse_action(convert_to_integer) + ) + """expression that parses an integer with optional leading sign, returns an int""" + + fraction = ( + signed_integer().set_parse_action(convert_to_float) + + "/" + + signed_integer().set_parse_action(convert_to_float) + ).set_name("fraction") + """fractional expression of an integer divided by an integer, returns a float""" + fraction.add_parse_action(lambda tt: tt[0] / tt[-1]) + + mixed_integer = ( + fraction | signed_integer + Opt(Opt("-").suppress() + fraction) + ).set_name("fraction or mixed integer-fraction") + """mixed integer of the form 'integer - fraction', with optional leading integer, returns float""" + mixed_integer.add_parse_action(sum) + + real = ( + Regex(r"[+-]?(?:\d+\.\d*|\.\d+)") + .set_name("real number") + .set_parse_action(convert_to_float) + ) + """expression that parses a floating point number and returns a float""" + + sci_real = ( + Regex(r"[+-]?(?:\d+(?:[eE][+-]?\d+)|(?:\d+\.\d*|\.\d+)(?:[eE][+-]?\d+)?)") + .set_name("real number with scientific notation") + .set_parse_action(convert_to_float) + ) + """expression that parses a floating point number with optional + scientific notation and returns a float""" + + # streamlining this expression makes the docs nicer-looking + number = (sci_real | real | signed_integer).setName("number").streamline() + """any numeric expression, returns the corresponding Python type""" + + fnumber = ( + Regex(r"[+-]?\d+\.?\d*([eE][+-]?\d+)?") + .set_name("fnumber") + .set_parse_action(convert_to_float) + ) + """any int or real number, returned as float""" + + identifier = Word(identchars, identbodychars).set_name("identifier") + """typical code identifier (leading alpha or '_', followed by 0 or more alphas, nums, or '_')""" + + ipv4_address = Regex( + r"(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}" + ).set_name("IPv4 address") + "IPv4 address (``0.0.0.0 - 255.255.255.255``)" + + _ipv6_part = Regex(r"[0-9a-fA-F]{1,4}").set_name("hex_integer") + _full_ipv6_address = (_ipv6_part + (":" + _ipv6_part) * 7).set_name( + "full IPv6 address" + ) + _short_ipv6_address = ( + Opt(_ipv6_part + (":" + _ipv6_part) * (0, 6)) + + "::" + + Opt(_ipv6_part + (":" + _ipv6_part) * (0, 6)) + ).set_name("short IPv6 address") + _short_ipv6_address.add_condition( + lambda t: sum(1 for tt in t if pyparsing_common._ipv6_part.matches(tt)) < 8 + ) + _mixed_ipv6_address = ("::ffff:" + ipv4_address).set_name("mixed IPv6 address") + ipv6_address = Combine( + (_full_ipv6_address | _mixed_ipv6_address | _short_ipv6_address).set_name( + "IPv6 address" + ) + ).set_name("IPv6 address") + "IPv6 address (long, short, or mixed form)" + + mac_address = Regex( + r"[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}" + ).set_name("MAC address") + "MAC address xx:xx:xx:xx:xx (may also have '-' or '.' delimiters)" + + @staticmethod + def convert_to_date(fmt: str = "%Y-%m-%d"): + """ + Helper to create a parse action for converting parsed date string to Python datetime.date + + Params - + - fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%d"``) + + Example:: + + date_expr = pyparsing_common.iso8601_date.copy() + date_expr.setParseAction(pyparsing_common.convertToDate()) + print(date_expr.parseString("1999-12-31")) + + prints:: + + [datetime.date(1999, 12, 31)] + """ + + def cvt_fn(ss, ll, tt): + try: + return datetime.strptime(tt[0], fmt).date() + except ValueError as ve: + raise ParseException(ss, ll, str(ve)) + + return cvt_fn + + @staticmethod + def convert_to_datetime(fmt: str = "%Y-%m-%dT%H:%M:%S.%f"): + """Helper to create a parse action for converting parsed + datetime string to Python datetime.datetime + + Params - + - fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%dT%H:%M:%S.%f"``) + + Example:: + + dt_expr = pyparsing_common.iso8601_datetime.copy() + dt_expr.setParseAction(pyparsing_common.convertToDatetime()) + print(dt_expr.parseString("1999-12-31T23:59:59.999")) + + prints:: + + [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)] + """ + + def cvt_fn(s, l, t): + try: + return datetime.strptime(t[0], fmt) + except ValueError as ve: + raise ParseException(s, l, str(ve)) + + return cvt_fn + + iso8601_date = Regex( + r"(?P\d{4})(?:-(?P\d\d)(?:-(?P\d\d))?)?" + ).set_name("ISO8601 date") + "ISO8601 date (``yyyy-mm-dd``)" + + iso8601_datetime = Regex( + r"(?P\d{4})-(?P\d\d)-(?P\d\d)[T ](?P\d\d):(?P\d\d)(:(?P\d\d(\.\d*)?)?)?(?PZ|[+-]\d\d:?\d\d)?" + ).set_name("ISO8601 datetime") + "ISO8601 datetime (``yyyy-mm-ddThh:mm:ss.s(Z|+-00:00)``) - trailing seconds, milliseconds, and timezone optional; accepts separating ``'T'`` or ``' '``" + + uuid = Regex(r"[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}").set_name("UUID") + "UUID (``xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx``)" + + _html_stripper = any_open_tag.suppress() | any_close_tag.suppress() + + @staticmethod + def strip_html_tags(s: str, l: int, tokens: ParseResults): + """Parse action to remove HTML tags from web page HTML source + + Example:: + + # strip HTML links from normal text + text = 'More info at the pyparsing wiki page' + td, td_end = makeHTMLTags("TD") + table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end + print(table_text.parseString(text).body) + + Prints:: + + More info at the pyparsing wiki page + """ + return pyparsing_common._html_stripper.transform_string(tokens[0]) + + _commasepitem = ( + Combine( + OneOrMore( + ~Literal(",") + + ~LineEnd() + + Word(printables, exclude_chars=",") + + Opt(White(" \t") + ~FollowedBy(LineEnd() | ",")) + ) + ) + .streamline() + .set_name("commaItem") + ) + comma_separated_list = delimited_list( + Opt(quoted_string.copy() | _commasepitem, default="") + ).set_name("comma separated list") + """Predefined expression of 1 or more printable words or quoted strings, separated by commas.""" + + upcase_tokens = staticmethod(token_map(lambda t: t.upper())) + """Parse action to convert tokens to upper case.""" + + downcase_tokens = staticmethod(token_map(lambda t: t.lower())) + """Parse action to convert tokens to lower case.""" + + # fmt: off + url = Regex( + # https://mathiasbynens.be/demo/url-regex + # https://gist.github.com/dperini/729294 + r"^" + + # protocol identifier (optional) + # short syntax // still required + r"(?:(?:(?Phttps?|ftp):)?\/\/)" + + # user:pass BasicAuth (optional) + r"(?:(?P\S+(?::\S*)?)@)?" + + r"(?P" + + # IP address exclusion + # private & local networks + r"(?!(?:10|127)(?:\.\d{1,3}){3})" + + r"(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})" + + r"(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})" + + # IP address dotted notation octets + # excludes loopback network 0.0.0.0 + # excludes reserved space >= 224.0.0.0 + # excludes network & broadcast addresses + # (first & last IP address of each class) + r"(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])" + + r"(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}" + + r"(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))" + + r"|" + + # host & domain names, may end with dot + # can be replaced by a shortest alternative + # (?![-_])(?:[-\w\u00a1-\uffff]{0,63}[^-_]\.)+ + r"(?:" + + r"(?:" + + r"[a-z0-9\u00a1-\uffff]" + + r"[a-z0-9\u00a1-\uffff_-]{0,62}" + + r")?" + + r"[a-z0-9\u00a1-\uffff]\." + + r")+" + + # TLD identifier name, may end with dot + r"(?:[a-z\u00a1-\uffff]{2,}\.?)" + + r")" + + # port number (optional) + r"(:(?P\d{2,5}))?" + + # resource path (optional) + r"(?P\/[^?# ]*)?" + + # query string (optional) + r"(\?(?P[^#]*))?" + + # fragment (optional) + r"(#(?P\S*))?" + + r"$" + ).set_name("url") + # fmt: on + + # pre-PEP8 compatibility names + convertToInteger = convert_to_integer + convertToFloat = convert_to_float + convertToDate = convert_to_date + convertToDatetime = convert_to_datetime + stripHTMLTags = strip_html_tags + upcaseTokens = upcase_tokens + downcaseTokens = downcase_tokens + + +_builtin_exprs = [ + v for v in vars(pyparsing_common).values() if isinstance(v, ParserElement) +] diff --git a/pkg_resources/_vendor/pyparsing/core.py b/pkg_resources/_vendor/pyparsing/core.py new file mode 100644 index 0000000..454bd57 --- /dev/null +++ b/pkg_resources/_vendor/pyparsing/core.py @@ -0,0 +1,5812 @@ +# +# core.py +# +import os +from typing import ( + Optional as OptionalType, + Iterable as IterableType, + NamedTuple, + Union, + Callable, + Any, + Generator, + Tuple, + List, + TextIO, + Set, + Dict as DictType, + Sequence, +) +from abc import ABC, abstractmethod +from enum import Enum +import string +import copy +import warnings +import re +import sys +from collections.abc import Iterable +import traceback +import types +from operator import itemgetter +from functools import wraps +from threading import RLock +from pathlib import Path + +from .util import ( + _FifoCache, + _UnboundedCache, + __config_flags, + _collapse_string_to_ranges, + _escape_regex_range_chars, + _bslash, + _flatten, + LRUMemo as _LRUMemo, + UnboundedMemo as _UnboundedMemo, +) +from .exceptions import * +from .actions import * +from .results import ParseResults, _ParseResultsWithOffset +from .unicode import pyparsing_unicode + +_MAX_INT = sys.maxsize +str_type: Tuple[type, ...] = (str, bytes) + +# +# Copyright (c) 2003-2022 Paul T. McGuire +# +# Permission is hereby granted, free of charge, to any person obtaining +# a copy of this software and associated documentation files (the +# "Software"), to deal in the Software without restriction, including +# without limitation the rights to use, copy, modify, merge, publish, +# distribute, sublicense, and/or sell copies of the Software, and to +# permit persons to whom the Software is furnished to do so, subject to +# the following conditions: +# +# The above copyright notice and this permission notice shall be +# included in all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +# + + +if sys.version_info >= (3, 8): + from functools import cached_property +else: + + class cached_property: + def __init__(self, func): + self._func = func + + def __get__(self, instance, owner=None): + ret = instance.__dict__[self._func.__name__] = self._func(instance) + return ret + + +class __compat__(__config_flags): + """ + A cross-version compatibility configuration for pyparsing features that will be + released in a future version. By setting values in this configuration to True, + those features can be enabled in prior versions for compatibility development + and testing. + + - ``collect_all_And_tokens`` - flag to enable fix for Issue #63 that fixes erroneous grouping + of results names when an :class:`And` expression is nested within an :class:`Or` or :class:`MatchFirst`; + maintained for compatibility, but setting to ``False`` no longer restores pre-2.3.1 + behavior + """ + + _type_desc = "compatibility" + + collect_all_And_tokens = True + + _all_names = [__ for __ in locals() if not __.startswith("_")] + _fixed_names = """ + collect_all_And_tokens + """.split() + + +class __diag__(__config_flags): + _type_desc = "diagnostic" + + warn_multiple_tokens_in_named_alternation = False + warn_ungrouped_named_tokens_in_collection = False + warn_name_set_on_empty_Forward = False + warn_on_parse_using_empty_Forward = False + warn_on_assignment_to_Forward = False + warn_on_multiple_string_args_to_oneof = False + warn_on_match_first_with_lshift_operator = False + enable_debug_on_named_expressions = False + + _all_names = [__ for __ in locals() if not __.startswith("_")] + _warning_names = [name for name in _all_names if name.startswith("warn")] + _debug_names = [name for name in _all_names if name.startswith("enable_debug")] + + @classmethod + def enable_all_warnings(cls) -> None: + for name in cls._warning_names: + cls.enable(name) + + +class Diagnostics(Enum): + """ + Diagnostic configuration (all default to disabled) + - ``warn_multiple_tokens_in_named_alternation`` - flag to enable warnings when a results + name is defined on a :class:`MatchFirst` or :class:`Or` expression with one or more :class:`And` subexpressions + - ``warn_ungrouped_named_tokens_in_collection`` - flag to enable warnings when a results + name is defined on a containing expression with ungrouped subexpressions that also + have results names + - ``warn_name_set_on_empty_Forward`` - flag to enable warnings when a :class:`Forward` is defined + with a results name, but has no contents defined + - ``warn_on_parse_using_empty_Forward`` - flag to enable warnings when a :class:`Forward` is + defined in a grammar but has never had an expression attached to it + - ``warn_on_assignment_to_Forward`` - flag to enable warnings when a :class:`Forward` is defined + but is overwritten by assigning using ``'='`` instead of ``'<<='`` or ``'<<'`` + - ``warn_on_multiple_string_args_to_oneof`` - flag to enable warnings when :class:`one_of` is + incorrectly called with multiple str arguments + - ``enable_debug_on_named_expressions`` - flag to auto-enable debug on all subsequent + calls to :class:`ParserElement.set_name` + + Diagnostics are enabled/disabled by calling :class:`enable_diag` and :class:`disable_diag`. + All warnings can be enabled by calling :class:`enable_all_warnings`. + """ + + warn_multiple_tokens_in_named_alternation = 0 + warn_ungrouped_named_tokens_in_collection = 1 + warn_name_set_on_empty_Forward = 2 + warn_on_parse_using_empty_Forward = 3 + warn_on_assignment_to_Forward = 4 + warn_on_multiple_string_args_to_oneof = 5 + warn_on_match_first_with_lshift_operator = 6 + enable_debug_on_named_expressions = 7 + + +def enable_diag(diag_enum: Diagnostics) -> None: + """ + Enable a global pyparsing diagnostic flag (see :class:`Diagnostics`). + """ + __diag__.enable(diag_enum.name) + + +def disable_diag(diag_enum: Diagnostics) -> None: + """ + Disable a global pyparsing diagnostic flag (see :class:`Diagnostics`). + """ + __diag__.disable(diag_enum.name) + + +def enable_all_warnings() -> None: + """ + Enable all global pyparsing diagnostic warnings (see :class:`Diagnostics`). + """ + __diag__.enable_all_warnings() + + +# hide abstract class +del __config_flags + + +def _should_enable_warnings( + cmd_line_warn_options: IterableType[str], warn_env_var: OptionalType[str] +) -> bool: + enable = bool(warn_env_var) + for warn_opt in cmd_line_warn_options: + w_action, w_message, w_category, w_module, w_line = (warn_opt + "::::").split( + ":" + )[:5] + if not w_action.lower().startswith("i") and ( + not (w_message or w_category or w_module) or w_module == "pyparsing" + ): + enable = True + elif w_action.lower().startswith("i") and w_module in ("pyparsing", ""): + enable = False + return enable + + +if _should_enable_warnings( + sys.warnoptions, os.environ.get("PYPARSINGENABLEALLWARNINGS") +): + enable_all_warnings() + + +# build list of single arg builtins, that can be used as parse actions +_single_arg_builtins = { + sum, + len, + sorted, + reversed, + list, + tuple, + set, + any, + all, + min, + max, +} + +_generatorType = types.GeneratorType +ParseAction = Union[ + Callable[[], Any], + Callable[[ParseResults], Any], + Callable[[int, ParseResults], Any], + Callable[[str, int, ParseResults], Any], +] +ParseCondition = Union[ + Callable[[], bool], + Callable[[ParseResults], bool], + Callable[[int, ParseResults], bool], + Callable[[str, int, ParseResults], bool], +] +ParseFailAction = Callable[[str, int, "ParserElement", Exception], None] +DebugStartAction = Callable[[str, int, "ParserElement", bool], None] +DebugSuccessAction = Callable[ + [str, int, int, "ParserElement", ParseResults, bool], None +] +DebugExceptionAction = Callable[[str, int, "ParserElement", Exception, bool], None] + + +alphas = string.ascii_uppercase + string.ascii_lowercase +identchars = pyparsing_unicode.Latin1.identchars +identbodychars = pyparsing_unicode.Latin1.identbodychars +nums = "0123456789" +hexnums = nums + "ABCDEFabcdef" +alphanums = alphas + nums +printables = "".join([c for c in string.printable if c not in string.whitespace]) + +_trim_arity_call_line: traceback.StackSummary = None + + +def _trim_arity(func, max_limit=3): + """decorator to trim function calls to match the arity of the target""" + global _trim_arity_call_line + + if func in _single_arg_builtins: + return lambda s, l, t: func(t) + + limit = 0 + found_arity = False + + def extract_tb(tb, limit=0): + frames = traceback.extract_tb(tb, limit=limit) + frame_summary = frames[-1] + return [frame_summary[:2]] + + # synthesize what would be returned by traceback.extract_stack at the call to + # user's parse action 'func', so that we don't incur call penalty at parse time + + # fmt: off + LINE_DIFF = 7 + # IF ANY CODE CHANGES, EVEN JUST COMMENTS OR BLANK LINES, BETWEEN THE NEXT LINE AND + # THE CALL TO FUNC INSIDE WRAPPER, LINE_DIFF MUST BE MODIFIED!!!! + _trim_arity_call_line = (_trim_arity_call_line or traceback.extract_stack(limit=2)[-1]) + pa_call_line_synth = (_trim_arity_call_line[0], _trim_arity_call_line[1] + LINE_DIFF) + + def wrapper(*args): + nonlocal found_arity, limit + while 1: + try: + ret = func(*args[limit:]) + found_arity = True + return ret + except TypeError as te: + # re-raise TypeErrors if they did not come from our arity testing + if found_arity: + raise + else: + tb = te.__traceback__ + trim_arity_type_error = ( + extract_tb(tb, limit=2)[-1][:2] == pa_call_line_synth + ) + del tb + + if trim_arity_type_error: + if limit < max_limit: + limit += 1 + continue + + raise + # fmt: on + + # copy func name to wrapper for sensible debug output + # (can't use functools.wraps, since that messes with function signature) + func_name = getattr(func, "__name__", getattr(func, "__class__").__name__) + wrapper.__name__ = func_name + wrapper.__doc__ = func.__doc__ + + return wrapper + + +def condition_as_parse_action( + fn: ParseCondition, message: str = None, fatal: bool = False +) -> ParseAction: + """ + Function to convert a simple predicate function that returns ``True`` or ``False`` + into a parse action. Can be used in places when a parse action is required + and :class:`ParserElement.add_condition` cannot be used (such as when adding a condition + to an operator level in :class:`infix_notation`). + + Optional keyword arguments: + + - ``message`` - define a custom message to be used in the raised exception + - ``fatal`` - if True, will raise :class:`ParseFatalException` to stop parsing immediately; + otherwise will raise :class:`ParseException` + + """ + msg = message if message is not None else "failed user-defined condition" + exc_type = ParseFatalException if fatal else ParseException + fn = _trim_arity(fn) + + @wraps(fn) + def pa(s, l, t): + if not bool(fn(s, l, t)): + raise exc_type(s, l, msg) + + return pa + + +def _default_start_debug_action( + instring: str, loc: int, expr: "ParserElement", cache_hit: bool = False +): + cache_hit_str = "*" if cache_hit else "" + print( + ( + "{}Match {} at loc {}({},{})\n {}\n {}^".format( + cache_hit_str, + expr, + loc, + lineno(loc, instring), + col(loc, instring), + line(loc, instring), + " " * (col(loc, instring) - 1), + ) + ) + ) + + +def _default_success_debug_action( + instring: str, + startloc: int, + endloc: int, + expr: "ParserElement", + toks: ParseResults, + cache_hit: bool = False, +): + cache_hit_str = "*" if cache_hit else "" + print("{}Matched {} -> {}".format(cache_hit_str, expr, toks.as_list())) + + +def _default_exception_debug_action( + instring: str, + loc: int, + expr: "ParserElement", + exc: Exception, + cache_hit: bool = False, +): + cache_hit_str = "*" if cache_hit else "" + print( + "{}Match {} failed, {} raised: {}".format( + cache_hit_str, expr, type(exc).__name__, exc + ) + ) + + +def null_debug_action(*args): + """'Do-nothing' debug action, to suppress debugging output during parsing.""" + + +class ParserElement(ABC): + """Abstract base level parser element class.""" + + DEFAULT_WHITE_CHARS: str = " \n\t\r" + verbose_stacktrace: bool = False + _literalStringClass: OptionalType[type] = None + + @staticmethod + def set_default_whitespace_chars(chars: str) -> None: + r""" + Overrides the default whitespace chars + + Example:: + + # default whitespace chars are space, and newline + OneOrMore(Word(alphas)).parse_string("abc def\nghi jkl") # -> ['abc', 'def', 'ghi', 'jkl'] + + # change to just treat newline as significant + ParserElement.set_default_whitespace_chars(" \t") + OneOrMore(Word(alphas)).parse_string("abc def\nghi jkl") # -> ['abc', 'def'] + """ + ParserElement.DEFAULT_WHITE_CHARS = chars + + # update whitespace all parse expressions defined in this module + for expr in _builtin_exprs: + if expr.copyDefaultWhiteChars: + expr.whiteChars = set(chars) + + @staticmethod + def inline_literals_using(cls: type) -> None: + """ + Set class to be used for inclusion of string literals into a parser. + + Example:: + + # default literal class used is Literal + integer = Word(nums) + date_str = integer("year") + '/' + integer("month") + '/' + integer("day") + + date_str.parse_string("1999/12/31") # -> ['1999', '/', '12', '/', '31'] + + + # change to Suppress + ParserElement.inline_literals_using(Suppress) + date_str = integer("year") + '/' + integer("month") + '/' + integer("day") + + date_str.parse_string("1999/12/31") # -> ['1999', '12', '31'] + """ + ParserElement._literalStringClass = cls + + class DebugActions(NamedTuple): + debug_try: OptionalType[DebugStartAction] + debug_match: OptionalType[DebugSuccessAction] + debug_fail: OptionalType[DebugExceptionAction] + + def __init__(self, savelist: bool = False): + self.parseAction: List[ParseAction] = list() + self.failAction: OptionalType[ParseFailAction] = None + self.customName = None + self._defaultName = None + self.resultsName = None + self.saveAsList = savelist + self.skipWhitespace = True + self.whiteChars = set(ParserElement.DEFAULT_WHITE_CHARS) + self.copyDefaultWhiteChars = True + # used when checking for left-recursion + self.mayReturnEmpty = False + self.keepTabs = False + self.ignoreExprs: List["ParserElement"] = list() + self.debug = False + self.streamlined = False + # optimize exception handling for subclasses that don't advance parse index + self.mayIndexError = True + self.errmsg = "" + # mark results names as modal (report only last) or cumulative (list all) + self.modalResults = True + # custom debug actions + self.debugActions = self.DebugActions(None, None, None) + # avoid redundant calls to preParse + self.callPreparse = True + self.callDuringTry = False + self.suppress_warnings_: List[Diagnostics] = [] + + def suppress_warning(self, warning_type: Diagnostics) -> "ParserElement": + """ + Suppress warnings emitted for a particular diagnostic on this expression. + + Example:: + + base = pp.Forward() + base.suppress_warning(Diagnostics.warn_on_parse_using_empty_Forward) + + # statement would normally raise a warning, but is now suppressed + print(base.parseString("x")) + + """ + self.suppress_warnings_.append(warning_type) + return self + + def copy(self) -> "ParserElement": + """ + Make a copy of this :class:`ParserElement`. Useful for defining + different parse actions for the same parsing pattern, using copies of + the original parse element. + + Example:: + + integer = Word(nums).set_parse_action(lambda toks: int(toks[0])) + integerK = integer.copy().add_parse_action(lambda toks: toks[0] * 1024) + Suppress("K") + integerM = integer.copy().add_parse_action(lambda toks: toks[0] * 1024 * 1024) + Suppress("M") + + print(OneOrMore(integerK | integerM | integer).parse_string("5K 100 640K 256M")) + + prints:: + + [5120, 100, 655360, 268435456] + + Equivalent form of ``expr.copy()`` is just ``expr()``:: + + integerM = integer().add_parse_action(lambda toks: toks[0] * 1024 * 1024) + Suppress("M") + """ + cpy = copy.copy(self) + cpy.parseAction = self.parseAction[:] + cpy.ignoreExprs = self.ignoreExprs[:] + if self.copyDefaultWhiteChars: + cpy.whiteChars = set(ParserElement.DEFAULT_WHITE_CHARS) + return cpy + + def set_results_name( + self, name: str, list_all_matches: bool = False, *, listAllMatches: bool = False + ) -> "ParserElement": + """ + Define name for referencing matching tokens as a nested attribute + of the returned parse results. + + Normally, results names are assigned as you would assign keys in a dict: + any existing value is overwritten by later values. If it is necessary to + keep all values captured for a particular results name, call ``set_results_name`` + with ``list_all_matches`` = True. + + NOTE: ``set_results_name`` returns a *copy* of the original :class:`ParserElement` object; + this is so that the client can define a basic element, such as an + integer, and reference it in multiple places with different names. + + You can also set results names using the abbreviated syntax, + ``expr("name")`` in place of ``expr.set_results_name("name")`` + - see :class:`__call__`. If ``list_all_matches`` is required, use + ``expr("name*")``. + + Example:: + + date_str = (integer.set_results_name("year") + '/' + + integer.set_results_name("month") + '/' + + integer.set_results_name("day")) + + # equivalent form: + date_str = integer("year") + '/' + integer("month") + '/' + integer("day") + """ + listAllMatches = listAllMatches or list_all_matches + return self._setResultsName(name, listAllMatches) + + def _setResultsName(self, name, listAllMatches=False): + if name is None: + return self + newself = self.copy() + if name.endswith("*"): + name = name[:-1] + listAllMatches = True + newself.resultsName = name + newself.modalResults = not listAllMatches + return newself + + def set_break(self, break_flag: bool = True) -> "ParserElement": + """ + Method to invoke the Python pdb debugger when this element is + about to be parsed. Set ``break_flag`` to ``True`` to enable, ``False`` to + disable. + """ + if break_flag: + _parseMethod = self._parse + + def breaker(instring, loc, doActions=True, callPreParse=True): + import pdb + + # this call to pdb.set_trace() is intentional, not a checkin error + pdb.set_trace() + return _parseMethod(instring, loc, doActions, callPreParse) + + breaker._originalParseMethod = _parseMethod + self._parse = breaker + else: + if hasattr(self._parse, "_originalParseMethod"): + self._parse = self._parse._originalParseMethod + return self + + def set_parse_action(self, *fns: ParseAction, **kwargs) -> "ParserElement": + """ + Define one or more actions to perform when successfully matching parse element definition. + + Parse actions can be called to perform data conversions, do extra validation, + update external data structures, or enhance or replace the parsed tokens. + Each parse action ``fn`` is a callable method with 0-3 arguments, called as + ``fn(s, loc, toks)`` , ``fn(loc, toks)`` , ``fn(toks)`` , or just ``fn()`` , where: + + - s = the original string being parsed (see note below) + - loc = the location of the matching substring + - toks = a list of the matched tokens, packaged as a :class:`ParseResults` object + + The parsed tokens are passed to the parse action as ParseResults. They can be + modified in place using list-style append, extend, and pop operations to update + the parsed list elements; and with dictionary-style item set and del operations + to add, update, or remove any named results. If the tokens are modified in place, + it is not necessary to return them with a return statement. + + Parse actions can also completely replace the given tokens, with another ``ParseResults`` + object, or with some entirely different object (common for parse actions that perform data + conversions). A convenient way to build a new parse result is to define the values + using a dict, and then create the return value using :class:`ParseResults.from_dict`. + + If None is passed as the ``fn`` parse action, all previously added parse actions for this + expression are cleared. + + Optional keyword arguments: + + - call_during_try = (default= ``False``) indicate if parse action should be run during + lookaheads and alternate testing. For parse actions that have side effects, it is + important to only call the parse action once it is determined that it is being + called as part of a successful parse. For parse actions that perform additional + validation, then call_during_try should be passed as True, so that the validation + code is included in the preliminary "try" parses. + + Note: the default parsing behavior is to expand tabs in the input string + before starting the parsing process. See :class:`parse_string` for more + information on parsing strings containing ```` s, and suggested + methods to maintain a consistent view of the parsed string, the parse + location, and line and column positions within the parsed string. + + Example:: + + # parse dates in the form YYYY/MM/DD + + # use parse action to convert toks from str to int at parse time + def convert_to_int(toks): + return int(toks[0]) + + # use a parse action to verify that the date is a valid date + def is_valid_date(instring, loc, toks): + from datetime import date + year, month, day = toks[::2] + try: + date(year, month, day) + except ValueError: + raise ParseException(instring, loc, "invalid date given") + + integer = Word(nums) + date_str = integer + '/' + integer + '/' + integer + + # add parse actions + integer.set_parse_action(convert_to_int) + date_str.set_parse_action(is_valid_date) + + # note that integer fields are now ints, not strings + date_str.run_tests(''' + # successful parse - note that integer fields were converted to ints + 1999/12/31 + + # fail - invalid date + 1999/13/31 + ''') + """ + if list(fns) == [None]: + self.parseAction = [] + else: + if not all(callable(fn) for fn in fns): + raise TypeError("parse actions must be callable") + self.parseAction = [_trim_arity(fn) for fn in fns] + self.callDuringTry = kwargs.get( + "call_during_try", kwargs.get("callDuringTry", False) + ) + return self + + def add_parse_action(self, *fns: ParseAction, **kwargs) -> "ParserElement": + """ + Add one or more parse actions to expression's list of parse actions. See :class:`set_parse_action`. + + See examples in :class:`copy`. + """ + self.parseAction += [_trim_arity(fn) for fn in fns] + self.callDuringTry = self.callDuringTry or kwargs.get( + "call_during_try", kwargs.get("callDuringTry", False) + ) + return self + + def add_condition(self, *fns: ParseCondition, **kwargs) -> "ParserElement": + """Add a boolean predicate function to expression's list of parse actions. See + :class:`set_parse_action` for function call signatures. Unlike ``set_parse_action``, + functions passed to ``add_condition`` need to return boolean success/fail of the condition. + + Optional keyword arguments: + + - message = define a custom message to be used in the raised exception + - fatal = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise + ParseException + - call_during_try = boolean to indicate if this method should be called during internal tryParse calls, + default=False + + Example:: + + integer = Word(nums).set_parse_action(lambda toks: int(toks[0])) + year_int = integer.copy() + year_int.add_condition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later") + date_str = year_int + '/' + integer + '/' + integer + + result = date_str.parse_string("1999/12/31") # -> Exception: Only support years 2000 and later (at char 0), + (line:1, col:1) + """ + for fn in fns: + self.parseAction.append( + condition_as_parse_action( + fn, message=kwargs.get("message"), fatal=kwargs.get("fatal", False) + ) + ) + + self.callDuringTry = self.callDuringTry or kwargs.get( + "call_during_try", kwargs.get("callDuringTry", False) + ) + return self + + def set_fail_action(self, fn: ParseFailAction) -> "ParserElement": + """ + Define action to perform if parsing fails at this expression. + Fail acton fn is a callable function that takes the arguments + ``fn(s, loc, expr, err)`` where: + + - s = string being parsed + - loc = location where expression match was attempted and failed + - expr = the parse expression that failed + - err = the exception thrown + + The function returns no value. It may throw :class:`ParseFatalException` + if it is desired to stop parsing immediately.""" + self.failAction = fn + return self + + def _skipIgnorables(self, instring, loc): + exprsFound = True + while exprsFound: + exprsFound = False + for e in self.ignoreExprs: + try: + while 1: + loc, dummy = e._parse(instring, loc) + exprsFound = True + except ParseException: + pass + return loc + + def preParse(self, instring, loc): + if self.ignoreExprs: + loc = self._skipIgnorables(instring, loc) + + if self.skipWhitespace: + instrlen = len(instring) + white_chars = self.whiteChars + while loc < instrlen and instring[loc] in white_chars: + loc += 1 + + return loc + + def parseImpl(self, instring, loc, doActions=True): + return loc, [] + + def postParse(self, instring, loc, tokenlist): + return tokenlist + + # @profile + def _parseNoCache( + self, instring, loc, doActions=True, callPreParse=True + ) -> Tuple[int, ParseResults]: + TRY, MATCH, FAIL = 0, 1, 2 + debugging = self.debug # and doActions) + len_instring = len(instring) + + if debugging or self.failAction: + # print("Match {} at loc {}({}, {})".format(self, loc, lineno(loc, instring), col(loc, instring))) + try: + if callPreParse and self.callPreparse: + pre_loc = self.preParse(instring, loc) + else: + pre_loc = loc + tokens_start = pre_loc + if self.debugActions.debug_try: + self.debugActions.debug_try(instring, tokens_start, self, False) + if self.mayIndexError or pre_loc >= len_instring: + try: + loc, tokens = self.parseImpl(instring, pre_loc, doActions) + except IndexError: + raise ParseException(instring, len_instring, self.errmsg, self) + else: + loc, tokens = self.parseImpl(instring, pre_loc, doActions) + except Exception as err: + # print("Exception raised:", err) + if self.debugActions.debug_fail: + self.debugActions.debug_fail( + instring, tokens_start, self, err, False + ) + if self.failAction: + self.failAction(instring, tokens_start, self, err) + raise + else: + if callPreParse and self.callPreparse: + pre_loc = self.preParse(instring, loc) + else: + pre_loc = loc + tokens_start = pre_loc + if self.mayIndexError or pre_loc >= len_instring: + try: + loc, tokens = self.parseImpl(instring, pre_loc, doActions) + except IndexError: + raise ParseException(instring, len_instring, self.errmsg, self) + else: + loc, tokens = self.parseImpl(instring, pre_loc, doActions) + + tokens = self.postParse(instring, loc, tokens) + + ret_tokens = ParseResults( + tokens, self.resultsName, asList=self.saveAsList, modal=self.modalResults + ) + if self.parseAction and (doActions or self.callDuringTry): + if debugging: + try: + for fn in self.parseAction: + try: + tokens = fn(instring, tokens_start, ret_tokens) + except IndexError as parse_action_exc: + exc = ParseException("exception raised in parse action") + raise exc from parse_action_exc + + if tokens is not None and tokens is not ret_tokens: + ret_tokens = ParseResults( + tokens, + self.resultsName, + asList=self.saveAsList + and isinstance(tokens, (ParseResults, list)), + modal=self.modalResults, + ) + except Exception as err: + # print "Exception raised in user parse action:", err + if self.debugActions.debug_fail: + self.debugActions.debug_fail( + instring, tokens_start, self, err, False + ) + raise + else: + for fn in self.parseAction: + try: + tokens = fn(instring, tokens_start, ret_tokens) + except IndexError as parse_action_exc: + exc = ParseException("exception raised in parse action") + raise exc from parse_action_exc + + if tokens is not None and tokens is not ret_tokens: + ret_tokens = ParseResults( + tokens, + self.resultsName, + asList=self.saveAsList + and isinstance(tokens, (ParseResults, list)), + modal=self.modalResults, + ) + if debugging: + # print("Matched", self, "->", ret_tokens.as_list()) + if self.debugActions.debug_match: + self.debugActions.debug_match( + instring, tokens_start, loc, self, ret_tokens, False + ) + + return loc, ret_tokens + + def try_parse(self, instring: str, loc: int, raise_fatal: bool = False) -> int: + try: + return self._parse(instring, loc, doActions=False)[0] + except ParseFatalException: + if raise_fatal: + raise + raise ParseException(instring, loc, self.errmsg, self) + + def can_parse_next(self, instring: str, loc: int) -> bool: + try: + self.try_parse(instring, loc) + except (ParseException, IndexError): + return False + else: + return True + + # cache for left-recursion in Forward references + recursion_lock = RLock() + recursion_memos: DictType[ + Tuple[int, "Forward", bool], Tuple[int, Union[ParseResults, Exception]] + ] = {} + + # argument cache for optimizing repeated calls when backtracking through recursive expressions + packrat_cache = ( + {} + ) # this is set later by enabled_packrat(); this is here so that reset_cache() doesn't fail + packrat_cache_lock = RLock() + packrat_cache_stats = [0, 0] + + # this method gets repeatedly called during backtracking with the same arguments - + # we can cache these arguments and save ourselves the trouble of re-parsing the contained expression + def _parseCache( + self, instring, loc, doActions=True, callPreParse=True + ) -> Tuple[int, ParseResults]: + HIT, MISS = 0, 1 + TRY, MATCH, FAIL = 0, 1, 2 + lookup = (self, instring, loc, callPreParse, doActions) + with ParserElement.packrat_cache_lock: + cache = ParserElement.packrat_cache + value = cache.get(lookup) + if value is cache.not_in_cache: + ParserElement.packrat_cache_stats[MISS] += 1 + try: + value = self._parseNoCache(instring, loc, doActions, callPreParse) + except ParseBaseException as pe: + # cache a copy of the exception, without the traceback + cache.set(lookup, pe.__class__(*pe.args)) + raise + else: + cache.set(lookup, (value[0], value[1].copy(), loc)) + return value + else: + ParserElement.packrat_cache_stats[HIT] += 1 + if self.debug and self.debugActions.debug_try: + try: + self.debugActions.debug_try(instring, loc, self, cache_hit=True) + except TypeError: + pass + if isinstance(value, Exception): + if self.debug and self.debugActions.debug_fail: + try: + self.debugActions.debug_fail( + instring, loc, self, value, cache_hit=True + ) + except TypeError: + pass + raise value + + loc_, result, endloc = value[0], value[1].copy(), value[2] + if self.debug and self.debugActions.debug_match: + try: + self.debugActions.debug_match( + instring, loc_, endloc, self, result, cache_hit=True + ) + except TypeError: + pass + + return loc_, result + + _parse = _parseNoCache + + @staticmethod + def reset_cache() -> None: + ParserElement.packrat_cache.clear() + ParserElement.packrat_cache_stats[:] = [0] * len( + ParserElement.packrat_cache_stats + ) + ParserElement.recursion_memos.clear() + + _packratEnabled = False + _left_recursion_enabled = False + + @staticmethod + def disable_memoization() -> None: + """ + Disables active Packrat or Left Recursion parsing and their memoization + + This method also works if neither Packrat nor Left Recursion are enabled. + This makes it safe to call before activating Packrat nor Left Recursion + to clear any previous settings. + """ + ParserElement.reset_cache() + ParserElement._left_recursion_enabled = False + ParserElement._packratEnabled = False + ParserElement._parse = ParserElement._parseNoCache + + @staticmethod + def enable_left_recursion( + cache_size_limit: OptionalType[int] = None, *, force=False + ) -> None: + """ + Enables "bounded recursion" parsing, which allows for both direct and indirect + left-recursion. During parsing, left-recursive :class:`Forward` elements are + repeatedly matched with a fixed recursion depth that is gradually increased + until finding the longest match. + + Example:: + + import pyparsing as pp + pp.ParserElement.enable_left_recursion() + + E = pp.Forward("E") + num = pp.Word(pp.nums) + # match `num`, or `num '+' num`, or `num '+' num '+' num`, ... + E <<= E + '+' - num | num + + print(E.parse_string("1+2+3")) + + Recursion search naturally memoizes matches of ``Forward`` elements and may + thus skip reevaluation of parse actions during backtracking. This may break + programs with parse actions which rely on strict ordering of side-effects. + + Parameters: + + - cache_size_limit - (default=``None``) - memoize at most this many + ``Forward`` elements during matching; if ``None`` (the default), + memoize all ``Forward`` elements. + + Bounded Recursion parsing works similar but not identical to Packrat parsing, + thus the two cannot be used together. Use ``force=True`` to disable any + previous, conflicting settings. + """ + if force: + ParserElement.disable_memoization() + elif ParserElement._packratEnabled: + raise RuntimeError("Packrat and Bounded Recursion are not compatible") + if cache_size_limit is None: + ParserElement.recursion_memos = _UnboundedMemo() + elif cache_size_limit > 0: + ParserElement.recursion_memos = _LRUMemo(capacity=cache_size_limit) + else: + raise NotImplementedError("Memo size of %s" % cache_size_limit) + ParserElement._left_recursion_enabled = True + + @staticmethod + def enable_packrat(cache_size_limit: int = 128, *, force: bool = False) -> None: + """ + Enables "packrat" parsing, which adds memoizing to the parsing logic. + Repeated parse attempts at the same string location (which happens + often in many complex grammars) can immediately return a cached value, + instead of re-executing parsing/validating code. Memoizing is done of + both valid results and parsing exceptions. + + Parameters: + + - cache_size_limit - (default= ``128``) - if an integer value is provided + will limit the size of the packrat cache; if None is passed, then + the cache size will be unbounded; if 0 is passed, the cache will + be effectively disabled. + + This speedup may break existing programs that use parse actions that + have side-effects. For this reason, packrat parsing is disabled when + you first import pyparsing. To activate the packrat feature, your + program must call the class method :class:`ParserElement.enable_packrat`. + For best results, call ``enable_packrat()`` immediately after + importing pyparsing. + + Example:: + + import pyparsing + pyparsing.ParserElement.enable_packrat() + + Packrat parsing works similar but not identical to Bounded Recursion parsing, + thus the two cannot be used together. Use ``force=True`` to disable any + previous, conflicting settings. + """ + if force: + ParserElement.disable_memoization() + elif ParserElement._left_recursion_enabled: + raise RuntimeError("Packrat and Bounded Recursion are not compatible") + if not ParserElement._packratEnabled: + ParserElement._packratEnabled = True + if cache_size_limit is None: + ParserElement.packrat_cache = _UnboundedCache() + else: + ParserElement.packrat_cache = _FifoCache(cache_size_limit) + ParserElement._parse = ParserElement._parseCache + + def parse_string( + self, instring: str, parse_all: bool = False, *, parseAll: bool = False + ) -> ParseResults: + """ + Parse a string with respect to the parser definition. This function is intended as the primary interface to the + client code. + + :param instring: The input string to be parsed. + :param parse_all: If set, the entire input string must match the grammar. + :param parseAll: retained for pre-PEP8 compatibility, will be removed in a future release. + :raises ParseException: Raised if ``parse_all`` is set and the input string does not match the whole grammar. + :returns: the parsed data as a :class:`ParseResults` object, which may be accessed as a `list`, a `dict`, or + an object with attributes if the given parser includes results names. + + If the input string is required to match the entire grammar, ``parse_all`` flag must be set to ``True``. This + is also equivalent to ending the grammar with :class:`StringEnd`(). + + To report proper column numbers, ``parse_string`` operates on a copy of the input string where all tabs are + converted to spaces (8 spaces per tab, as per the default in ``string.expandtabs``). If the input string + contains tabs and the grammar uses parse actions that use the ``loc`` argument to index into the string + being parsed, one can ensure a consistent view of the input string by doing one of the following: + + - calling ``parse_with_tabs`` on your grammar before calling ``parse_string`` (see :class:`parse_with_tabs`), + - define your parse action using the full ``(s,loc,toks)`` signature, and reference the input string using the + parse action's ``s`` argument, or + - explicitly expand the tabs in your input string before calling ``parse_string``. + + Examples: + + By default, partial matches are OK. + + >>> res = Word('a').parse_string('aaaaabaaa') + >>> print(res) + ['aaaaa'] + + The parsing behavior varies by the inheriting class of this abstract class. Please refer to the children + directly to see more examples. + + It raises an exception if parse_all flag is set and instring does not match the whole grammar. + + >>> res = Word('a').parse_string('aaaaabaaa', parse_all=True) + Traceback (most recent call last): + ... + pyparsing.ParseException: Expected end of text, found 'b' (at char 5), (line:1, col:6) + """ + parseAll = parse_all or parseAll + + ParserElement.reset_cache() + if not self.streamlined: + self.streamline() + for e in self.ignoreExprs: + e.streamline() + if not self.keepTabs: + instring = instring.expandtabs() + try: + loc, tokens = self._parse(instring, 0) + if parseAll: + loc = self.preParse(instring, loc) + se = Empty() + StringEnd() + se._parse(instring, loc) + except ParseBaseException as exc: + if ParserElement.verbose_stacktrace: + raise + else: + # catch and re-raise exception from here, clearing out pyparsing internal stack trace + raise exc.with_traceback(None) + else: + return tokens + + def scan_string( + self, + instring: str, + max_matches: int = _MAX_INT, + overlap: bool = False, + *, + debug: bool = False, + maxMatches: int = _MAX_INT, + ) -> Generator[Tuple[ParseResults, int, int], None, None]: + """ + Scan the input string for expression matches. Each match will return the + matching tokens, start location, and end location. May be called with optional + ``max_matches`` argument, to clip scanning after 'n' matches are found. If + ``overlap`` is specified, then overlapping matches will be reported. + + Note that the start and end locations are reported relative to the string + being parsed. See :class:`parse_string` for more information on parsing + strings with embedded tabs. + + Example:: + + source = "sldjf123lsdjjkf345sldkjf879lkjsfd987" + print(source) + for tokens, start, end in Word(alphas).scan_string(source): + print(' '*start + '^'*(end-start)) + print(' '*start + tokens[0]) + + prints:: + + sldjf123lsdjjkf345sldkjf879lkjsfd987 + ^^^^^ + sldjf + ^^^^^^^ + lsdjjkf + ^^^^^^ + sldkjf + ^^^^^^ + lkjsfd + """ + maxMatches = min(maxMatches, max_matches) + if not self.streamlined: + self.streamline() + for e in self.ignoreExprs: + e.streamline() + + if not self.keepTabs: + instring = str(instring).expandtabs() + instrlen = len(instring) + loc = 0 + preparseFn = self.preParse + parseFn = self._parse + ParserElement.resetCache() + matches = 0 + try: + while loc <= instrlen and matches < maxMatches: + try: + preloc = preparseFn(instring, loc) + nextLoc, tokens = parseFn(instring, preloc, callPreParse=False) + except ParseException: + loc = preloc + 1 + else: + if nextLoc > loc: + matches += 1 + if debug: + print( + { + "tokens": tokens.asList(), + "start": preloc, + "end": nextLoc, + } + ) + yield tokens, preloc, nextLoc + if overlap: + nextloc = preparseFn(instring, loc) + if nextloc > loc: + loc = nextLoc + else: + loc += 1 + else: + loc = nextLoc + else: + loc = preloc + 1 + except ParseBaseException as exc: + if ParserElement.verbose_stacktrace: + raise + else: + # catch and re-raise exception from here, clears out pyparsing internal stack trace + raise exc.with_traceback(None) + + def transform_string(self, instring: str, *, debug: bool = False) -> str: + """ + Extension to :class:`scan_string`, to modify matching text with modified tokens that may + be returned from a parse action. To use ``transform_string``, define a grammar and + attach a parse action to it that modifies the returned token list. + Invoking ``transform_string()`` on a target string will then scan for matches, + and replace the matched text patterns according to the logic in the parse + action. ``transform_string()`` returns the resulting transformed string. + + Example:: + + wd = Word(alphas) + wd.set_parse_action(lambda toks: toks[0].title()) + + print(wd.transform_string("now is the winter of our discontent made glorious summer by this sun of york.")) + + prints:: + + Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York. + """ + out: List[str] = [] + lastE = 0 + # force preservation of s, to minimize unwanted transformation of string, and to + # keep string locs straight between transform_string and scan_string + self.keepTabs = True + try: + for t, s, e in self.scan_string(instring, debug=debug): + out.append(instring[lastE:s]) + if t: + if isinstance(t, ParseResults): + out += t.as_list() + elif isinstance(t, Iterable) and not isinstance(t, str_type): + out.extend(t) + else: + out.append(t) + lastE = e + out.append(instring[lastE:]) + out = [o for o in out if o] + return "".join([str(s) for s in _flatten(out)]) + except ParseBaseException as exc: + if ParserElement.verbose_stacktrace: + raise + else: + # catch and re-raise exception from here, clears out pyparsing internal stack trace + raise exc.with_traceback(None) + + def search_string( + self, + instring: str, + max_matches: int = _MAX_INT, + *, + debug: bool = False, + maxMatches: int = _MAX_INT, + ) -> ParseResults: + """ + Another extension to :class:`scan_string`, simplifying the access to the tokens found + to match the given parse expression. May be called with optional + ``max_matches`` argument, to clip searching after 'n' matches are found. + + Example:: + + # a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters + cap_word = Word(alphas.upper(), alphas.lower()) + + print(cap_word.search_string("More than Iron, more than Lead, more than Gold I need Electricity")) + + # the sum() builtin can be used to merge results into a single ParseResults object + print(sum(cap_word.search_string("More than Iron, more than Lead, more than Gold I need Electricity"))) + + prints:: + + [['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']] + ['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity'] + """ + maxMatches = min(maxMatches, max_matches) + try: + return ParseResults( + [t for t, s, e in self.scan_string(instring, maxMatches, debug=debug)] + ) + except ParseBaseException as exc: + if ParserElement.verbose_stacktrace: + raise + else: + # catch and re-raise exception from here, clears out pyparsing internal stack trace + raise exc.with_traceback(None) + + def split( + self, + instring: str, + maxsplit: int = _MAX_INT, + include_separators: bool = False, + *, + includeSeparators=False, + ) -> Generator[str, None, None]: + """ + Generator method to split a string using the given expression as a separator. + May be called with optional ``maxsplit`` argument, to limit the number of splits; + and the optional ``include_separators`` argument (default= ``False``), if the separating + matching text should be included in the split results. + + Example:: + + punc = one_of(list(".,;:/-!?")) + print(list(punc.split("This, this?, this sentence, is badly punctuated!"))) + + prints:: + + ['This', ' this', '', ' this sentence', ' is badly punctuated', ''] + """ + includeSeparators = includeSeparators or include_separators + last = 0 + for t, s, e in self.scan_string(instring, max_matches=maxsplit): + yield instring[last:s] + if includeSeparators: + yield t[0] + last = e + yield instring[last:] + + def __add__(self, other) -> "ParserElement": + """ + Implementation of ``+`` operator - returns :class:`And`. Adding strings to a :class:`ParserElement` + converts them to :class:`Literal`s by default. + + Example:: + + greet = Word(alphas) + "," + Word(alphas) + "!" + hello = "Hello, World!" + print(hello, "->", greet.parse_string(hello)) + + prints:: + + Hello, World! -> ['Hello', ',', 'World', '!'] + + ``...`` may be used as a parse expression as a short form of :class:`SkipTo`. + + Literal('start') + ... + Literal('end') + + is equivalent to: + + Literal('start') + SkipTo('end')("_skipped*") + Literal('end') + + Note that the skipped text is returned with '_skipped' as a results name, + and to support having multiple skips in the same parser, the value returned is + a list of all skipped text. + """ + if other is Ellipsis: + return _PendingSkip(self) + + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return And([self, other]) + + def __radd__(self, other) -> "ParserElement": + """ + Implementation of ``+`` operator when left operand is not a :class:`ParserElement` + """ + if other is Ellipsis: + return SkipTo(self)("_skipped*") + self + + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return other + self + + def __sub__(self, other) -> "ParserElement": + """ + Implementation of ``-`` operator, returns :class:`And` with error stop + """ + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return self + And._ErrorStop() + other + + def __rsub__(self, other) -> "ParserElement": + """ + Implementation of ``-`` operator when left operand is not a :class:`ParserElement` + """ + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return other - self + + def __mul__(self, other) -> "ParserElement": + """ + Implementation of ``*`` operator, allows use of ``expr * 3`` in place of + ``expr + expr + expr``. Expressions may also be multiplied by a 2-integer + tuple, similar to ``{min, max}`` multipliers in regular expressions. Tuples + may also include ``None`` as in: + - ``expr*(n, None)`` or ``expr*(n, )`` is equivalent + to ``expr*n + ZeroOrMore(expr)`` + (read as "at least n instances of ``expr``") + - ``expr*(None, n)`` is equivalent to ``expr*(0, n)`` + (read as "0 to n instances of ``expr``") + - ``expr*(None, None)`` is equivalent to ``ZeroOrMore(expr)`` + - ``expr*(1, None)`` is equivalent to ``OneOrMore(expr)`` + + Note that ``expr*(None, n)`` does not raise an exception if + more than n exprs exist in the input stream; that is, + ``expr*(None, n)`` does not enforce a maximum number of expr + occurrences. If this behavior is desired, then write + ``expr*(None, n) + ~expr`` + """ + if other is Ellipsis: + other = (0, None) + elif isinstance(other, tuple) and other[:1] == (Ellipsis,): + other = ((0,) + other[1:] + (None,))[:2] + + if isinstance(other, int): + minElements, optElements = other, 0 + elif isinstance(other, tuple): + other = tuple(o if o is not Ellipsis else None for o in other) + other = (other + (None, None))[:2] + if other[0] is None: + other = (0, other[1]) + if isinstance(other[0], int) and other[1] is None: + if other[0] == 0: + return ZeroOrMore(self) + if other[0] == 1: + return OneOrMore(self) + else: + return self * other[0] + ZeroOrMore(self) + elif isinstance(other[0], int) and isinstance(other[1], int): + minElements, optElements = other + optElements -= minElements + else: + raise TypeError( + "cannot multiply ParserElement and ({}) objects".format( + ",".join(type(item).__name__ for item in other) + ) + ) + else: + raise TypeError( + "cannot multiply ParserElement and {} objects".format( + type(other).__name__ + ) + ) + + if minElements < 0: + raise ValueError("cannot multiply ParserElement by negative value") + if optElements < 0: + raise ValueError( + "second tuple value must be greater or equal to first tuple value" + ) + if minElements == optElements == 0: + return And([]) + + if optElements: + + def makeOptionalList(n): + if n > 1: + return Opt(self + makeOptionalList(n - 1)) + else: + return Opt(self) + + if minElements: + if minElements == 1: + ret = self + makeOptionalList(optElements) + else: + ret = And([self] * minElements) + makeOptionalList(optElements) + else: + ret = makeOptionalList(optElements) + else: + if minElements == 1: + ret = self + else: + ret = And([self] * minElements) + return ret + + def __rmul__(self, other) -> "ParserElement": + return self.__mul__(other) + + def __or__(self, other) -> "ParserElement": + """ + Implementation of ``|`` operator - returns :class:`MatchFirst` + """ + if other is Ellipsis: + return _PendingSkip(self, must_skip=True) + + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return MatchFirst([self, other]) + + def __ror__(self, other) -> "ParserElement": + """ + Implementation of ``|`` operator when left operand is not a :class:`ParserElement` + """ + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return other | self + + def __xor__(self, other) -> "ParserElement": + """ + Implementation of ``^`` operator - returns :class:`Or` + """ + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return Or([self, other]) + + def __rxor__(self, other) -> "ParserElement": + """ + Implementation of ``^`` operator when left operand is not a :class:`ParserElement` + """ + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return other ^ self + + def __and__(self, other) -> "ParserElement": + """ + Implementation of ``&`` operator - returns :class:`Each` + """ + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return Each([self, other]) + + def __rand__(self, other) -> "ParserElement": + """ + Implementation of ``&`` operator when left operand is not a :class:`ParserElement` + """ + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return other & self + + def __invert__(self) -> "ParserElement": + """ + Implementation of ``~`` operator - returns :class:`NotAny` + """ + return NotAny(self) + + # disable __iter__ to override legacy use of sequential access to __getitem__ to + # iterate over a sequence + __iter__ = None + + def __getitem__(self, key): + """ + use ``[]`` indexing notation as a short form for expression repetition: + + - ``expr[n]`` is equivalent to ``expr*n`` + - ``expr[m, n]`` is equivalent to ``expr*(m, n)`` + - ``expr[n, ...]`` or ``expr[n,]`` is equivalent + to ``expr*n + ZeroOrMore(expr)`` + (read as "at least n instances of ``expr``") + - ``expr[..., n]`` is equivalent to ``expr*(0, n)`` + (read as "0 to n instances of ``expr``") + - ``expr[...]`` and ``expr[0, ...]`` are equivalent to ``ZeroOrMore(expr)`` + - ``expr[1, ...]`` is equivalent to ``OneOrMore(expr)`` + + ``None`` may be used in place of ``...``. + + Note that ``expr[..., n]`` and ``expr[m, n]``do not raise an exception + if more than ``n`` ``expr``s exist in the input stream. If this behavior is + desired, then write ``expr[..., n] + ~expr``. + """ + + # convert single arg keys to tuples + try: + if isinstance(key, str_type): + key = (key,) + iter(key) + except TypeError: + key = (key, key) + + if len(key) > 2: + raise TypeError( + "only 1 or 2 index arguments supported ({}{})".format( + key[:5], "... [{}]".format(len(key)) if len(key) > 5 else "" + ) + ) + + # clip to 2 elements + ret = self * tuple(key[:2]) + return ret + + def __call__(self, name: str = None) -> "ParserElement": + """ + Shortcut for :class:`set_results_name`, with ``list_all_matches=False``. + + If ``name`` is given with a trailing ``'*'`` character, then ``list_all_matches`` will be + passed as ``True``. + + If ``name` is omitted, same as calling :class:`copy`. + + Example:: + + # these are equivalent + userdata = Word(alphas).set_results_name("name") + Word(nums + "-").set_results_name("socsecno") + userdata = Word(alphas)("name") + Word(nums + "-")("socsecno") + """ + if name is not None: + return self._setResultsName(name) + else: + return self.copy() + + def suppress(self) -> "ParserElement": + """ + Suppresses the output of this :class:`ParserElement`; useful to keep punctuation from + cluttering up returned output. + """ + return Suppress(self) + + def ignore_whitespace(self, recursive: bool = True) -> "ParserElement": + """ + Enables the skipping of whitespace before matching the characters in the + :class:`ParserElement`'s defined pattern. + + :param recursive: If ``True`` (the default), also enable whitespace skipping in child elements (if any) + """ + self.skipWhitespace = True + return self + + def leave_whitespace(self, recursive: bool = True) -> "ParserElement": + """ + Disables the skipping of whitespace before matching the characters in the + :class:`ParserElement`'s defined pattern. This is normally only used internally by + the pyparsing module, but may be needed in some whitespace-sensitive grammars. + + :param recursive: If true (the default), also disable whitespace skipping in child elements (if any) + """ + self.skipWhitespace = False + return self + + def set_whitespace_chars( + self, chars: Union[Set[str], str], copy_defaults: bool = False + ) -> "ParserElement": + """ + Overrides the default whitespace chars + """ + self.skipWhitespace = True + self.whiteChars = set(chars) + self.copyDefaultWhiteChars = copy_defaults + return self + + def parse_with_tabs(self) -> "ParserElement": + """ + Overrides default behavior to expand ```` s to spaces before parsing the input string. + Must be called before ``parse_string`` when the input grammar contains elements that + match ```` characters. + """ + self.keepTabs = True + return self + + def ignore(self, other: "ParserElement") -> "ParserElement": + """ + Define expression to be ignored (e.g., comments) while doing pattern + matching; may be called repeatedly, to define multiple comment or other + ignorable patterns. + + Example:: + + patt = OneOrMore(Word(alphas)) + patt.parse_string('ablaj /* comment */ lskjd') + # -> ['ablaj'] + + patt.ignore(c_style_comment) + patt.parse_string('ablaj /* comment */ lskjd') + # -> ['ablaj', 'lskjd'] + """ + import typing + + if isinstance(other, str_type): + other = Suppress(other) + + if isinstance(other, Suppress): + if other not in self.ignoreExprs: + self.ignoreExprs.append(other) + else: + self.ignoreExprs.append(Suppress(other.copy())) + return self + + def set_debug_actions( + self, + start_action: DebugStartAction, + success_action: DebugSuccessAction, + exception_action: DebugExceptionAction, + ) -> "ParserElement": + """ + Customize display of debugging messages while doing pattern matching: + + - ``start_action`` - method to be called when an expression is about to be parsed; + should have the signature ``fn(input_string: str, location: int, expression: ParserElement, cache_hit: bool)`` + + - ``success_action`` - method to be called when an expression has successfully parsed; + should have the signature ``fn(input_string: str, start_location: int, end_location: int, expression: ParserELement, parsed_tokens: ParseResults, cache_hit: bool)`` + + - ``exception_action`` - method to be called when expression fails to parse; + should have the signature ``fn(input_string: str, location: int, expression: ParserElement, exception: Exception, cache_hit: bool)`` + """ + self.debugActions = self.DebugActions( + start_action or _default_start_debug_action, + success_action or _default_success_debug_action, + exception_action or _default_exception_debug_action, + ) + self.debug = True + return self + + def set_debug(self, flag: bool = True) -> "ParserElement": + """ + Enable display of debugging messages while doing pattern matching. + Set ``flag`` to ``True`` to enable, ``False`` to disable. + + Example:: + + wd = Word(alphas).set_name("alphaword") + integer = Word(nums).set_name("numword") + term = wd | integer + + # turn on debugging for wd + wd.set_debug() + + OneOrMore(term).parse_string("abc 123 xyz 890") + + prints:: + + Match alphaword at loc 0(1,1) + Matched alphaword -> ['abc'] + Match alphaword at loc 3(1,4) + Exception raised:Expected alphaword (at char 4), (line:1, col:5) + Match alphaword at loc 7(1,8) + Matched alphaword -> ['xyz'] + Match alphaword at loc 11(1,12) + Exception raised:Expected alphaword (at char 12), (line:1, col:13) + Match alphaword at loc 15(1,16) + Exception raised:Expected alphaword (at char 15), (line:1, col:16) + + The output shown is that produced by the default debug actions - custom debug actions can be + specified using :class:`set_debug_actions`. Prior to attempting + to match the ``wd`` expression, the debugging message ``"Match at loc (,)"`` + is shown. Then if the parse succeeds, a ``"Matched"`` message is shown, or an ``"Exception raised"`` + message is shown. Also note the use of :class:`set_name` to assign a human-readable name to the expression, + which makes debugging and exception messages easier to understand - for instance, the default + name created for the :class:`Word` expression without calling ``set_name`` is ``"W:(A-Za-z)"``. + """ + if flag: + self.set_debug_actions( + _default_start_debug_action, + _default_success_debug_action, + _default_exception_debug_action, + ) + else: + self.debug = False + return self + + @property + def default_name(self) -> str: + if self._defaultName is None: + self._defaultName = self._generateDefaultName() + return self._defaultName + + @abstractmethod + def _generateDefaultName(self): + """ + Child classes must define this method, which defines how the ``default_name`` is set. + """ + + def set_name(self, name: str) -> "ParserElement": + """ + Define name for this expression, makes debugging and exception messages clearer. + Example:: + Word(nums).parse_string("ABC") # -> Exception: Expected W:(0-9) (at char 0), (line:1, col:1) + Word(nums).set_name("integer").parse_string("ABC") # -> Exception: Expected integer (at char 0), (line:1, col:1) + """ + self.customName = name + self.errmsg = "Expected " + self.name + if __diag__.enable_debug_on_named_expressions: + self.set_debug() + return self + + @property + def name(self) -> str: + # This will use a user-defined name if available, but otherwise defaults back to the auto-generated name + return self.customName if self.customName is not None else self.default_name + + def __str__(self) -> str: + return self.name + + def __repr__(self) -> str: + return str(self) + + def streamline(self) -> "ParserElement": + self.streamlined = True + self._defaultName = None + return self + + def recurse(self) -> Sequence["ParserElement"]: + return [] + + def _checkRecursion(self, parseElementList): + subRecCheckList = parseElementList[:] + [self] + for e in self.recurse(): + e._checkRecursion(subRecCheckList) + + def validate(self, validateTrace=None) -> None: + """ + Check defined expressions for valid structure, check for infinite recursive definitions. + """ + self._checkRecursion([]) + + def parse_file( + self, + file_or_filename: Union[str, Path, TextIO], + encoding: str = "utf-8", + parse_all: bool = False, + *, + parseAll: bool = False, + ) -> ParseResults: + """ + Execute the parse expression on the given file or filename. + If a filename is specified (instead of a file object), + the entire file is opened, read, and closed before parsing. + """ + parseAll = parseAll or parse_all + try: + file_contents = file_or_filename.read() + except AttributeError: + with open(file_or_filename, "r", encoding=encoding) as f: + file_contents = f.read() + try: + return self.parse_string(file_contents, parseAll) + except ParseBaseException as exc: + if ParserElement.verbose_stacktrace: + raise + else: + # catch and re-raise exception from here, clears out pyparsing internal stack trace + raise exc.with_traceback(None) + + def __eq__(self, other): + if self is other: + return True + elif isinstance(other, str_type): + return self.matches(other, parse_all=True) + elif isinstance(other, ParserElement): + return vars(self) == vars(other) + return False + + def __hash__(self): + return id(self) + + def matches( + self, test_string: str, parse_all: bool = True, *, parseAll: bool = True + ) -> bool: + """ + Method for quick testing of a parser against a test string. Good for simple + inline microtests of sub expressions while building up larger parser. + + Parameters: + - ``test_string`` - to test against this expression for a match + - ``parse_all`` - (default= ``True``) - flag to pass to :class:`parse_string` when running tests + + Example:: + + expr = Word(nums) + assert expr.matches("100") + """ + parseAll = parseAll and parse_all + try: + self.parse_string(str(test_string), parse_all=parseAll) + return True + except ParseBaseException: + return False + + def run_tests( + self, + tests: Union[str, List[str]], + parse_all: bool = True, + comment: OptionalType[Union["ParserElement", str]] = "#", + full_dump: bool = True, + print_results: bool = True, + failure_tests: bool = False, + post_parse: Callable[[str, ParseResults], str] = None, + file: OptionalType[TextIO] = None, + with_line_numbers: bool = False, + *, + parseAll: bool = True, + fullDump: bool = True, + printResults: bool = True, + failureTests: bool = False, + postParse: Callable[[str, ParseResults], str] = None, + ) -> Tuple[bool, List[Tuple[str, Union[ParseResults, Exception]]]]: + """ + Execute the parse expression on a series of test strings, showing each + test, the parsed results or where the parse failed. Quick and easy way to + run a parse expression against a list of sample strings. + + Parameters: + - ``tests`` - a list of separate test strings, or a multiline string of test strings + - ``parse_all`` - (default= ``True``) - flag to pass to :class:`parse_string` when running tests + - ``comment`` - (default= ``'#'``) - expression for indicating embedded comments in the test + string; pass None to disable comment filtering + - ``full_dump`` - (default= ``True``) - dump results as list followed by results names in nested outline; + if False, only dump nested list + - ``print_results`` - (default= ``True``) prints test output to stdout + - ``failure_tests`` - (default= ``False``) indicates if these tests are expected to fail parsing + - ``post_parse`` - (default= ``None``) optional callback for successful parse results; called as + `fn(test_string, parse_results)` and returns a string to be added to the test output + - ``file`` - (default= ``None``) optional file-like object to which test output will be written; + if None, will default to ``sys.stdout`` + - ``with_line_numbers`` - default= ``False``) show test strings with line and column numbers + + Returns: a (success, results) tuple, where success indicates that all tests succeeded + (or failed if ``failure_tests`` is True), and the results contain a list of lines of each + test's output + + Example:: + + number_expr = pyparsing_common.number.copy() + + result = number_expr.run_tests(''' + # unsigned integer + 100 + # negative integer + -100 + # float with scientific notation + 6.02e23 + # integer with scientific notation + 1e-12 + ''') + print("Success" if result[0] else "Failed!") + + result = number_expr.run_tests(''' + # stray character + 100Z + # missing leading digit before '.' + -.100 + # too many '.' + 3.14.159 + ''', failure_tests=True) + print("Success" if result[0] else "Failed!") + + prints:: + + # unsigned integer + 100 + [100] + + # negative integer + -100 + [-100] + + # float with scientific notation + 6.02e23 + [6.02e+23] + + # integer with scientific notation + 1e-12 + [1e-12] + + Success + + # stray character + 100Z + ^ + FAIL: Expected end of text (at char 3), (line:1, col:4) + + # missing leading digit before '.' + -.100 + ^ + FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1) + + # too many '.' + 3.14.159 + ^ + FAIL: Expected end of text (at char 4), (line:1, col:5) + + Success + + Each test string must be on a single line. If you want to test a string that spans multiple + lines, create a test like this:: + + expr.run_tests(r"this is a test\\n of strings that spans \\n 3 lines") + + (Note that this is a raw string literal, you must include the leading ``'r'``.) + """ + from .testing import pyparsing_test + + parseAll = parseAll and parse_all + fullDump = fullDump and full_dump + printResults = printResults and print_results + failureTests = failureTests or failure_tests + postParse = postParse or post_parse + if isinstance(tests, str_type): + line_strip = type(tests).strip + tests = [line_strip(test_line) for test_line in tests.rstrip().splitlines()] + if isinstance(comment, str_type): + comment = Literal(comment) + if file is None: + file = sys.stdout + print_ = file.write + + result: Union[ParseResults, Exception] + allResults = [] + comments = [] + success = True + NL = Literal(r"\n").add_parse_action(replace_with("\n")).ignore(quoted_string) + BOM = "\ufeff" + for t in tests: + if comment is not None and comment.matches(t, False) or comments and not t: + comments.append( + pyparsing_test.with_line_numbers(t) if with_line_numbers else t + ) + continue + if not t: + continue + out = [ + "\n" + "\n".join(comments) if comments else "", + pyparsing_test.with_line_numbers(t) if with_line_numbers else t, + ] + comments = [] + try: + # convert newline marks to actual newlines, and strip leading BOM if present + t = NL.transform_string(t.lstrip(BOM)) + result = self.parse_string(t, parse_all=parseAll) + except ParseBaseException as pe: + fatal = "(FATAL)" if isinstance(pe, ParseFatalException) else "" + out.append(pe.explain()) + out.append("FAIL: " + str(pe)) + if ParserElement.verbose_stacktrace: + out.extend(traceback.format_tb(pe.__traceback__)) + success = success and failureTests + result = pe + except Exception as exc: + out.append("FAIL-EXCEPTION: {}: {}".format(type(exc).__name__, exc)) + if ParserElement.verbose_stacktrace: + out.extend(traceback.format_tb(exc.__traceback__)) + success = success and failureTests + result = exc + else: + success = success and not failureTests + if postParse is not None: + try: + pp_value = postParse(t, result) + if pp_value is not None: + if isinstance(pp_value, ParseResults): + out.append(pp_value.dump()) + else: + out.append(str(pp_value)) + else: + out.append(result.dump()) + except Exception as e: + out.append(result.dump(full=fullDump)) + out.append( + "{} failed: {}: {}".format( + postParse.__name__, type(e).__name__, e + ) + ) + else: + out.append(result.dump(full=fullDump)) + out.append("") + + if printResults: + print_("\n".join(out)) + + allResults.append((t, result)) + + return success, allResults + + def create_diagram( + self, + output_html: Union[TextIO, Path, str], + vertical: int = 3, + show_results_names: bool = False, + show_groups: bool = False, + **kwargs, + ) -> None: + """ + Create a railroad diagram for the parser. + + Parameters: + - output_html (str or file-like object) - output target for generated + diagram HTML + - vertical (int) - threshold for formatting multiple alternatives vertically + instead of horizontally (default=3) + - show_results_names - bool flag whether diagram should show annotations for + defined results names + - show_groups - bool flag whether groups should be highlighted with an unlabeled surrounding box + Additional diagram-formatting keyword arguments can also be included; + see railroad.Diagram class. + """ + + try: + from .diagram import to_railroad, railroad_to_html + except ImportError as ie: + raise Exception( + "must ``pip install pyparsing[diagrams]`` to generate parser railroad diagrams" + ) from ie + + self.streamline() + + railroad = to_railroad( + self, + vertical=vertical, + show_results_names=show_results_names, + show_groups=show_groups, + diagram_kwargs=kwargs, + ) + if isinstance(output_html, (str, Path)): + with open(output_html, "w", encoding="utf-8") as diag_file: + diag_file.write(railroad_to_html(railroad)) + else: + # we were passed a file-like object, just write to it + output_html.write(railroad_to_html(railroad)) + + setDefaultWhitespaceChars = set_default_whitespace_chars + inlineLiteralsUsing = inline_literals_using + setResultsName = set_results_name + setBreak = set_break + setParseAction = set_parse_action + addParseAction = add_parse_action + addCondition = add_condition + setFailAction = set_fail_action + tryParse = try_parse + canParseNext = can_parse_next + resetCache = reset_cache + enableLeftRecursion = enable_left_recursion + enablePackrat = enable_packrat + parseString = parse_string + scanString = scan_string + searchString = search_string + transformString = transform_string + setWhitespaceChars = set_whitespace_chars + parseWithTabs = parse_with_tabs + setDebugActions = set_debug_actions + setDebug = set_debug + defaultName = default_name + setName = set_name + parseFile = parse_file + runTests = run_tests + ignoreWhitespace = ignore_whitespace + leaveWhitespace = leave_whitespace + + +class _PendingSkip(ParserElement): + # internal placeholder class to hold a place were '...' is added to a parser element, + # once another ParserElement is added, this placeholder will be replaced with a SkipTo + def __init__(self, expr: ParserElement, must_skip: bool = False): + super().__init__() + self.anchor = expr + self.must_skip = must_skip + + def _generateDefaultName(self): + return str(self.anchor + Empty()).replace("Empty", "...") + + def __add__(self, other) -> "ParserElement": + skipper = SkipTo(other).set_name("...")("_skipped*") + if self.must_skip: + + def must_skip(t): + if not t._skipped or t._skipped.as_list() == [""]: + del t[0] + t.pop("_skipped", None) + + def show_skip(t): + if t._skipped.as_list()[-1:] == [""]: + t.pop("_skipped") + t["_skipped"] = "missing <" + repr(self.anchor) + ">" + + return ( + self.anchor + skipper().add_parse_action(must_skip) + | skipper().add_parse_action(show_skip) + ) + other + + return self.anchor + skipper + other + + def __repr__(self): + return self.defaultName + + def parseImpl(self, *args): + raise Exception( + "use of `...` expression without following SkipTo target expression" + ) + + +class Token(ParserElement): + """Abstract :class:`ParserElement` subclass, for defining atomic + matching patterns. + """ + + def __init__(self): + super().__init__(savelist=False) + + def _generateDefaultName(self): + return type(self).__name__ + + +class Empty(Token): + """ + An empty token, will always match. + """ + + def __init__(self): + super().__init__() + self.mayReturnEmpty = True + self.mayIndexError = False + + +class NoMatch(Token): + """ + A token that will never match. + """ + + def __init__(self): + super().__init__() + self.mayReturnEmpty = True + self.mayIndexError = False + self.errmsg = "Unmatchable token" + + def parseImpl(self, instring, loc, doActions=True): + raise ParseException(instring, loc, self.errmsg, self) + + +class Literal(Token): + """ + Token to exactly match a specified string. + + Example:: + + Literal('blah').parse_string('blah') # -> ['blah'] + Literal('blah').parse_string('blahfooblah') # -> ['blah'] + Literal('blah').parse_string('bla') # -> Exception: Expected "blah" + + For case-insensitive matching, use :class:`CaselessLiteral`. + + For keyword matching (force word break before and after the matched string), + use :class:`Keyword` or :class:`CaselessKeyword`. + """ + + def __init__(self, match_string: str = "", *, matchString: str = ""): + super().__init__() + match_string = matchString or match_string + self.match = match_string + self.matchLen = len(match_string) + try: + self.firstMatchChar = match_string[0] + except IndexError: + raise ValueError("null string passed to Literal; use Empty() instead") + self.errmsg = "Expected " + self.name + self.mayReturnEmpty = False + self.mayIndexError = False + + # Performance tuning: modify __class__ to select + # a parseImpl optimized for single-character check + if self.matchLen == 1 and type(self) is Literal: + self.__class__ = _SingleCharLiteral + + def _generateDefaultName(self): + return repr(self.match) + + def parseImpl(self, instring, loc, doActions=True): + if instring[loc] == self.firstMatchChar and instring.startswith( + self.match, loc + ): + return loc + self.matchLen, self.match + raise ParseException(instring, loc, self.errmsg, self) + + +class _SingleCharLiteral(Literal): + def parseImpl(self, instring, loc, doActions=True): + if instring[loc] == self.firstMatchChar: + return loc + 1, self.match + raise ParseException(instring, loc, self.errmsg, self) + + +ParserElement._literalStringClass = Literal + + +class Keyword(Token): + """ + Token to exactly match a specified string as a keyword, that is, + it must be immediately followed by a non-keyword character. Compare + with :class:`Literal`: + + - ``Literal("if")`` will match the leading ``'if'`` in + ``'ifAndOnlyIf'``. + - ``Keyword("if")`` will not; it will only match the leading + ``'if'`` in ``'if x=1'``, or ``'if(y==2)'`` + + Accepts two optional constructor arguments in addition to the + keyword string: + + - ``identChars`` is a string of characters that would be valid + identifier characters, defaulting to all alphanumerics + "_" and + "$" + - ``caseless`` allows case-insensitive matching, default is ``False``. + + Example:: + + Keyword("start").parse_string("start") # -> ['start'] + Keyword("start").parse_string("starting") # -> Exception + + For case-insensitive matching, use :class:`CaselessKeyword`. + """ + + DEFAULT_KEYWORD_CHARS = alphanums + "_$" + + def __init__( + self, + match_string: str = "", + ident_chars: OptionalType[str] = None, + caseless: bool = False, + *, + matchString: str = "", + identChars: OptionalType[str] = None, + ): + super().__init__() + identChars = identChars or ident_chars + if identChars is None: + identChars = Keyword.DEFAULT_KEYWORD_CHARS + match_string = matchString or match_string + self.match = match_string + self.matchLen = len(match_string) + try: + self.firstMatchChar = match_string[0] + except IndexError: + raise ValueError("null string passed to Keyword; use Empty() instead") + self.errmsg = "Expected {} {}".format(type(self).__name__, self.name) + self.mayReturnEmpty = False + self.mayIndexError = False + self.caseless = caseless + if caseless: + self.caselessmatch = match_string.upper() + identChars = identChars.upper() + self.identChars = set(identChars) + + def _generateDefaultName(self): + return repr(self.match) + + def parseImpl(self, instring, loc, doActions=True): + errmsg = self.errmsg + errloc = loc + if self.caseless: + if instring[loc : loc + self.matchLen].upper() == self.caselessmatch: + if loc == 0 or instring[loc - 1].upper() not in self.identChars: + if ( + loc >= len(instring) - self.matchLen + or instring[loc + self.matchLen].upper() not in self.identChars + ): + return loc + self.matchLen, self.match + else: + # followed by keyword char + errmsg += ", was immediately followed by keyword character" + errloc = loc + self.matchLen + else: + # preceded by keyword char + errmsg += ", keyword was immediately preceded by keyword character" + errloc = loc - 1 + # else no match just raise plain exception + + else: + if ( + instring[loc] == self.firstMatchChar + and self.matchLen == 1 + or instring.startswith(self.match, loc) + ): + if loc == 0 or instring[loc - 1] not in self.identChars: + if ( + loc >= len(instring) - self.matchLen + or instring[loc + self.matchLen] not in self.identChars + ): + return loc + self.matchLen, self.match + else: + # followed by keyword char + errmsg += ( + ", keyword was immediately followed by keyword character" + ) + errloc = loc + self.matchLen + else: + # preceded by keyword char + errmsg += ", keyword was immediately preceded by keyword character" + errloc = loc - 1 + # else no match just raise plain exception + + raise ParseException(instring, errloc, errmsg, self) + + @staticmethod + def set_default_keyword_chars(chars) -> None: + """ + Overrides the default characters used by :class:`Keyword` expressions. + """ + Keyword.DEFAULT_KEYWORD_CHARS = chars + + setDefaultKeywordChars = set_default_keyword_chars + + +class CaselessLiteral(Literal): + """ + Token to match a specified string, ignoring case of letters. + Note: the matched results will always be in the case of the given + match string, NOT the case of the input text. + + Example:: + + OneOrMore(CaselessLiteral("CMD")).parse_string("cmd CMD Cmd10") + # -> ['CMD', 'CMD', 'CMD'] + + (Contrast with example for :class:`CaselessKeyword`.) + """ + + def __init__(self, match_string: str = "", *, matchString: str = ""): + match_string = matchString or match_string + super().__init__(match_string.upper()) + # Preserve the defining literal. + self.returnString = match_string + self.errmsg = "Expected " + self.name + + def parseImpl(self, instring, loc, doActions=True): + if instring[loc : loc + self.matchLen].upper() == self.match: + return loc + self.matchLen, self.returnString + raise ParseException(instring, loc, self.errmsg, self) + + +class CaselessKeyword(Keyword): + """ + Caseless version of :class:`Keyword`. + + Example:: + + OneOrMore(CaselessKeyword("CMD")).parse_string("cmd CMD Cmd10") + # -> ['CMD', 'CMD'] + + (Contrast with example for :class:`CaselessLiteral`.) + """ + + def __init__( + self, + match_string: str = "", + ident_chars: OptionalType[str] = None, + *, + matchString: str = "", + identChars: OptionalType[str] = None, + ): + identChars = identChars or ident_chars + match_string = matchString or match_string + super().__init__(match_string, identChars, caseless=True) + + +class CloseMatch(Token): + """A variation on :class:`Literal` which matches "close" matches, + that is, strings with at most 'n' mismatching characters. + :class:`CloseMatch` takes parameters: + + - ``match_string`` - string to be matched + - ``caseless`` - a boolean indicating whether to ignore casing when comparing characters + - ``max_mismatches`` - (``default=1``) maximum number of + mismatches allowed to count as a match + + The results from a successful parse will contain the matched text + from the input string and the following named results: + + - ``mismatches`` - a list of the positions within the + match_string where mismatches were found + - ``original`` - the original match_string used to compare + against the input string + + If ``mismatches`` is an empty list, then the match was an exact + match. + + Example:: + + patt = CloseMatch("ATCATCGAATGGA") + patt.parse_string("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']}) + patt.parse_string("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1) + + # exact match + patt.parse_string("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']}) + + # close match allowing up to 2 mismatches + patt = CloseMatch("ATCATCGAATGGA", max_mismatches=2) + patt.parse_string("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']}) + """ + + def __init__( + self, + match_string: str, + max_mismatches: int = None, + *, + maxMismatches: int = 1, + caseless=False, + ): + maxMismatches = max_mismatches if max_mismatches is not None else maxMismatches + super().__init__() + self.match_string = match_string + self.maxMismatches = maxMismatches + self.errmsg = "Expected {!r} (with up to {} mismatches)".format( + self.match_string, self.maxMismatches + ) + self.caseless = caseless + self.mayIndexError = False + self.mayReturnEmpty = False + + def _generateDefaultName(self): + return "{}:{!r}".format(type(self).__name__, self.match_string) + + def parseImpl(self, instring, loc, doActions=True): + start = loc + instrlen = len(instring) + maxloc = start + len(self.match_string) + + if maxloc <= instrlen: + match_string = self.match_string + match_stringloc = 0 + mismatches = [] + maxMismatches = self.maxMismatches + + for match_stringloc, s_m in enumerate( + zip(instring[loc:maxloc], match_string) + ): + src, mat = s_m + if self.caseless: + src, mat = src.lower(), mat.lower() + + if src != mat: + mismatches.append(match_stringloc) + if len(mismatches) > maxMismatches: + break + else: + loc = start + match_stringloc + 1 + results = ParseResults([instring[start:loc]]) + results["original"] = match_string + results["mismatches"] = mismatches + return loc, results + + raise ParseException(instring, loc, self.errmsg, self) + + +class Word(Token): + """Token for matching words composed of allowed character sets. + Parameters: + - ``init_chars`` - string of all characters that should be used to + match as a word; "ABC" will match "AAA", "ABAB", "CBAC", etc.; + if ``body_chars`` is also specified, then this is the string of + initial characters + - ``body_chars`` - string of characters that + can be used for matching after a matched initial character as + given in ``init_chars``; if omitted, same as the initial characters + (default=``None``) + - ``min`` - minimum number of characters to match (default=1) + - ``max`` - maximum number of characters to match (default=0) + - ``exact`` - exact number of characters to match (default=0) + - ``as_keyword`` - match as a keyword (default=``False``) + - ``exclude_chars`` - characters that might be + found in the input ``body_chars`` string but which should not be + accepted for matching ;useful to define a word of all + printables except for one or two characters, for instance + (default=``None``) + + :class:`srange` is useful for defining custom character set strings + for defining :class:`Word` expressions, using range notation from + regular expression character sets. + + A common mistake is to use :class:`Word` to match a specific literal + string, as in ``Word("Address")``. Remember that :class:`Word` + uses the string argument to define *sets* of matchable characters. + This expression would match "Add", "AAA", "dAred", or any other word + made up of the characters 'A', 'd', 'r', 'e', and 's'. To match an + exact literal string, use :class:`Literal` or :class:`Keyword`. + + pyparsing includes helper strings for building Words: + + - :class:`alphas` + - :class:`nums` + - :class:`alphanums` + - :class:`hexnums` + - :class:`alphas8bit` (alphabetic characters in ASCII range 128-255 + - accented, tilded, umlauted, etc.) + - :class:`punc8bit` (non-alphabetic characters in ASCII range + 128-255 - currency, symbols, superscripts, diacriticals, etc.) + - :class:`printables` (any non-whitespace character) + + ``alphas``, ``nums``, and ``printables`` are also defined in several + Unicode sets - see :class:`pyparsing_unicode``. + + Example:: + + # a word composed of digits + integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9")) + + # a word with a leading capital, and zero or more lowercase + capital_word = Word(alphas.upper(), alphas.lower()) + + # hostnames are alphanumeric, with leading alpha, and '-' + hostname = Word(alphas, alphanums + '-') + + # roman numeral (not a strict parser, accepts invalid mix of characters) + roman = Word("IVXLCDM") + + # any string of non-whitespace characters, except for ',' + csv_value = Word(printables, exclude_chars=",") + """ + + def __init__( + self, + init_chars: str = "", + body_chars: OptionalType[str] = None, + min: int = 1, + max: int = 0, + exact: int = 0, + as_keyword: bool = False, + exclude_chars: OptionalType[str] = None, + *, + initChars: OptionalType[str] = None, + bodyChars: OptionalType[str] = None, + asKeyword: bool = False, + excludeChars: OptionalType[str] = None, + ): + initChars = initChars or init_chars + bodyChars = bodyChars or body_chars + asKeyword = asKeyword or as_keyword + excludeChars = excludeChars or exclude_chars + super().__init__() + if not initChars: + raise ValueError( + "invalid {}, initChars cannot be empty string".format( + type(self).__name__ + ) + ) + + initChars = set(initChars) + self.initChars = initChars + if excludeChars: + excludeChars = set(excludeChars) + initChars -= excludeChars + if bodyChars: + bodyChars = set(bodyChars) - excludeChars + self.initCharsOrig = "".join(sorted(initChars)) + + if bodyChars: + self.bodyCharsOrig = "".join(sorted(bodyChars)) + self.bodyChars = set(bodyChars) + else: + self.bodyCharsOrig = "".join(sorted(initChars)) + self.bodyChars = set(initChars) + + self.maxSpecified = max > 0 + + if min < 1: + raise ValueError( + "cannot specify a minimum length < 1; use Opt(Word()) if zero-length word is permitted" + ) + + self.minLen = min + + if max > 0: + self.maxLen = max + else: + self.maxLen = _MAX_INT + + if exact > 0: + self.maxLen = exact + self.minLen = exact + + self.errmsg = "Expected " + self.name + self.mayIndexError = False + self.asKeyword = asKeyword + + # see if we can make a regex for this Word + if " " not in self.initChars | self.bodyChars and (min == 1 and exact == 0): + if self.bodyChars == self.initChars: + if max == 0: + repeat = "+" + elif max == 1: + repeat = "" + else: + repeat = "{{{},{}}}".format( + self.minLen, "" if self.maxLen == _MAX_INT else self.maxLen + ) + self.reString = "[{}]{}".format( + _collapse_string_to_ranges(self.initChars), + repeat, + ) + elif len(self.initChars) == 1: + if max == 0: + repeat = "*" + else: + repeat = "{{0,{}}}".format(max - 1) + self.reString = "{}[{}]{}".format( + re.escape(self.initCharsOrig), + _collapse_string_to_ranges(self.bodyChars), + repeat, + ) + else: + if max == 0: + repeat = "*" + elif max == 2: + repeat = "" + else: + repeat = "{{0,{}}}".format(max - 1) + self.reString = "[{}][{}]{}".format( + _collapse_string_to_ranges(self.initChars), + _collapse_string_to_ranges(self.bodyChars), + repeat, + ) + if self.asKeyword: + self.reString = r"\b" + self.reString + r"\b" + + try: + self.re = re.compile(self.reString) + except re.error: + self.re = None + else: + self.re_match = self.re.match + self.__class__ = _WordRegex + + def _generateDefaultName(self): + def charsAsStr(s): + max_repr_len = 16 + s = _collapse_string_to_ranges(s, re_escape=False) + if len(s) > max_repr_len: + return s[: max_repr_len - 3] + "..." + else: + return s + + if self.initChars != self.bodyChars: + base = "W:({}, {})".format( + charsAsStr(self.initChars), charsAsStr(self.bodyChars) + ) + else: + base = "W:({})".format(charsAsStr(self.initChars)) + + # add length specification + if self.minLen > 1 or self.maxLen != _MAX_INT: + if self.minLen == self.maxLen: + if self.minLen == 1: + return base[2:] + else: + return base + "{{{}}}".format(self.minLen) + elif self.maxLen == _MAX_INT: + return base + "{{{},...}}".format(self.minLen) + else: + return base + "{{{},{}}}".format(self.minLen, self.maxLen) + return base + + def parseImpl(self, instring, loc, doActions=True): + if instring[loc] not in self.initChars: + raise ParseException(instring, loc, self.errmsg, self) + + start = loc + loc += 1 + instrlen = len(instring) + bodychars = self.bodyChars + maxloc = start + self.maxLen + maxloc = min(maxloc, instrlen) + while loc < maxloc and instring[loc] in bodychars: + loc += 1 + + throwException = False + if loc - start < self.minLen: + throwException = True + elif self.maxSpecified and loc < instrlen and instring[loc] in bodychars: + throwException = True + elif self.asKeyword: + if ( + start > 0 + and instring[start - 1] in bodychars + or loc < instrlen + and instring[loc] in bodychars + ): + throwException = True + + if throwException: + raise ParseException(instring, loc, self.errmsg, self) + + return loc, instring[start:loc] + + +class _WordRegex(Word): + def parseImpl(self, instring, loc, doActions=True): + result = self.re_match(instring, loc) + if not result: + raise ParseException(instring, loc, self.errmsg, self) + + loc = result.end() + return loc, result.group() + + +class Char(_WordRegex): + """A short-cut class for defining :class:`Word` ``(characters, exact=1)``, + when defining a match of any single character in a string of + characters. + """ + + def __init__( + self, + charset: str, + as_keyword: bool = False, + exclude_chars: OptionalType[str] = None, + *, + asKeyword: bool = False, + excludeChars: OptionalType[str] = None, + ): + asKeyword = asKeyword or as_keyword + excludeChars = excludeChars or exclude_chars + super().__init__( + charset, exact=1, asKeyword=asKeyword, excludeChars=excludeChars + ) + self.reString = "[{}]".format(_collapse_string_to_ranges(self.initChars)) + if asKeyword: + self.reString = r"\b{}\b".format(self.reString) + self.re = re.compile(self.reString) + self.re_match = self.re.match + + +class Regex(Token): + r"""Token for matching strings that match a given regular + expression. Defined with string specifying the regular expression in + a form recognized by the stdlib Python `re module `_. + If the given regex contains named groups (defined using ``(?P...)``), + these will be preserved as named :class:`ParseResults`. + + If instead of the Python stdlib ``re`` module you wish to use a different RE module + (such as the ``regex`` module), you can do so by building your ``Regex`` object with + a compiled RE that was compiled using ``regex``. + + Example:: + + realnum = Regex(r"[+-]?\d+\.\d*") + # ref: https://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression + roman = Regex(r"M{0,4}(CM|CD|D?{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})") + + # named fields in a regex will be returned as named results + date = Regex(r'(?P\d{4})-(?P\d\d?)-(?P\d\d?)') + + # the Regex class will accept re's compiled using the regex module + import regex + parser = pp.Regex(regex.compile(r'[0-9]')) + """ + + def __init__( + self, + pattern: Any, + flags: Union[re.RegexFlag, int] = 0, + as_group_list: bool = False, + as_match: bool = False, + *, + asGroupList: bool = False, + asMatch: bool = False, + ): + """The parameters ``pattern`` and ``flags`` are passed + to the ``re.compile()`` function as-is. See the Python + `re module `_ module for an + explanation of the acceptable patterns and flags. + """ + super().__init__() + asGroupList = asGroupList or as_group_list + asMatch = asMatch or as_match + + if isinstance(pattern, str_type): + if not pattern: + raise ValueError("null string passed to Regex; use Empty() instead") + + self._re = None + self.reString = self.pattern = pattern + self.flags = flags + + elif hasattr(pattern, "pattern") and hasattr(pattern, "match"): + self._re = pattern + self.pattern = self.reString = pattern.pattern + self.flags = flags + + else: + raise TypeError( + "Regex may only be constructed with a string or a compiled RE object" + ) + + self.errmsg = "Expected " + self.name + self.mayIndexError = False + self.asGroupList = asGroupList + self.asMatch = asMatch + if self.asGroupList: + self.parseImpl = self.parseImplAsGroupList + if self.asMatch: + self.parseImpl = self.parseImplAsMatch + + @cached_property + def re(self): + if self._re: + return self._re + else: + try: + return re.compile(self.pattern, self.flags) + except re.error: + raise ValueError( + "invalid pattern ({!r}) passed to Regex".format(self.pattern) + ) + + @cached_property + def re_match(self): + return self.re.match + + @cached_property + def mayReturnEmpty(self): + return self.re_match("") is not None + + def _generateDefaultName(self): + return "Re:({})".format(repr(self.pattern).replace("\\\\", "\\")) + + def parseImpl(self, instring, loc, doActions=True): + result = self.re_match(instring, loc) + if not result: + raise ParseException(instring, loc, self.errmsg, self) + + loc = result.end() + ret = ParseResults(result.group()) + d = result.groupdict() + if d: + for k, v in d.items(): + ret[k] = v + return loc, ret + + def parseImplAsGroupList(self, instring, loc, doActions=True): + result = self.re_match(instring, loc) + if not result: + raise ParseException(instring, loc, self.errmsg, self) + + loc = result.end() + ret = result.groups() + return loc, ret + + def parseImplAsMatch(self, instring, loc, doActions=True): + result = self.re_match(instring, loc) + if not result: + raise ParseException(instring, loc, self.errmsg, self) + + loc = result.end() + ret = result + return loc, ret + + def sub(self, repl: str) -> ParserElement: + r""" + Return :class:`Regex` with an attached parse action to transform the parsed + result as if called using `re.sub(expr, repl, string) `_. + + Example:: + + make_html = Regex(r"(\w+):(.*?):").sub(r"<\1>\2") + print(make_html.transform_string("h1:main title:")) + # prints "

main title

" + """ + if self.asGroupList: + raise TypeError("cannot use sub() with Regex(asGroupList=True)") + + if self.asMatch and callable(repl): + raise TypeError("cannot use sub() with a callable with Regex(asMatch=True)") + + if self.asMatch: + + def pa(tokens): + return tokens[0].expand(repl) + + else: + + def pa(tokens): + return self.re.sub(repl, tokens[0]) + + return self.add_parse_action(pa) + + +class QuotedString(Token): + r""" + Token for matching strings that are delimited by quoting characters. + + Defined with the following parameters: + + - ``quote_char`` - string of one or more characters defining the + quote delimiting string + - ``esc_char`` - character to re_escape quotes, typically backslash + (default= ``None``) + - ``esc_quote`` - special quote sequence to re_escape an embedded quote + string (such as SQL's ``""`` to re_escape an embedded ``"``) + (default= ``None``) + - ``multiline`` - boolean indicating whether quotes can span + multiple lines (default= ``False``) + - ``unquote_results`` - boolean indicating whether the matched text + should be unquoted (default= ``True``) + - ``end_quote_char`` - string of one or more characters defining the + end of the quote delimited string (default= ``None`` => same as + quote_char) + - ``convert_whitespace_escapes`` - convert escaped whitespace + (``'\t'``, ``'\n'``, etc.) to actual whitespace + (default= ``True``) + + Example:: + + qs = QuotedString('"') + print(qs.search_string('lsjdf "This is the quote" sldjf')) + complex_qs = QuotedString('{{', end_quote_char='}}') + print(complex_qs.search_string('lsjdf {{This is the "quote"}} sldjf')) + sql_qs = QuotedString('"', esc_quote='""') + print(sql_qs.search_string('lsjdf "This is the quote with ""embedded"" quotes" sldjf')) + + prints:: + + [['This is the quote']] + [['This is the "quote"']] + [['This is the quote with "embedded" quotes']] + """ + ws_map = ((r"\t", "\t"), (r"\n", "\n"), (r"\f", "\f"), (r"\r", "\r")) + + def __init__( + self, + quote_char: str = "", + esc_char: OptionalType[str] = None, + esc_quote: OptionalType[str] = None, + multiline: bool = False, + unquote_results: bool = True, + end_quote_char: OptionalType[str] = None, + convert_whitespace_escapes: bool = True, + *, + quoteChar: str = "", + escChar: OptionalType[str] = None, + escQuote: OptionalType[str] = None, + unquoteResults: bool = True, + endQuoteChar: OptionalType[str] = None, + convertWhitespaceEscapes: bool = True, + ): + super().__init__() + escChar = escChar or esc_char + escQuote = escQuote or esc_quote + unquoteResults = unquoteResults and unquote_results + endQuoteChar = endQuoteChar or end_quote_char + convertWhitespaceEscapes = ( + convertWhitespaceEscapes and convert_whitespace_escapes + ) + quote_char = quoteChar or quote_char + + # remove white space from quote chars - wont work anyway + quote_char = quote_char.strip() + if not quote_char: + raise ValueError("quote_char cannot be the empty string") + + if endQuoteChar is None: + endQuoteChar = quote_char + else: + endQuoteChar = endQuoteChar.strip() + if not endQuoteChar: + raise ValueError("endQuoteChar cannot be the empty string") + + self.quoteChar = quote_char + self.quoteCharLen = len(quote_char) + self.firstQuoteChar = quote_char[0] + self.endQuoteChar = endQuoteChar + self.endQuoteCharLen = len(endQuoteChar) + self.escChar = escChar + self.escQuote = escQuote + self.unquoteResults = unquoteResults + self.convertWhitespaceEscapes = convertWhitespaceEscapes + + sep = "" + inner_pattern = "" + + if escQuote: + inner_pattern += r"{}(?:{})".format(sep, re.escape(escQuote)) + sep = "|" + + if escChar: + inner_pattern += r"{}(?:{}.)".format(sep, re.escape(escChar)) + sep = "|" + self.escCharReplacePattern = re.escape(self.escChar) + "(.)" + + if len(self.endQuoteChar) > 1: + inner_pattern += ( + "{}(?:".format(sep) + + "|".join( + "(?:{}(?!{}))".format( + re.escape(self.endQuoteChar[:i]), + re.escape(self.endQuoteChar[i:]), + ) + for i in range(len(self.endQuoteChar) - 1, 0, -1) + ) + + ")" + ) + sep = "|" + + if multiline: + self.flags = re.MULTILINE | re.DOTALL + inner_pattern += r"{}(?:[^{}{}])".format( + sep, + _escape_regex_range_chars(self.endQuoteChar[0]), + (_escape_regex_range_chars(escChar) if escChar is not None else ""), + ) + else: + self.flags = 0 + inner_pattern += r"{}(?:[^{}\n\r{}])".format( + sep, + _escape_regex_range_chars(self.endQuoteChar[0]), + (_escape_regex_range_chars(escChar) if escChar is not None else ""), + ) + + self.pattern = "".join( + [ + re.escape(self.quoteChar), + "(?:", + inner_pattern, + ")*", + re.escape(self.endQuoteChar), + ] + ) + + try: + self.re = re.compile(self.pattern, self.flags) + self.reString = self.pattern + self.re_match = self.re.match + except re.error: + raise ValueError( + "invalid pattern {!r} passed to Regex".format(self.pattern) + ) + + self.errmsg = "Expected " + self.name + self.mayIndexError = False + self.mayReturnEmpty = True + + def _generateDefaultName(self): + if self.quoteChar == self.endQuoteChar and isinstance(self.quoteChar, str_type): + return "string enclosed in {!r}".format(self.quoteChar) + + return "quoted string, starting with {} ending with {}".format( + self.quoteChar, self.endQuoteChar + ) + + def parseImpl(self, instring, loc, doActions=True): + result = ( + instring[loc] == self.firstQuoteChar + and self.re_match(instring, loc) + or None + ) + if not result: + raise ParseException(instring, loc, self.errmsg, self) + + loc = result.end() + ret = result.group() + + if self.unquoteResults: + + # strip off quotes + ret = ret[self.quoteCharLen : -self.endQuoteCharLen] + + if isinstance(ret, str_type): + # replace escaped whitespace + if "\\" in ret and self.convertWhitespaceEscapes: + for wslit, wschar in self.ws_map: + ret = ret.replace(wslit, wschar) + + # replace escaped characters + if self.escChar: + ret = re.sub(self.escCharReplacePattern, r"\g<1>", ret) + + # replace escaped quotes + if self.escQuote: + ret = ret.replace(self.escQuote, self.endQuoteChar) + + return loc, ret + + +class CharsNotIn(Token): + """Token for matching words composed of characters *not* in a given + set (will include whitespace in matched characters if not listed in + the provided exclusion set - see example). Defined with string + containing all disallowed characters, and an optional minimum, + maximum, and/or exact length. The default value for ``min`` is + 1 (a minimum value < 1 is not valid); the default values for + ``max`` and ``exact`` are 0, meaning no maximum or exact + length restriction. + + Example:: + + # define a comma-separated-value as anything that is not a ',' + csv_value = CharsNotIn(',') + print(delimited_list(csv_value).parse_string("dkls,lsdkjf,s12 34,@!#,213")) + + prints:: + + ['dkls', 'lsdkjf', 's12 34', '@!#', '213'] + """ + + def __init__( + self, + not_chars: str = "", + min: int = 1, + max: int = 0, + exact: int = 0, + *, + notChars: str = "", + ): + super().__init__() + self.skipWhitespace = False + self.notChars = not_chars or notChars + self.notCharsSet = set(self.notChars) + + if min < 1: + raise ValueError( + "cannot specify a minimum length < 1; use " + "Opt(CharsNotIn()) if zero-length char group is permitted" + ) + + self.minLen = min + + if max > 0: + self.maxLen = max + else: + self.maxLen = _MAX_INT + + if exact > 0: + self.maxLen = exact + self.minLen = exact + + self.errmsg = "Expected " + self.name + self.mayReturnEmpty = self.minLen == 0 + self.mayIndexError = False + + def _generateDefaultName(self): + not_chars_str = _collapse_string_to_ranges(self.notChars) + if len(not_chars_str) > 16: + return "!W:({}...)".format(self.notChars[: 16 - 3]) + else: + return "!W:({})".format(self.notChars) + + def parseImpl(self, instring, loc, doActions=True): + notchars = self.notCharsSet + if instring[loc] in notchars: + raise ParseException(instring, loc, self.errmsg, self) + + start = loc + loc += 1 + maxlen = min(start + self.maxLen, len(instring)) + while loc < maxlen and instring[loc] not in notchars: + loc += 1 + + if loc - start < self.minLen: + raise ParseException(instring, loc, self.errmsg, self) + + return loc, instring[start:loc] + + +class White(Token): + """Special matching class for matching whitespace. Normally, + whitespace is ignored by pyparsing grammars. This class is included + when some whitespace structures are significant. Define with + a string containing the whitespace characters to be matched; default + is ``" \\t\\r\\n"``. Also takes optional ``min``, + ``max``, and ``exact`` arguments, as defined for the + :class:`Word` class. + """ + + whiteStrs = { + " ": "", + "\t": "", + "\n": "", + "\r": "", + "\f": "", + "\u00A0": "", + "\u1680": "", + "\u180E": "", + "\u2000": "", + "\u2001": "", + "\u2002": "", + "\u2003": "", + "\u2004": "", + "\u2005": "", + "\u2006": "", + "\u2007": "", + "\u2008": "", + "\u2009": "", + "\u200A": "", + "\u200B": "", + "\u202F": "", + "\u205F": "", + "\u3000": "", + } + + def __init__(self, ws: str = " \t\r\n", min: int = 1, max: int = 0, exact: int = 0): + super().__init__() + self.matchWhite = ws + self.set_whitespace_chars( + "".join(c for c in self.whiteStrs if c not in self.matchWhite), + copy_defaults=True, + ) + # self.leave_whitespace() + self.mayReturnEmpty = True + self.errmsg = "Expected " + self.name + + self.minLen = min + + if max > 0: + self.maxLen = max + else: + self.maxLen = _MAX_INT + + if exact > 0: + self.maxLen = exact + self.minLen = exact + + def _generateDefaultName(self): + return "".join(White.whiteStrs[c] for c in self.matchWhite) + + def parseImpl(self, instring, loc, doActions=True): + if instring[loc] not in self.matchWhite: + raise ParseException(instring, loc, self.errmsg, self) + start = loc + loc += 1 + maxloc = start + self.maxLen + maxloc = min(maxloc, len(instring)) + while loc < maxloc and instring[loc] in self.matchWhite: + loc += 1 + + if loc - start < self.minLen: + raise ParseException(instring, loc, self.errmsg, self) + + return loc, instring[start:loc] + + +class PositionToken(Token): + def __init__(self): + super().__init__() + self.mayReturnEmpty = True + self.mayIndexError = False + + +class GoToColumn(PositionToken): + """Token to advance to a specific column of input text; useful for + tabular report scraping. + """ + + def __init__(self, colno: int): + super().__init__() + self.col = colno + + def preParse(self, instring, loc): + if col(loc, instring) != self.col: + instrlen = len(instring) + if self.ignoreExprs: + loc = self._skipIgnorables(instring, loc) + while ( + loc < instrlen + and instring[loc].isspace() + and col(loc, instring) != self.col + ): + loc += 1 + return loc + + def parseImpl(self, instring, loc, doActions=True): + thiscol = col(loc, instring) + if thiscol > self.col: + raise ParseException(instring, loc, "Text not in expected column", self) + newloc = loc + self.col - thiscol + ret = instring[loc:newloc] + return newloc, ret + + +class LineStart(PositionToken): + r"""Matches if current position is at the beginning of a line within + the parse string + + Example:: + + test = '''\ + AAA this line + AAA and this line + AAA but not this one + B AAA and definitely not this one + ''' + + for t in (LineStart() + 'AAA' + restOfLine).search_string(test): + print(t) + + prints:: + + ['AAA', ' this line'] + ['AAA', ' and this line'] + + """ + + def __init__(self): + super().__init__() + self.leave_whitespace() + self.orig_whiteChars = set() | self.whiteChars + self.whiteChars.discard("\n") + self.skipper = Empty().set_whitespace_chars(self.whiteChars) + self.errmsg = "Expected start of line" + + def preParse(self, instring, loc): + if loc == 0: + return loc + else: + ret = self.skipper.preParse(instring, loc) + if "\n" in self.orig_whiteChars: + while instring[ret : ret + 1] == "\n": + ret = self.skipper.preParse(instring, ret + 1) + return ret + + def parseImpl(self, instring, loc, doActions=True): + if col(loc, instring) == 1: + return loc, [] + raise ParseException(instring, loc, self.errmsg, self) + + +class LineEnd(PositionToken): + """Matches if current position is at the end of a line within the + parse string + """ + + def __init__(self): + super().__init__() + self.whiteChars.discard("\n") + self.set_whitespace_chars(self.whiteChars, copy_defaults=False) + self.errmsg = "Expected end of line" + + def parseImpl(self, instring, loc, doActions=True): + if loc < len(instring): + if instring[loc] == "\n": + return loc + 1, "\n" + else: + raise ParseException(instring, loc, self.errmsg, self) + elif loc == len(instring): + return loc + 1, [] + else: + raise ParseException(instring, loc, self.errmsg, self) + + +class StringStart(PositionToken): + """Matches if current position is at the beginning of the parse + string + """ + + def __init__(self): + super().__init__() + self.errmsg = "Expected start of text" + + def parseImpl(self, instring, loc, doActions=True): + if loc != 0: + # see if entire string up to here is just whitespace and ignoreables + if loc != self.preParse(instring, 0): + raise ParseException(instring, loc, self.errmsg, self) + return loc, [] + + +class StringEnd(PositionToken): + """ + Matches if current position is at the end of the parse string + """ + + def __init__(self): + super().__init__() + self.errmsg = "Expected end of text" + + def parseImpl(self, instring, loc, doActions=True): + if loc < len(instring): + raise ParseException(instring, loc, self.errmsg, self) + elif loc == len(instring): + return loc + 1, [] + elif loc > len(instring): + return loc, [] + else: + raise ParseException(instring, loc, self.errmsg, self) + + +class WordStart(PositionToken): + """Matches if the current position is at the beginning of a + :class:`Word`, and is not preceded by any character in a given + set of ``word_chars`` (default= ``printables``). To emulate the + ``\b`` behavior of regular expressions, use + ``WordStart(alphanums)``. ``WordStart`` will also match at + the beginning of the string being parsed, or at the beginning of + a line. + """ + + def __init__(self, word_chars: str = printables, *, wordChars: str = printables): + wordChars = word_chars if wordChars == printables else wordChars + super().__init__() + self.wordChars = set(wordChars) + self.errmsg = "Not at the start of a word" + + def parseImpl(self, instring, loc, doActions=True): + if loc != 0: + if ( + instring[loc - 1] in self.wordChars + or instring[loc] not in self.wordChars + ): + raise ParseException(instring, loc, self.errmsg, self) + return loc, [] + + +class WordEnd(PositionToken): + """Matches if the current position is at the end of a :class:`Word`, + and is not followed by any character in a given set of ``word_chars`` + (default= ``printables``). To emulate the ``\b`` behavior of + regular expressions, use ``WordEnd(alphanums)``. ``WordEnd`` + will also match at the end of the string being parsed, or at the end + of a line. + """ + + def __init__(self, word_chars: str = printables, *, wordChars: str = printables): + wordChars = word_chars if wordChars == printables else wordChars + super().__init__() + self.wordChars = set(wordChars) + self.skipWhitespace = False + self.errmsg = "Not at the end of a word" + + def parseImpl(self, instring, loc, doActions=True): + instrlen = len(instring) + if instrlen > 0 and loc < instrlen: + if ( + instring[loc] in self.wordChars + or instring[loc - 1] not in self.wordChars + ): + raise ParseException(instring, loc, self.errmsg, self) + return loc, [] + + +class ParseExpression(ParserElement): + """Abstract subclass of ParserElement, for combining and + post-processing parsed tokens. + """ + + def __init__(self, exprs: IterableType[ParserElement], savelist: bool = False): + super().__init__(savelist) + self.exprs: List[ParserElement] + if isinstance(exprs, _generatorType): + exprs = list(exprs) + + if isinstance(exprs, str_type): + self.exprs = [self._literalStringClass(exprs)] + elif isinstance(exprs, ParserElement): + self.exprs = [exprs] + elif isinstance(exprs, Iterable): + exprs = list(exprs) + # if sequence of strings provided, wrap with Literal + if any(isinstance(expr, str_type) for expr in exprs): + exprs = ( + self._literalStringClass(e) if isinstance(e, str_type) else e + for e in exprs + ) + self.exprs = list(exprs) + else: + try: + self.exprs = list(exprs) + except TypeError: + self.exprs = [exprs] + self.callPreparse = False + + def recurse(self) -> Sequence[ParserElement]: + return self.exprs[:] + + def append(self, other) -> ParserElement: + self.exprs.append(other) + self._defaultName = None + return self + + def leave_whitespace(self, recursive: bool = True) -> ParserElement: + """ + Extends ``leave_whitespace`` defined in base class, and also invokes ``leave_whitespace`` on + all contained expressions. + """ + super().leave_whitespace(recursive) + + if recursive: + self.exprs = [e.copy() for e in self.exprs] + for e in self.exprs: + e.leave_whitespace(recursive) + return self + + def ignore_whitespace(self, recursive: bool = True) -> ParserElement: + """ + Extends ``ignore_whitespace`` defined in base class, and also invokes ``leave_whitespace`` on + all contained expressions. + """ + super().ignore_whitespace(recursive) + if recursive: + self.exprs = [e.copy() for e in self.exprs] + for e in self.exprs: + e.ignore_whitespace(recursive) + return self + + def ignore(self, other) -> ParserElement: + if isinstance(other, Suppress): + if other not in self.ignoreExprs: + super().ignore(other) + for e in self.exprs: + e.ignore(self.ignoreExprs[-1]) + else: + super().ignore(other) + for e in self.exprs: + e.ignore(self.ignoreExprs[-1]) + return self + + def _generateDefaultName(self): + return "{}:({})".format(self.__class__.__name__, str(self.exprs)) + + def streamline(self) -> ParserElement: + if self.streamlined: + return self + + super().streamline() + + for e in self.exprs: + e.streamline() + + # collapse nested :class:`And`'s of the form ``And(And(And(a, b), c), d)`` to ``And(a, b, c, d)`` + # but only if there are no parse actions or resultsNames on the nested And's + # (likewise for :class:`Or`'s and :class:`MatchFirst`'s) + if len(self.exprs) == 2: + other = self.exprs[0] + if ( + isinstance(other, self.__class__) + and not other.parseAction + and other.resultsName is None + and not other.debug + ): + self.exprs = other.exprs[:] + [self.exprs[1]] + self._defaultName = None + self.mayReturnEmpty |= other.mayReturnEmpty + self.mayIndexError |= other.mayIndexError + + other = self.exprs[-1] + if ( + isinstance(other, self.__class__) + and not other.parseAction + and other.resultsName is None + and not other.debug + ): + self.exprs = self.exprs[:-1] + other.exprs[:] + self._defaultName = None + self.mayReturnEmpty |= other.mayReturnEmpty + self.mayIndexError |= other.mayIndexError + + self.errmsg = "Expected " + str(self) + + return self + + def validate(self, validateTrace=None) -> None: + tmp = (validateTrace if validateTrace is not None else [])[:] + [self] + for e in self.exprs: + e.validate(tmp) + self._checkRecursion([]) + + def copy(self) -> ParserElement: + ret = super().copy() + ret.exprs = [e.copy() for e in self.exprs] + return ret + + def _setResultsName(self, name, listAllMatches=False): + if ( + __diag__.warn_ungrouped_named_tokens_in_collection + and Diagnostics.warn_ungrouped_named_tokens_in_collection + not in self.suppress_warnings_ + ): + for e in self.exprs: + if ( + isinstance(e, ParserElement) + and e.resultsName + and Diagnostics.warn_ungrouped_named_tokens_in_collection + not in e.suppress_warnings_ + ): + warnings.warn( + "{}: setting results name {!r} on {} expression " + "collides with {!r} on contained expression".format( + "warn_ungrouped_named_tokens_in_collection", + name, + type(self).__name__, + e.resultsName, + ), + stacklevel=3, + ) + + return super()._setResultsName(name, listAllMatches) + + ignoreWhitespace = ignore_whitespace + leaveWhitespace = leave_whitespace + + +class And(ParseExpression): + """ + Requires all given :class:`ParseExpression` s to be found in the given order. + Expressions may be separated by whitespace. + May be constructed using the ``'+'`` operator. + May also be constructed using the ``'-'`` operator, which will + suppress backtracking. + + Example:: + + integer = Word(nums) + name_expr = OneOrMore(Word(alphas)) + + expr = And([integer("id"), name_expr("name"), integer("age")]) + # more easily written as: + expr = integer("id") + name_expr("name") + integer("age") + """ + + class _ErrorStop(Empty): + def __init__(self, *args, **kwargs): + super().__init__(*args, **kwargs) + self.leave_whitespace() + + def _generateDefaultName(self): + return "-" + + def __init__(self, exprs_arg: IterableType[ParserElement], savelist: bool = True): + exprs: List[ParserElement] = list(exprs_arg) + if exprs and Ellipsis in exprs: + tmp = [] + for i, expr in enumerate(exprs): + if expr is Ellipsis: + if i < len(exprs) - 1: + skipto_arg: ParserElement = (Empty() + exprs[i + 1]).exprs[-1] + tmp.append(SkipTo(skipto_arg)("_skipped*")) + else: + raise Exception( + "cannot construct And with sequence ending in ..." + ) + else: + tmp.append(expr) + exprs[:] = tmp + super().__init__(exprs, savelist) + if self.exprs: + self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs) + if not isinstance(self.exprs[0], White): + self.set_whitespace_chars( + self.exprs[0].whiteChars, + copy_defaults=self.exprs[0].copyDefaultWhiteChars, + ) + self.skipWhitespace = self.exprs[0].skipWhitespace + else: + self.skipWhitespace = False + else: + self.mayReturnEmpty = True + self.callPreparse = True + + def streamline(self) -> ParserElement: + # collapse any _PendingSkip's + if self.exprs: + if any( + isinstance(e, ParseExpression) + and e.exprs + and isinstance(e.exprs[-1], _PendingSkip) + for e in self.exprs[:-1] + ): + for i, e in enumerate(self.exprs[:-1]): + if e is None: + continue + if ( + isinstance(e, ParseExpression) + and e.exprs + and isinstance(e.exprs[-1], _PendingSkip) + ): + e.exprs[-1] = e.exprs[-1] + self.exprs[i + 1] + self.exprs[i + 1] = None + self.exprs = [e for e in self.exprs if e is not None] + + super().streamline() + + # link any IndentedBlocks to the prior expression + for prev, cur in zip(self.exprs, self.exprs[1:]): + # traverse cur or any first embedded expr of cur looking for an IndentedBlock + # (but watch out for recursive grammar) + seen = set() + while cur: + if id(cur) in seen: + break + seen.add(id(cur)) + if isinstance(cur, IndentedBlock): + prev.add_parse_action( + lambda s, l, t, cur_=cur: setattr( + cur_, "parent_anchor", col(l, s) + ) + ) + break + subs = cur.recurse() + cur = next(iter(subs), None) + + self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs) + return self + + def parseImpl(self, instring, loc, doActions=True): + # pass False as callPreParse arg to _parse for first element, since we already + # pre-parsed the string as part of our And pre-parsing + loc, resultlist = self.exprs[0]._parse( + instring, loc, doActions, callPreParse=False + ) + errorStop = False + for e in self.exprs[1:]: + # if isinstance(e, And._ErrorStop): + if type(e) is And._ErrorStop: + errorStop = True + continue + if errorStop: + try: + loc, exprtokens = e._parse(instring, loc, doActions) + except ParseSyntaxException: + raise + except ParseBaseException as pe: + pe.__traceback__ = None + raise ParseSyntaxException._from_exception(pe) + except IndexError: + raise ParseSyntaxException( + instring, len(instring), self.errmsg, self + ) + else: + loc, exprtokens = e._parse(instring, loc, doActions) + if exprtokens or exprtokens.haskeys(): + resultlist += exprtokens + return loc, resultlist + + def __iadd__(self, other): + if isinstance(other, str_type): + other = self._literalStringClass(other) + return self.append(other) # And([self, other]) + + def _checkRecursion(self, parseElementList): + subRecCheckList = parseElementList[:] + [self] + for e in self.exprs: + e._checkRecursion(subRecCheckList) + if not e.mayReturnEmpty: + break + + def _generateDefaultName(self): + inner = " ".join(str(e) for e in self.exprs) + # strip off redundant inner {}'s + while len(inner) > 1 and inner[0 :: len(inner) - 1] == "{}": + inner = inner[1:-1] + return "{" + inner + "}" + + +class Or(ParseExpression): + """Requires that at least one :class:`ParseExpression` is found. If + two expressions match, the expression that matches the longest + string will be used. May be constructed using the ``'^'`` + operator. + + Example:: + + # construct Or using '^' operator + + number = Word(nums) ^ Combine(Word(nums) + '.' + Word(nums)) + print(number.search_string("123 3.1416 789")) + + prints:: + + [['123'], ['3.1416'], ['789']] + """ + + def __init__(self, exprs: IterableType[ParserElement], savelist: bool = False): + super().__init__(exprs, savelist) + if self.exprs: + self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs) + self.skipWhitespace = all(e.skipWhitespace for e in self.exprs) + else: + self.mayReturnEmpty = True + + def streamline(self) -> ParserElement: + super().streamline() + if self.exprs: + self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs) + self.saveAsList = any(e.saveAsList for e in self.exprs) + self.skipWhitespace = all( + e.skipWhitespace and not isinstance(e, White) for e in self.exprs + ) + else: + self.saveAsList = False + return self + + def parseImpl(self, instring, loc, doActions=True): + maxExcLoc = -1 + maxException = None + matches = [] + fatals = [] + if all(e.callPreparse for e in self.exprs): + loc = self.preParse(instring, loc) + for e in self.exprs: + try: + loc2 = e.try_parse(instring, loc, raise_fatal=True) + except ParseFatalException as pfe: + pfe.__traceback__ = None + pfe.parserElement = e + fatals.append(pfe) + maxException = None + maxExcLoc = -1 + except ParseException as err: + if not fatals: + err.__traceback__ = None + if err.loc > maxExcLoc: + maxException = err + maxExcLoc = err.loc + except IndexError: + if len(instring) > maxExcLoc: + maxException = ParseException( + instring, len(instring), e.errmsg, self + ) + maxExcLoc = len(instring) + else: + # save match among all matches, to retry longest to shortest + matches.append((loc2, e)) + + if matches: + # re-evaluate all matches in descending order of length of match, in case attached actions + # might change whether or how much they match of the input. + matches.sort(key=itemgetter(0), reverse=True) + + if not doActions: + # no further conditions or parse actions to change the selection of + # alternative, so the first match will be the best match + best_expr = matches[0][1] + return best_expr._parse(instring, loc, doActions) + + longest = -1, None + for loc1, expr1 in matches: + if loc1 <= longest[0]: + # already have a longer match than this one will deliver, we are done + return longest + + try: + loc2, toks = expr1._parse(instring, loc, doActions) + except ParseException as err: + err.__traceback__ = None + if err.loc > maxExcLoc: + maxException = err + maxExcLoc = err.loc + else: + if loc2 >= loc1: + return loc2, toks + # didn't match as much as before + elif loc2 > longest[0]: + longest = loc2, toks + + if longest != (-1, None): + return longest + + if fatals: + if len(fatals) > 1: + fatals.sort(key=lambda e: -e.loc) + if fatals[0].loc == fatals[1].loc: + fatals.sort(key=lambda e: (-e.loc, -len(str(e.parserElement)))) + max_fatal = fatals[0] + raise max_fatal + + if maxException is not None: + maxException.msg = self.errmsg + raise maxException + else: + raise ParseException( + instring, loc, "no defined alternatives to match", self + ) + + def __ixor__(self, other): + if isinstance(other, str_type): + other = self._literalStringClass(other) + return self.append(other) # Or([self, other]) + + def _generateDefaultName(self): + return "{" + " ^ ".join(str(e) for e in self.exprs) + "}" + + def _setResultsName(self, name, listAllMatches=False): + if ( + __diag__.warn_multiple_tokens_in_named_alternation + and Diagnostics.warn_multiple_tokens_in_named_alternation + not in self.suppress_warnings_ + ): + if any( + isinstance(e, And) + and Diagnostics.warn_multiple_tokens_in_named_alternation + not in e.suppress_warnings_ + for e in self.exprs + ): + warnings.warn( + "{}: setting results name {!r} on {} expression " + "will return a list of all parsed tokens in an And alternative, " + "in prior versions only the first token was returned; enclose " + "contained argument in Group".format( + "warn_multiple_tokens_in_named_alternation", + name, + type(self).__name__, + ), + stacklevel=3, + ) + + return super()._setResultsName(name, listAllMatches) + + +class MatchFirst(ParseExpression): + """Requires that at least one :class:`ParseExpression` is found. If + more than one expression matches, the first one listed is the one that will + match. May be constructed using the ``'|'`` operator. + + Example:: + + # construct MatchFirst using '|' operator + + # watch the order of expressions to match + number = Word(nums) | Combine(Word(nums) + '.' + Word(nums)) + print(number.search_string("123 3.1416 789")) # Fail! -> [['123'], ['3'], ['1416'], ['789']] + + # put more selective expression first + number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums) + print(number.search_string("123 3.1416 789")) # Better -> [['123'], ['3.1416'], ['789']] + """ + + def __init__(self, exprs: IterableType[ParserElement], savelist: bool = False): + super().__init__(exprs, savelist) + if self.exprs: + self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs) + self.skipWhitespace = all(e.skipWhitespace for e in self.exprs) + else: + self.mayReturnEmpty = True + + def streamline(self) -> ParserElement: + if self.streamlined: + return self + + super().streamline() + if self.exprs: + self.saveAsList = any(e.saveAsList for e in self.exprs) + self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs) + self.skipWhitespace = all( + e.skipWhitespace and not isinstance(e, White) for e in self.exprs + ) + else: + self.saveAsList = False + self.mayReturnEmpty = True + return self + + def parseImpl(self, instring, loc, doActions=True): + maxExcLoc = -1 + maxException = None + + for e in self.exprs: + try: + return e._parse( + instring, + loc, + doActions, + ) + except ParseFatalException as pfe: + pfe.__traceback__ = None + pfe.parserElement = e + raise + except ParseException as err: + if err.loc > maxExcLoc: + maxException = err + maxExcLoc = err.loc + except IndexError: + if len(instring) > maxExcLoc: + maxException = ParseException( + instring, len(instring), e.errmsg, self + ) + maxExcLoc = len(instring) + + if maxException is not None: + maxException.msg = self.errmsg + raise maxException + else: + raise ParseException( + instring, loc, "no defined alternatives to match", self + ) + + def __ior__(self, other): + if isinstance(other, str_type): + other = self._literalStringClass(other) + return self.append(other) # MatchFirst([self, other]) + + def _generateDefaultName(self): + return "{" + " | ".join(str(e) for e in self.exprs) + "}" + + def _setResultsName(self, name, listAllMatches=False): + if ( + __diag__.warn_multiple_tokens_in_named_alternation + and Diagnostics.warn_multiple_tokens_in_named_alternation + not in self.suppress_warnings_ + ): + if any( + isinstance(e, And) + and Diagnostics.warn_multiple_tokens_in_named_alternation + not in e.suppress_warnings_ + for e in self.exprs + ): + warnings.warn( + "{}: setting results name {!r} on {} expression " + "will return a list of all parsed tokens in an And alternative, " + "in prior versions only the first token was returned; enclose " + "contained argument in Group".format( + "warn_multiple_tokens_in_named_alternation", + name, + type(self).__name__, + ), + stacklevel=3, + ) + + return super()._setResultsName(name, listAllMatches) + + +class Each(ParseExpression): + """Requires all given :class:`ParseExpression` s to be found, but in + any order. Expressions may be separated by whitespace. + + May be constructed using the ``'&'`` operator. + + Example:: + + color = one_of("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN") + shape_type = one_of("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON") + integer = Word(nums) + shape_attr = "shape:" + shape_type("shape") + posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn") + color_attr = "color:" + color("color") + size_attr = "size:" + integer("size") + + # use Each (using operator '&') to accept attributes in any order + # (shape and posn are required, color and size are optional) + shape_spec = shape_attr & posn_attr & Opt(color_attr) & Opt(size_attr) + + shape_spec.run_tests(''' + shape: SQUARE color: BLACK posn: 100, 120 + shape: CIRCLE size: 50 color: BLUE posn: 50,80 + color:GREEN size:20 shape:TRIANGLE posn:20,40 + ''' + ) + + prints:: + + shape: SQUARE color: BLACK posn: 100, 120 + ['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']] + - color: BLACK + - posn: ['100', ',', '120'] + - x: 100 + - y: 120 + - shape: SQUARE + + + shape: CIRCLE size: 50 color: BLUE posn: 50,80 + ['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']] + - color: BLUE + - posn: ['50', ',', '80'] + - x: 50 + - y: 80 + - shape: CIRCLE + - size: 50 + + + color: GREEN size: 20 shape: TRIANGLE posn: 20,40 + ['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']] + - color: GREEN + - posn: ['20', ',', '40'] + - x: 20 + - y: 40 + - shape: TRIANGLE + - size: 20 + """ + + def __init__(self, exprs: IterableType[ParserElement], savelist: bool = True): + super().__init__(exprs, savelist) + if self.exprs: + self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs) + else: + self.mayReturnEmpty = True + self.skipWhitespace = True + self.initExprGroups = True + self.saveAsList = True + + def streamline(self) -> ParserElement: + super().streamline() + if self.exprs: + self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs) + else: + self.mayReturnEmpty = True + return self + + def parseImpl(self, instring, loc, doActions=True): + if self.initExprGroups: + self.opt1map = dict( + (id(e.expr), e) for e in self.exprs if isinstance(e, Opt) + ) + opt1 = [e.expr for e in self.exprs if isinstance(e, Opt)] + opt2 = [ + e + for e in self.exprs + if e.mayReturnEmpty and not isinstance(e, (Opt, Regex, ZeroOrMore)) + ] + self.optionals = opt1 + opt2 + self.multioptionals = [ + e.expr.set_results_name(e.resultsName, list_all_matches=True) + for e in self.exprs + if isinstance(e, _MultipleMatch) + ] + self.multirequired = [ + e.expr.set_results_name(e.resultsName, list_all_matches=True) + for e in self.exprs + if isinstance(e, OneOrMore) + ] + self.required = [ + e for e in self.exprs if not isinstance(e, (Opt, ZeroOrMore, OneOrMore)) + ] + self.required += self.multirequired + self.initExprGroups = False + + tmpLoc = loc + tmpReqd = self.required[:] + tmpOpt = self.optionals[:] + multis = self.multioptionals[:] + matchOrder = [] + + keepMatching = True + failed = [] + fatals = [] + while keepMatching: + tmpExprs = tmpReqd + tmpOpt + multis + failed.clear() + fatals.clear() + for e in tmpExprs: + try: + tmpLoc = e.try_parse(instring, tmpLoc, raise_fatal=True) + except ParseFatalException as pfe: + pfe.__traceback__ = None + pfe.parserElement = e + fatals.append(pfe) + failed.append(e) + except ParseException: + failed.append(e) + else: + matchOrder.append(self.opt1map.get(id(e), e)) + if e in tmpReqd: + tmpReqd.remove(e) + elif e in tmpOpt: + tmpOpt.remove(e) + if len(failed) == len(tmpExprs): + keepMatching = False + + # look for any ParseFatalExceptions + if fatals: + if len(fatals) > 1: + fatals.sort(key=lambda e: -e.loc) + if fatals[0].loc == fatals[1].loc: + fatals.sort(key=lambda e: (-e.loc, -len(str(e.parserElement)))) + max_fatal = fatals[0] + raise max_fatal + + if tmpReqd: + missing = ", ".join([str(e) for e in tmpReqd]) + raise ParseException( + instring, + loc, + "Missing one or more required elements ({})".format(missing), + ) + + # add any unmatched Opts, in case they have default values defined + matchOrder += [e for e in self.exprs if isinstance(e, Opt) and e.expr in tmpOpt] + + total_results = ParseResults([]) + for e in matchOrder: + loc, results = e._parse(instring, loc, doActions) + total_results += results + + return loc, total_results + + def _generateDefaultName(self): + return "{" + " & ".join(str(e) for e in self.exprs) + "}" + + +class ParseElementEnhance(ParserElement): + """Abstract subclass of :class:`ParserElement`, for combining and + post-processing parsed tokens. + """ + + def __init__(self, expr: Union[ParserElement, str], savelist: bool = False): + super().__init__(savelist) + if isinstance(expr, str_type): + if issubclass(self._literalStringClass, Token): + expr = self._literalStringClass(expr) + elif issubclass(type(self), self._literalStringClass): + expr = Literal(expr) + else: + expr = self._literalStringClass(Literal(expr)) + self.expr = expr + if expr is not None: + self.mayIndexError = expr.mayIndexError + self.mayReturnEmpty = expr.mayReturnEmpty + self.set_whitespace_chars( + expr.whiteChars, copy_defaults=expr.copyDefaultWhiteChars + ) + self.skipWhitespace = expr.skipWhitespace + self.saveAsList = expr.saveAsList + self.callPreparse = expr.callPreparse + self.ignoreExprs.extend(expr.ignoreExprs) + + def recurse(self) -> Sequence[ParserElement]: + return [self.expr] if self.expr is not None else [] + + def parseImpl(self, instring, loc, doActions=True): + if self.expr is not None: + return self.expr._parse(instring, loc, doActions, callPreParse=False) + else: + raise ParseException(instring, loc, "No expression defined", self) + + def leave_whitespace(self, recursive: bool = True) -> ParserElement: + super().leave_whitespace(recursive) + + if recursive: + self.expr = self.expr.copy() + if self.expr is not None: + self.expr.leave_whitespace(recursive) + return self + + def ignore_whitespace(self, recursive: bool = True) -> ParserElement: + super().ignore_whitespace(recursive) + + if recursive: + self.expr = self.expr.copy() + if self.expr is not None: + self.expr.ignore_whitespace(recursive) + return self + + def ignore(self, other) -> ParserElement: + if isinstance(other, Suppress): + if other not in self.ignoreExprs: + super().ignore(other) + if self.expr is not None: + self.expr.ignore(self.ignoreExprs[-1]) + else: + super().ignore(other) + if self.expr is not None: + self.expr.ignore(self.ignoreExprs[-1]) + return self + + def streamline(self) -> ParserElement: + super().streamline() + if self.expr is not None: + self.expr.streamline() + return self + + def _checkRecursion(self, parseElementList): + if self in parseElementList: + raise RecursiveGrammarException(parseElementList + [self]) + subRecCheckList = parseElementList[:] + [self] + if self.expr is not None: + self.expr._checkRecursion(subRecCheckList) + + def validate(self, validateTrace=None) -> None: + if validateTrace is None: + validateTrace = [] + tmp = validateTrace[:] + [self] + if self.expr is not None: + self.expr.validate(tmp) + self._checkRecursion([]) + + def _generateDefaultName(self): + return "{}:({})".format(self.__class__.__name__, str(self.expr)) + + ignoreWhitespace = ignore_whitespace + leaveWhitespace = leave_whitespace + + +class IndentedBlock(ParseElementEnhance): + """ + Expression to match one or more expressions at a given indentation level. + Useful for parsing text where structure is implied by indentation (like Python source code). + """ + + class _Indent(Empty): + def __init__(self, ref_col: int): + super().__init__() + self.errmsg = "expected indent at column {}".format(ref_col) + self.add_condition(lambda s, l, t: col(l, s) == ref_col) + + class _IndentGreater(Empty): + def __init__(self, ref_col: int): + super().__init__() + self.errmsg = "expected indent at column greater than {}".format(ref_col) + self.add_condition(lambda s, l, t: col(l, s) > ref_col) + + def __init__( + self, expr: ParserElement, *, recursive: bool = False, grouped: bool = True + ): + super().__init__(expr, savelist=True) + # if recursive: + # raise NotImplementedError("IndentedBlock with recursive is not implemented") + self._recursive = recursive + self._grouped = grouped + self.parent_anchor = 1 + + def parseImpl(self, instring, loc, doActions=True): + # advance parse position to non-whitespace by using an Empty() + # this should be the column to be used for all subsequent indented lines + anchor_loc = Empty().preParse(instring, loc) + + # see if self.expr matches at the current location - if not it will raise an exception + # and no further work is necessary + self.expr.try_parse(instring, anchor_loc, doActions) + + indent_col = col(anchor_loc, instring) + peer_detect_expr = self._Indent(indent_col) + + inner_expr = Empty() + peer_detect_expr + self.expr + if self._recursive: + sub_indent = self._IndentGreater(indent_col) + nested_block = IndentedBlock( + self.expr, recursive=self._recursive, grouped=self._grouped + ) + nested_block.set_debug(self.debug) + nested_block.parent_anchor = indent_col + inner_expr += Opt(sub_indent + nested_block) + + inner_expr.set_name(f"inner {hex(id(inner_expr))[-4:].upper()}@{indent_col}") + block = OneOrMore(inner_expr) + + trailing_undent = self._Indent(self.parent_anchor) | StringEnd() + + if self._grouped: + wrapper = Group + else: + wrapper = lambda expr: expr + return (wrapper(block) + Optional(trailing_undent)).parseImpl( + instring, anchor_loc, doActions + ) + + +class AtStringStart(ParseElementEnhance): + """Matches if expression matches at the beginning of the parse + string:: + + AtStringStart(Word(nums)).parse_string("123") + # prints ["123"] + + AtStringStart(Word(nums)).parse_string(" 123") + # raises ParseException + """ + + def __init__(self, expr: Union[ParserElement, str]): + super().__init__(expr) + self.callPreparse = False + + def parseImpl(self, instring, loc, doActions=True): + if loc != 0: + raise ParseException(instring, loc, "not found at string start") + return super().parseImpl(instring, loc, doActions) + + +class AtLineStart(ParseElementEnhance): + r"""Matches if an expression matches at the beginning of a line within + the parse string + + Example:: + + test = '''\ + AAA this line + AAA and this line + AAA but not this one + B AAA and definitely not this one + ''' + + for t in (AtLineStart('AAA') + restOfLine).search_string(test): + print(t) + + prints:: + + ['AAA', ' this line'] + ['AAA', ' and this line'] + + """ + + def __init__(self, expr: Union[ParserElement, str]): + super().__init__(expr) + self.callPreparse = False + + def parseImpl(self, instring, loc, doActions=True): + if col(loc, instring) != 1: + raise ParseException(instring, loc, "not found at line start") + return super().parseImpl(instring, loc, doActions) + + +class FollowedBy(ParseElementEnhance): + """Lookahead matching of the given parse expression. + ``FollowedBy`` does *not* advance the parsing position within + the input string, it only verifies that the specified parse + expression matches at the current position. ``FollowedBy`` + always returns a null token list. If any results names are defined + in the lookahead expression, those *will* be returned for access by + name. + + Example:: + + # use FollowedBy to match a label only if it is followed by a ':' + data_word = Word(alphas) + label = data_word + FollowedBy(':') + attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stop_on=label).set_parse_action(' '.join)) + + OneOrMore(attr_expr).parse_string("shape: SQUARE color: BLACK posn: upper left").pprint() + + prints:: + + [['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']] + """ + + def __init__(self, expr: Union[ParserElement, str]): + super().__init__(expr) + self.mayReturnEmpty = True + + def parseImpl(self, instring, loc, doActions=True): + # by using self._expr.parse and deleting the contents of the returned ParseResults list + # we keep any named results that were defined in the FollowedBy expression + _, ret = self.expr._parse(instring, loc, doActions=doActions) + del ret[:] + + return loc, ret + + +class PrecededBy(ParseElementEnhance): + """Lookbehind matching of the given parse expression. + ``PrecededBy`` does not advance the parsing position within the + input string, it only verifies that the specified parse expression + matches prior to the current position. ``PrecededBy`` always + returns a null token list, but if a results name is defined on the + given expression, it is returned. + + Parameters: + + - expr - expression that must match prior to the current parse + location + - retreat - (default= ``None``) - (int) maximum number of characters + to lookbehind prior to the current parse location + + If the lookbehind expression is a string, :class:`Literal`, + :class:`Keyword`, or a :class:`Word` or :class:`CharsNotIn` + with a specified exact or maximum length, then the retreat + parameter is not required. Otherwise, retreat must be specified to + give a maximum number of characters to look back from + the current parse position for a lookbehind match. + + Example:: + + # VB-style variable names with type prefixes + int_var = PrecededBy("#") + pyparsing_common.identifier + str_var = PrecededBy("$") + pyparsing_common.identifier + + """ + + def __init__( + self, expr: Union[ParserElement, str], retreat: OptionalType[int] = None + ): + super().__init__(expr) + self.expr = self.expr().leave_whitespace() + self.mayReturnEmpty = True + self.mayIndexError = False + self.exact = False + if isinstance(expr, str_type): + retreat = len(expr) + self.exact = True + elif isinstance(expr, (Literal, Keyword)): + retreat = expr.matchLen + self.exact = True + elif isinstance(expr, (Word, CharsNotIn)) and expr.maxLen != _MAX_INT: + retreat = expr.maxLen + self.exact = True + elif isinstance(expr, PositionToken): + retreat = 0 + self.exact = True + self.retreat = retreat + self.errmsg = "not preceded by " + str(expr) + self.skipWhitespace = False + self.parseAction.append(lambda s, l, t: t.__delitem__(slice(None, None))) + + def parseImpl(self, instring, loc=0, doActions=True): + if self.exact: + if loc < self.retreat: + raise ParseException(instring, loc, self.errmsg) + start = loc - self.retreat + _, ret = self.expr._parse(instring, start) + else: + # retreat specified a maximum lookbehind window, iterate + test_expr = self.expr + StringEnd() + instring_slice = instring[max(0, loc - self.retreat) : loc] + last_expr = ParseException(instring, loc, self.errmsg) + for offset in range(1, min(loc, self.retreat + 1) + 1): + try: + # print('trying', offset, instring_slice, repr(instring_slice[loc - offset:])) + _, ret = test_expr._parse( + instring_slice, len(instring_slice) - offset + ) + except ParseBaseException as pbe: + last_expr = pbe + else: + break + else: + raise last_expr + return loc, ret + + +class Located(ParseElementEnhance): + """ + Decorates a returned token with its starting and ending + locations in the input string. + + This helper adds the following results names: + + - ``locn_start`` - location where matched expression begins + - ``locn_end`` - location where matched expression ends + - ``value`` - the actual parsed results + + Be careful if the input text contains ```` characters, you + may want to call :class:`ParserElement.parse_with_tabs` + + Example:: + + wd = Word(alphas) + for match in Located(wd).search_string("ljsdf123lksdjjf123lkkjj1222"): + print(match) + + prints:: + + [0, ['ljsdf'], 5] + [8, ['lksdjjf'], 15] + [18, ['lkkjj'], 23] + + """ + + def parseImpl(self, instring, loc, doActions=True): + start = loc + loc, tokens = self.expr._parse(instring, start, doActions, callPreParse=False) + ret_tokens = ParseResults([start, tokens, loc]) + ret_tokens["locn_start"] = start + ret_tokens["value"] = tokens + ret_tokens["locn_end"] = loc + if self.resultsName: + # must return as a list, so that the name will be attached to the complete group + return loc, [ret_tokens] + else: + return loc, ret_tokens + + +class NotAny(ParseElementEnhance): + """ + Lookahead to disallow matching with the given parse expression. + ``NotAny`` does *not* advance the parsing position within the + input string, it only verifies that the specified parse expression + does *not* match at the current position. Also, ``NotAny`` does + *not* skip over leading whitespace. ``NotAny`` always returns + a null token list. May be constructed using the ``'~'`` operator. + + Example:: + + AND, OR, NOT = map(CaselessKeyword, "AND OR NOT".split()) + + # take care not to mistake keywords for identifiers + ident = ~(AND | OR | NOT) + Word(alphas) + boolean_term = Opt(NOT) + ident + + # very crude boolean expression - to support parenthesis groups and + # operation hierarchy, use infix_notation + boolean_expr = boolean_term + ZeroOrMore((AND | OR) + boolean_term) + + # integers that are followed by "." are actually floats + integer = Word(nums) + ~Char(".") + """ + + def __init__(self, expr: Union[ParserElement, str]): + super().__init__(expr) + # do NOT use self.leave_whitespace(), don't want to propagate to exprs + # self.leave_whitespace() + self.skipWhitespace = False + + self.mayReturnEmpty = True + self.errmsg = "Found unwanted token, " + str(self.expr) + + def parseImpl(self, instring, loc, doActions=True): + if self.expr.can_parse_next(instring, loc): + raise ParseException(instring, loc, self.errmsg, self) + return loc, [] + + def _generateDefaultName(self): + return "~{" + str(self.expr) + "}" + + +class _MultipleMatch(ParseElementEnhance): + def __init__( + self, + expr: ParserElement, + stop_on: OptionalType[Union[ParserElement, str]] = None, + *, + stopOn: OptionalType[Union[ParserElement, str]] = None, + ): + super().__init__(expr) + stopOn = stopOn or stop_on + self.saveAsList = True + ender = stopOn + if isinstance(ender, str_type): + ender = self._literalStringClass(ender) + self.stopOn(ender) + + def stopOn(self, ender) -> ParserElement: + if isinstance(ender, str_type): + ender = self._literalStringClass(ender) + self.not_ender = ~ender if ender is not None else None + return self + + def parseImpl(self, instring, loc, doActions=True): + self_expr_parse = self.expr._parse + self_skip_ignorables = self._skipIgnorables + check_ender = self.not_ender is not None + if check_ender: + try_not_ender = self.not_ender.tryParse + + # must be at least one (but first see if we are the stopOn sentinel; + # if so, fail) + if check_ender: + try_not_ender(instring, loc) + loc, tokens = self_expr_parse(instring, loc, doActions) + try: + hasIgnoreExprs = not not self.ignoreExprs + while 1: + if check_ender: + try_not_ender(instring, loc) + if hasIgnoreExprs: + preloc = self_skip_ignorables(instring, loc) + else: + preloc = loc + loc, tmptokens = self_expr_parse(instring, preloc, doActions) + if tmptokens or tmptokens.haskeys(): + tokens += tmptokens + except (ParseException, IndexError): + pass + + return loc, tokens + + def _setResultsName(self, name, listAllMatches=False): + if ( + __diag__.warn_ungrouped_named_tokens_in_collection + and Diagnostics.warn_ungrouped_named_tokens_in_collection + not in self.suppress_warnings_ + ): + for e in [self.expr] + self.expr.recurse(): + if ( + isinstance(e, ParserElement) + and e.resultsName + and Diagnostics.warn_ungrouped_named_tokens_in_collection + not in e.suppress_warnings_ + ): + warnings.warn( + "{}: setting results name {!r} on {} expression " + "collides with {!r} on contained expression".format( + "warn_ungrouped_named_tokens_in_collection", + name, + type(self).__name__, + e.resultsName, + ), + stacklevel=3, + ) + + return super()._setResultsName(name, listAllMatches) + + +class OneOrMore(_MultipleMatch): + """ + Repetition of one or more of the given expression. + + Parameters: + - expr - expression that must match one or more times + - stop_on - (default= ``None``) - expression for a terminating sentinel + (only required if the sentinel would ordinarily match the repetition + expression) + + Example:: + + data_word = Word(alphas) + label = data_word + FollowedBy(':') + attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).set_parse_action(' '.join)) + + text = "shape: SQUARE posn: upper left color: BLACK" + OneOrMore(attr_expr).parse_string(text).pprint() # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']] + + # use stop_on attribute for OneOrMore to avoid reading label string as part of the data + attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stop_on=label).set_parse_action(' '.join)) + OneOrMore(attr_expr).parse_string(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']] + + # could also be written as + (attr_expr * (1,)).parse_string(text).pprint() + """ + + def _generateDefaultName(self): + return "{" + str(self.expr) + "}..." + + +class ZeroOrMore(_MultipleMatch): + """ + Optional repetition of zero or more of the given expression. + + Parameters: + - ``expr`` - expression that must match zero or more times + - ``stop_on`` - expression for a terminating sentinel + (only required if the sentinel would ordinarily match the repetition + expression) - (default= ``None``) + + Example: similar to :class:`OneOrMore` + """ + + def __init__( + self, + expr: ParserElement, + stop_on: OptionalType[Union[ParserElement, str]] = None, + *, + stopOn: OptionalType[Union[ParserElement, str]] = None, + ): + super().__init__(expr, stopOn=stopOn or stop_on) + self.mayReturnEmpty = True + + def parseImpl(self, instring, loc, doActions=True): + try: + return super().parseImpl(instring, loc, doActions) + except (ParseException, IndexError): + return loc, ParseResults([], name=self.resultsName) + + def _generateDefaultName(self): + return "[" + str(self.expr) + "]..." + + +class _NullToken: + def __bool__(self): + return False + + def __str__(self): + return "" + + +class Opt(ParseElementEnhance): + """ + Optional matching of the given expression. + + Parameters: + - ``expr`` - expression that must match zero or more times + - ``default`` (optional) - value to be returned if the optional expression is not found. + + Example:: + + # US postal code can be a 5-digit zip, plus optional 4-digit qualifier + zip = Combine(Word(nums, exact=5) + Opt('-' + Word(nums, exact=4))) + zip.run_tests(''' + # traditional ZIP code + 12345 + + # ZIP+4 form + 12101-0001 + + # invalid ZIP + 98765- + ''') + + prints:: + + # traditional ZIP code + 12345 + ['12345'] + + # ZIP+4 form + 12101-0001 + ['12101-0001'] + + # invalid ZIP + 98765- + ^ + FAIL: Expected end of text (at char 5), (line:1, col:6) + """ + + __optionalNotMatched = _NullToken() + + def __init__( + self, expr: Union[ParserElement, str], default: Any = __optionalNotMatched + ): + super().__init__(expr, savelist=False) + self.saveAsList = self.expr.saveAsList + self.defaultValue = default + self.mayReturnEmpty = True + + def parseImpl(self, instring, loc, doActions=True): + self_expr = self.expr + try: + loc, tokens = self_expr._parse(instring, loc, doActions, callPreParse=False) + except (ParseException, IndexError): + default_value = self.defaultValue + if default_value is not self.__optionalNotMatched: + if self_expr.resultsName: + tokens = ParseResults([default_value]) + tokens[self_expr.resultsName] = default_value + else: + tokens = [default_value] + else: + tokens = [] + return loc, tokens + + def _generateDefaultName(self): + inner = str(self.expr) + # strip off redundant inner {}'s + while len(inner) > 1 and inner[0 :: len(inner) - 1] == "{}": + inner = inner[1:-1] + return "[" + inner + "]" + + +Optional = Opt + + +class SkipTo(ParseElementEnhance): + """ + Token for skipping over all undefined text until the matched + expression is found. + + Parameters: + - ``expr`` - target expression marking the end of the data to be skipped + - ``include`` - if ``True``, the target expression is also parsed + (the skipped text and target expression are returned as a 2-element + list) (default= ``False``). + - ``ignore`` - (default= ``None``) used to define grammars (typically quoted strings and + comments) that might contain false matches to the target expression + - ``fail_on`` - (default= ``None``) define expressions that are not allowed to be + included in the skipped test; if found before the target expression is found, + the :class:`SkipTo` is not a match + + Example:: + + report = ''' + Outstanding Issues Report - 1 Jan 2000 + + # | Severity | Description | Days Open + -----+----------+-------------------------------------------+----------- + 101 | Critical | Intermittent system crash | 6 + 94 | Cosmetic | Spelling error on Login ('log|n') | 14 + 79 | Minor | System slow when running too many reports | 47 + ''' + integer = Word(nums) + SEP = Suppress('|') + # use SkipTo to simply match everything up until the next SEP + # - ignore quoted strings, so that a '|' character inside a quoted string does not match + # - parse action will call token.strip() for each matched token, i.e., the description body + string_data = SkipTo(SEP, ignore=quoted_string) + string_data.set_parse_action(token_map(str.strip)) + ticket_expr = (integer("issue_num") + SEP + + string_data("sev") + SEP + + string_data("desc") + SEP + + integer("days_open")) + + for tkt in ticket_expr.search_string(report): + print tkt.dump() + + prints:: + + ['101', 'Critical', 'Intermittent system crash', '6'] + - days_open: '6' + - desc: 'Intermittent system crash' + - issue_num: '101' + - sev: 'Critical' + ['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14'] + - days_open: '14' + - desc: "Spelling error on Login ('log|n')" + - issue_num: '94' + - sev: 'Cosmetic' + ['79', 'Minor', 'System slow when running too many reports', '47'] + - days_open: '47' + - desc: 'System slow when running too many reports' + - issue_num: '79' + - sev: 'Minor' + """ + + def __init__( + self, + other: Union[ParserElement, str], + include: bool = False, + ignore: bool = None, + fail_on: OptionalType[Union[ParserElement, str]] = None, + *, + failOn: Union[ParserElement, str] = None, + ): + super().__init__(other) + failOn = failOn or fail_on + self.ignoreExpr = ignore + self.mayReturnEmpty = True + self.mayIndexError = False + self.includeMatch = include + self.saveAsList = False + if isinstance(failOn, str_type): + self.failOn = self._literalStringClass(failOn) + else: + self.failOn = failOn + self.errmsg = "No match found for " + str(self.expr) + + def parseImpl(self, instring, loc, doActions=True): + startloc = loc + instrlen = len(instring) + self_expr_parse = self.expr._parse + self_failOn_canParseNext = ( + self.failOn.canParseNext if self.failOn is not None else None + ) + self_ignoreExpr_tryParse = ( + self.ignoreExpr.tryParse if self.ignoreExpr is not None else None + ) + + tmploc = loc + while tmploc <= instrlen: + if self_failOn_canParseNext is not None: + # break if failOn expression matches + if self_failOn_canParseNext(instring, tmploc): + break + + if self_ignoreExpr_tryParse is not None: + # advance past ignore expressions + while 1: + try: + tmploc = self_ignoreExpr_tryParse(instring, tmploc) + except ParseBaseException: + break + + try: + self_expr_parse(instring, tmploc, doActions=False, callPreParse=False) + except (ParseException, IndexError): + # no match, advance loc in string + tmploc += 1 + else: + # matched skipto expr, done + break + + else: + # ran off the end of the input string without matching skipto expr, fail + raise ParseException(instring, loc, self.errmsg, self) + + # build up return values + loc = tmploc + skiptext = instring[startloc:loc] + skipresult = ParseResults(skiptext) + + if self.includeMatch: + loc, mat = self_expr_parse(instring, loc, doActions, callPreParse=False) + skipresult += mat + + return loc, skipresult + + +class Forward(ParseElementEnhance): + """ + Forward declaration of an expression to be defined later - + used for recursive grammars, such as algebraic infix notation. + When the expression is known, it is assigned to the ``Forward`` + variable using the ``'<<'`` operator. + + Note: take care when assigning to ``Forward`` not to overlook + precedence of operators. + + Specifically, ``'|'`` has a lower precedence than ``'<<'``, so that:: + + fwd_expr << a | b | c + + will actually be evaluated as:: + + (fwd_expr << a) | b | c + + thereby leaving b and c out as parseable alternatives. It is recommended that you + explicitly group the values inserted into the ``Forward``:: + + fwd_expr << (a | b | c) + + Converting to use the ``'<<='`` operator instead will avoid this problem. + + See :class:`ParseResults.pprint` for an example of a recursive + parser created using ``Forward``. + """ + + def __init__(self, other: OptionalType[Union[ParserElement, str]] = None): + self.caller_frame = traceback.extract_stack(limit=2)[0] + super().__init__(other, savelist=False) + self.lshift_line = None + + def __lshift__(self, other): + if hasattr(self, "caller_frame"): + del self.caller_frame + if isinstance(other, str_type): + other = self._literalStringClass(other) + self.expr = other + self.mayIndexError = self.expr.mayIndexError + self.mayReturnEmpty = self.expr.mayReturnEmpty + self.set_whitespace_chars( + self.expr.whiteChars, copy_defaults=self.expr.copyDefaultWhiteChars + ) + self.skipWhitespace = self.expr.skipWhitespace + self.saveAsList = self.expr.saveAsList + self.ignoreExprs.extend(self.expr.ignoreExprs) + self.lshift_line = traceback.extract_stack(limit=2)[-2] + return self + + def __ilshift__(self, other): + return self << other + + def __or__(self, other): + caller_line = traceback.extract_stack(limit=2)[-2] + if ( + __diag__.warn_on_match_first_with_lshift_operator + and caller_line == self.lshift_line + and Diagnostics.warn_on_match_first_with_lshift_operator + not in self.suppress_warnings_ + ): + warnings.warn( + "using '<<' operator with '|' is probably an error, use '<<='", + stacklevel=2, + ) + ret = super().__or__(other) + return ret + + def __del__(self): + # see if we are getting dropped because of '=' reassignment of var instead of '<<=' or '<<' + if ( + self.expr is None + and __diag__.warn_on_assignment_to_Forward + and Diagnostics.warn_on_assignment_to_Forward not in self.suppress_warnings_ + ): + warnings.warn_explicit( + "Forward defined here but no expression attached later using '<<=' or '<<'", + UserWarning, + filename=self.caller_frame.filename, + lineno=self.caller_frame.lineno, + ) + + def parseImpl(self, instring, loc, doActions=True): + if ( + self.expr is None + and __diag__.warn_on_parse_using_empty_Forward + and Diagnostics.warn_on_parse_using_empty_Forward + not in self.suppress_warnings_ + ): + # walk stack until parse_string, scan_string, search_string, or transform_string is found + parse_fns = [ + "parse_string", + "scan_string", + "search_string", + "transform_string", + ] + tb = traceback.extract_stack(limit=200) + for i, frm in enumerate(reversed(tb), start=1): + if frm.name in parse_fns: + stacklevel = i + 1 + break + else: + stacklevel = 2 + warnings.warn( + "Forward expression was never assigned a value, will not parse any input", + stacklevel=stacklevel, + ) + if not ParserElement._left_recursion_enabled: + return super().parseImpl(instring, loc, doActions) + # ## Bounded Recursion algorithm ## + # Recursion only needs to be processed at ``Forward`` elements, since they are + # the only ones that can actually refer to themselves. The general idea is + # to handle recursion stepwise: We start at no recursion, then recurse once, + # recurse twice, ..., until more recursion offers no benefit (we hit the bound). + # + # The "trick" here is that each ``Forward`` gets evaluated in two contexts + # - to *match* a specific recursion level, and + # - to *search* the bounded recursion level + # and the two run concurrently. The *search* must *match* each recursion level + # to find the best possible match. This is handled by a memo table, which + # provides the previous match to the next level match attempt. + # + # See also "Left Recursion in Parsing Expression Grammars", Medeiros et al. + # + # There is a complication since we not only *parse* but also *transform* via + # actions: We do not want to run the actions too often while expanding. Thus, + # we expand using `doActions=False` and only run `doActions=True` if the next + # recursion level is acceptable. + with ParserElement.recursion_lock: + memo = ParserElement.recursion_memos + try: + # we are parsing at a specific recursion expansion - use it as-is + prev_loc, prev_result = memo[loc, self, doActions] + if isinstance(prev_result, Exception): + raise prev_result + return prev_loc, prev_result.copy() + except KeyError: + act_key = (loc, self, True) + peek_key = (loc, self, False) + # we are searching for the best recursion expansion - keep on improving + # both `doActions` cases must be tracked separately here! + prev_loc, prev_peek = memo[peek_key] = ( + loc - 1, + ParseException( + instring, loc, "Forward recursion without base case", self + ), + ) + if doActions: + memo[act_key] = memo[peek_key] + while True: + try: + new_loc, new_peek = super().parseImpl(instring, loc, False) + except ParseException: + # we failed before getting any match – do not hide the error + if isinstance(prev_peek, Exception): + raise + new_loc, new_peek = prev_loc, prev_peek + # the match did not get better: we are done + if new_loc <= prev_loc: + if doActions: + # replace the match for doActions=False as well, + # in case the action did backtrack + prev_loc, prev_result = memo[peek_key] = memo[act_key] + del memo[peek_key], memo[act_key] + return prev_loc, prev_result.copy() + del memo[peek_key] + return prev_loc, prev_peek.copy() + # the match did get better: see if we can improve further + else: + if doActions: + try: + memo[act_key] = super().parseImpl(instring, loc, True) + except ParseException as e: + memo[peek_key] = memo[act_key] = (new_loc, e) + raise + prev_loc, prev_peek = memo[peek_key] = new_loc, new_peek + + def leave_whitespace(self, recursive: bool = True) -> ParserElement: + self.skipWhitespace = False + return self + + def ignore_whitespace(self, recursive: bool = True) -> ParserElement: + self.skipWhitespace = True + return self + + def streamline(self) -> ParserElement: + if not self.streamlined: + self.streamlined = True + if self.expr is not None: + self.expr.streamline() + return self + + def validate(self, validateTrace=None) -> None: + if validateTrace is None: + validateTrace = [] + + if self not in validateTrace: + tmp = validateTrace[:] + [self] + if self.expr is not None: + self.expr.validate(tmp) + self._checkRecursion([]) + + def _generateDefaultName(self): + # Avoid infinite recursion by setting a temporary _defaultName + self._defaultName = ": ..." + + # Use the string representation of main expression. + retString = "..." + try: + if self.expr is not None: + retString = str(self.expr)[:1000] + else: + retString = "None" + finally: + return self.__class__.__name__ + ": " + retString + + def copy(self) -> ParserElement: + if self.expr is not None: + return super().copy() + else: + ret = Forward() + ret <<= self + return ret + + def _setResultsName(self, name, list_all_matches=False): + if ( + __diag__.warn_name_set_on_empty_Forward + and Diagnostics.warn_name_set_on_empty_Forward + not in self.suppress_warnings_ + ): + if self.expr is None: + warnings.warn( + "{}: setting results name {!r} on {} expression " + "that has no contained expression".format( + "warn_name_set_on_empty_Forward", name, type(self).__name__ + ), + stacklevel=3, + ) + + return super()._setResultsName(name, list_all_matches) + + ignoreWhitespace = ignore_whitespace + leaveWhitespace = leave_whitespace + + +class TokenConverter(ParseElementEnhance): + """ + Abstract subclass of :class:`ParseExpression`, for converting parsed results. + """ + + def __init__(self, expr: Union[ParserElement, str], savelist=False): + super().__init__(expr) # , savelist) + self.saveAsList = False + + +class Combine(TokenConverter): + """Converter to concatenate all matching tokens to a single string. + By default, the matching patterns must also be contiguous in the + input string; this can be disabled by specifying + ``'adjacent=False'`` in the constructor. + + Example:: + + real = Word(nums) + '.' + Word(nums) + print(real.parse_string('3.1416')) # -> ['3', '.', '1416'] + # will also erroneously match the following + print(real.parse_string('3. 1416')) # -> ['3', '.', '1416'] + + real = Combine(Word(nums) + '.' + Word(nums)) + print(real.parse_string('3.1416')) # -> ['3.1416'] + # no match when there are internal spaces + print(real.parse_string('3. 1416')) # -> Exception: Expected W:(0123...) + """ + + def __init__( + self, + expr: ParserElement, + join_string: str = "", + adjacent: bool = True, + *, + joinString: OptionalType[str] = None, + ): + super().__init__(expr) + joinString = joinString if joinString is not None else join_string + # suppress whitespace-stripping in contained parse expressions, but re-enable it on the Combine itself + if adjacent: + self.leave_whitespace() + self.adjacent = adjacent + self.skipWhitespace = True + self.joinString = joinString + self.callPreparse = True + + def ignore(self, other) -> ParserElement: + if self.adjacent: + ParserElement.ignore(self, other) + else: + super().ignore(other) + return self + + def postParse(self, instring, loc, tokenlist): + retToks = tokenlist.copy() + del retToks[:] + retToks += ParseResults( + ["".join(tokenlist._asStringList(self.joinString))], modal=self.modalResults + ) + + if self.resultsName and retToks.haskeys(): + return [retToks] + else: + return retToks + + +class Group(TokenConverter): + """Converter to return the matched tokens as a list - useful for + returning tokens of :class:`ZeroOrMore` and :class:`OneOrMore` expressions. + + The optional ``aslist`` argument when set to True will return the + parsed tokens as a Python list instead of a pyparsing ParseResults. + + Example:: + + ident = Word(alphas) + num = Word(nums) + term = ident | num + func = ident + Opt(delimited_list(term)) + print(func.parse_string("fn a, b, 100")) + # -> ['fn', 'a', 'b', '100'] + + func = ident + Group(Opt(delimited_list(term))) + print(func.parse_string("fn a, b, 100")) + # -> ['fn', ['a', 'b', '100']] + """ + + def __init__(self, expr: ParserElement, aslist: bool = False): + super().__init__(expr) + self.saveAsList = True + self._asPythonList = aslist + + def postParse(self, instring, loc, tokenlist): + if self._asPythonList: + return ParseResults.List( + tokenlist.asList() + if isinstance(tokenlist, ParseResults) + else list(tokenlist) + ) + else: + return [tokenlist] + + +class Dict(TokenConverter): + """Converter to return a repetitive expression as a list, but also + as a dictionary. Each element can also be referenced using the first + token in the expression as its key. Useful for tabular report + scraping when the first column can be used as a item key. + + The optional ``asdict`` argument when set to True will return the + parsed tokens as a Python dict instead of a pyparsing ParseResults. + + Example:: + + data_word = Word(alphas) + label = data_word + FollowedBy(':') + + text = "shape: SQUARE posn: upper left color: light blue texture: burlap" + attr_expr = (label + Suppress(':') + OneOrMore(data_word, stop_on=label).set_parse_action(' '.join)) + + # print attributes as plain groups + print(OneOrMore(attr_expr).parse_string(text).dump()) + + # instead of OneOrMore(expr), parse using Dict(OneOrMore(Group(expr))) - Dict will auto-assign names + result = Dict(OneOrMore(Group(attr_expr))).parse_string(text) + print(result.dump()) + + # access named fields as dict entries, or output as dict + print(result['shape']) + print(result.as_dict()) + + prints:: + + ['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap'] + [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']] + - color: 'light blue' + - posn: 'upper left' + - shape: 'SQUARE' + - texture: 'burlap' + SQUARE + {'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'} + + See more examples at :class:`ParseResults` of accessing fields by results name. + """ + + def __init__(self, expr: ParserElement, asdict: bool = False): + super().__init__(expr) + self.saveAsList = True + self._asPythonDict = asdict + + def postParse(self, instring, loc, tokenlist): + for i, tok in enumerate(tokenlist): + if len(tok) == 0: + continue + + ikey = tok[0] + if isinstance(ikey, int): + ikey = str(ikey).strip() + + if len(tok) == 1: + tokenlist[ikey] = _ParseResultsWithOffset("", i) + + elif len(tok) == 2 and not isinstance(tok[1], ParseResults): + tokenlist[ikey] = _ParseResultsWithOffset(tok[1], i) + + else: + try: + dictvalue = tok.copy() # ParseResults(i) + except Exception: + exc = TypeError( + "could not extract dict values from parsed results" + " - Dict expression must contain Grouped expressions" + ) + raise exc from None + + del dictvalue[0] + + if len(dictvalue) != 1 or ( + isinstance(dictvalue, ParseResults) and dictvalue.haskeys() + ): + tokenlist[ikey] = _ParseResultsWithOffset(dictvalue, i) + else: + tokenlist[ikey] = _ParseResultsWithOffset(dictvalue[0], i) + + if self._asPythonDict: + return [tokenlist.as_dict()] if self.resultsName else tokenlist.as_dict() + else: + return [tokenlist] if self.resultsName else tokenlist + + +class Suppress(TokenConverter): + """Converter for ignoring the results of a parsed expression. + + Example:: + + source = "a, b, c,d" + wd = Word(alphas) + wd_list1 = wd + ZeroOrMore(',' + wd) + print(wd_list1.parse_string(source)) + + # often, delimiters that are useful during parsing are just in the + # way afterward - use Suppress to keep them out of the parsed output + wd_list2 = wd + ZeroOrMore(Suppress(',') + wd) + print(wd_list2.parse_string(source)) + + # Skipped text (using '...') can be suppressed as well + source = "lead in START relevant text END trailing text" + start_marker = Keyword("START") + end_marker = Keyword("END") + find_body = Suppress(...) + start_marker + ... + end_marker + print(find_body.parse_string(source) + + prints:: + + ['a', ',', 'b', ',', 'c', ',', 'd'] + ['a', 'b', 'c', 'd'] + ['START', 'relevant text ', 'END'] + + (See also :class:`delimited_list`.) + """ + + def __init__(self, expr: Union[ParserElement, str], savelist: bool = False): + if expr is ...: + expr = _PendingSkip(NoMatch()) + super().__init__(expr) + + def __add__(self, other) -> "ParserElement": + if isinstance(self.expr, _PendingSkip): + return Suppress(SkipTo(other)) + other + else: + return super().__add__(other) + + def __sub__(self, other) -> "ParserElement": + if isinstance(self.expr, _PendingSkip): + return Suppress(SkipTo(other)) - other + else: + return super().__sub__(other) + + def postParse(self, instring, loc, tokenlist): + return [] + + def suppress(self) -> ParserElement: + return self + + +def trace_parse_action(f: ParseAction) -> ParseAction: + """Decorator for debugging parse actions. + + When the parse action is called, this decorator will print + ``">> entering method-name(line:, , )"``. + When the parse action completes, the decorator will print + ``"<<"`` followed by the returned value, or any exception that the parse action raised. + + Example:: + + wd = Word(alphas) + + @trace_parse_action + def remove_duplicate_chars(tokens): + return ''.join(sorted(set(''.join(tokens)))) + + wds = OneOrMore(wd).set_parse_action(remove_duplicate_chars) + print(wds.parse_string("slkdjs sld sldd sdlf sdljf")) + + prints:: + + >>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {})) + < 3: + thisFunc = paArgs[0].__class__.__name__ + "." + thisFunc + sys.stderr.write( + ">>entering {}(line: {!r}, {}, {!r})\n".format(thisFunc, line(l, s), l, t) + ) + try: + ret = f(*paArgs) + except Exception as exc: + sys.stderr.write("< str: + r"""Helper to easily define string ranges for use in :class:`Word` + construction. Borrows syntax from regexp ``'[]'`` string range + definitions:: + + srange("[0-9]") -> "0123456789" + srange("[a-z]") -> "abcdefghijklmnopqrstuvwxyz" + srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_" + + The input string must be enclosed in []'s, and the returned string + is the expanded character set joined into a single string. The + values enclosed in the []'s may be: + + - a single character + - an escaped character with a leading backslash (such as ``\-`` + or ``\]``) + - an escaped hex character with a leading ``'\x'`` + (``\x21``, which is a ``'!'`` character) (``\0x##`` + is also supported for backwards compatibility) + - an escaped octal character with a leading ``'\0'`` + (``\041``, which is a ``'!'`` character) + - a range of any of the above, separated by a dash (``'a-z'``, + etc.) + - any combination of the above (``'aeiouy'``, + ``'a-zA-Z0-9_$'``, etc.) + """ + _expanded = ( + lambda p: p + if not isinstance(p, ParseResults) + else "".join(chr(c) for c in range(ord(p[0]), ord(p[1]) + 1)) + ) + try: + return "".join(_expanded(part) for part in _reBracketExpr.parse_string(s).body) + except Exception: + return "" + + +def token_map(func, *args) -> ParseAction: + """Helper to define a parse action by mapping a function to all + elements of a :class:`ParseResults` list. If any additional args are passed, + they are forwarded to the given function as additional arguments + after the token, as in + ``hex_integer = Word(hexnums).set_parse_action(token_map(int, 16))``, + which will convert the parsed data to an integer using base 16. + + Example (compare the last to example in :class:`ParserElement.transform_string`:: + + hex_ints = OneOrMore(Word(hexnums)).set_parse_action(token_map(int, 16)) + hex_ints.run_tests(''' + 00 11 22 aa FF 0a 0d 1a + ''') + + upperword = Word(alphas).set_parse_action(token_map(str.upper)) + OneOrMore(upperword).run_tests(''' + my kingdom for a horse + ''') + + wd = Word(alphas).set_parse_action(token_map(str.title)) + OneOrMore(wd).set_parse_action(' '.join).run_tests(''' + now is the winter of our discontent made glorious summer by this sun of york + ''') + + prints:: + + 00 11 22 aa FF 0a 0d 1a + [0, 17, 34, 170, 255, 10, 13, 26] + + my kingdom for a horse + ['MY', 'KINGDOM', 'FOR', 'A', 'HORSE'] + + now is the winter of our discontent made glorious summer by this sun of york + ['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York'] + """ + + def pa(s, l, t): + return [func(tokn, *args) for tokn in t] + + func_name = getattr(func, "__name__", getattr(func, "__class__").__name__) + pa.__name__ = func_name + + return pa + + +def autoname_elements() -> None: + """ + Utility to simplify mass-naming of parser elements, for + generating railroad diagram with named subdiagrams. + """ + for name, var in sys._getframe().f_back.f_locals.items(): + if isinstance(var, ParserElement) and not var.customName: + var.set_name(name) + + +dbl_quoted_string = Combine( + Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*') + '"' +).set_name("string enclosed in double quotes") + +sgl_quoted_string = Combine( + Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*") + "'" +).set_name("string enclosed in single quotes") + +quoted_string = Combine( + Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*') + '"' + | Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*") + "'" +).set_name("quotedString using single or double quotes") + +unicode_string = Combine("u" + quoted_string.copy()).set_name("unicode string literal") + + +alphas8bit = srange(r"[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]") +punc8bit = srange(r"[\0xa1-\0xbf\0xd7\0xf7]") + +# build list of built-in expressions, for future reference if a global default value +# gets updated +_builtin_exprs = [v for v in vars().values() if isinstance(v, ParserElement)] + +# backward compatibility names +tokenMap = token_map +conditionAsParseAction = condition_as_parse_action +nullDebugAction = null_debug_action +sglQuotedString = sgl_quoted_string +dblQuotedString = dbl_quoted_string +quotedString = quoted_string +unicodeString = unicode_string +lineStart = line_start +lineEnd = line_end +stringStart = string_start +stringEnd = string_end +traceParseAction = trace_parse_action diff --git a/pkg_resources/_vendor/pyparsing/diagram/__init__.py b/pkg_resources/_vendor/pyparsing/diagram/__init__.py new file mode 100644 index 0000000..2d0c587 --- /dev/null +++ b/pkg_resources/_vendor/pyparsing/diagram/__init__.py @@ -0,0 +1,611 @@ +import railroad +import pyparsing +from pkg_resources import resource_filename +from typing import ( + List, + Optional, + NamedTuple, + Generic, + TypeVar, + Dict, + Callable, + Set, + Iterable, +) +from jinja2 import Template +from io import StringIO +import inspect + + +with open(resource_filename(__name__, "template.jinja2"), encoding="utf-8") as fp: + template = Template(fp.read()) + +# Note: ideally this would be a dataclass, but we're supporting Python 3.5+ so we can't do this yet +NamedDiagram = NamedTuple( + "NamedDiagram", + [("name", str), ("diagram", Optional[railroad.DiagramItem]), ("index", int)], +) +""" +A simple structure for associating a name with a railroad diagram +""" + +T = TypeVar("T") + + +class EachItem(railroad.Group): + """ + Custom railroad item to compose a: + - Group containing a + - OneOrMore containing a + - Choice of the elements in the Each + with the group label indicating that all must be matched + """ + + all_label = "[ALL]" + + def __init__(self, *items): + choice_item = railroad.Choice(len(items) - 1, *items) + one_or_more_item = railroad.OneOrMore(item=choice_item) + super().__init__(one_or_more_item, label=self.all_label) + + +class AnnotatedItem(railroad.Group): + """ + Simple subclass of Group that creates an annotation label + """ + + def __init__(self, label: str, item): + super().__init__(item=item, label="[{}]".format(label) if label else label) + + +class EditablePartial(Generic[T]): + """ + Acts like a functools.partial, but can be edited. In other words, it represents a type that hasn't yet been + constructed. + """ + + # We need this here because the railroad constructors actually transform the data, so can't be called until the + # entire tree is assembled + + def __init__(self, func: Callable[..., T], args: list, kwargs: dict): + self.func = func + self.args = args + self.kwargs = kwargs + + @classmethod + def from_call(cls, func: Callable[..., T], *args, **kwargs) -> "EditablePartial[T]": + """ + If you call this function in the same way that you would call the constructor, it will store the arguments + as you expect. For example EditablePartial.from_call(Fraction, 1, 3)() == Fraction(1, 3) + """ + return EditablePartial(func=func, args=list(args), kwargs=kwargs) + + @property + def name(self): + return self.kwargs["name"] + + def __call__(self) -> T: + """ + Evaluate the partial and return the result + """ + args = self.args.copy() + kwargs = self.kwargs.copy() + + # This is a helpful hack to allow you to specify varargs parameters (e.g. *args) as keyword args (e.g. + # args=['list', 'of', 'things']) + arg_spec = inspect.getfullargspec(self.func) + if arg_spec.varargs in self.kwargs: + args += kwargs.pop(arg_spec.varargs) + + return self.func(*args, **kwargs) + + +def railroad_to_html(diagrams: List[NamedDiagram], **kwargs) -> str: + """ + Given a list of NamedDiagram, produce a single HTML string that visualises those diagrams + :params kwargs: kwargs to be passed in to the template + """ + data = [] + for diagram in diagrams: + io = StringIO() + diagram.diagram.writeSvg(io.write) + title = diagram.name + if diagram.index == 0: + title += " (root)" + data.append({"title": title, "text": "", "svg": io.getvalue()}) + + return template.render(diagrams=data, **kwargs) + + +def resolve_partial(partial: "EditablePartial[T]") -> T: + """ + Recursively resolves a collection of Partials into whatever type they are + """ + if isinstance(partial, EditablePartial): + partial.args = resolve_partial(partial.args) + partial.kwargs = resolve_partial(partial.kwargs) + return partial() + elif isinstance(partial, list): + return [resolve_partial(x) for x in partial] + elif isinstance(partial, dict): + return {key: resolve_partial(x) for key, x in partial.items()} + else: + return partial + + +def to_railroad( + element: pyparsing.ParserElement, + diagram_kwargs: Optional[dict] = None, + vertical: int = 3, + show_results_names: bool = False, + show_groups: bool = False, +) -> List[NamedDiagram]: + """ + Convert a pyparsing element tree into a list of diagrams. This is the recommended entrypoint to diagram + creation if you want to access the Railroad tree before it is converted to HTML + :param element: base element of the parser being diagrammed + :param diagram_kwargs: kwargs to pass to the Diagram() constructor + :param vertical: (optional) - int - limit at which number of alternatives should be + shown vertically instead of horizontally + :param show_results_names - bool to indicate whether results name annotations should be + included in the diagram + :param show_groups - bool to indicate whether groups should be highlighted with an unlabeled + surrounding box + """ + # Convert the whole tree underneath the root + lookup = ConverterState(diagram_kwargs=diagram_kwargs or {}) + _to_diagram_element( + element, + lookup=lookup, + parent=None, + vertical=vertical, + show_results_names=show_results_names, + show_groups=show_groups, + ) + + root_id = id(element) + # Convert the root if it hasn't been already + if root_id in lookup: + if not element.customName: + lookup[root_id].name = "" + lookup[root_id].mark_for_extraction(root_id, lookup, force=True) + + # Now that we're finished, we can convert from intermediate structures into Railroad elements + diags = list(lookup.diagrams.values()) + if len(diags) > 1: + # collapse out duplicate diags with the same name + seen = set() + deduped_diags = [] + for d in diags: + # don't extract SkipTo elements, they are uninformative as subdiagrams + if d.name == "...": + continue + if d.name is not None and d.name not in seen: + seen.add(d.name) + deduped_diags.append(d) + resolved = [resolve_partial(partial) for partial in deduped_diags] + else: + # special case - if just one diagram, always display it, even if + # it has no name + resolved = [resolve_partial(partial) for partial in diags] + return sorted(resolved, key=lambda diag: diag.index) + + +def _should_vertical( + specification: int, exprs: Iterable[pyparsing.ParserElement] +) -> bool: + """ + Returns true if we should return a vertical list of elements + """ + if specification is None: + return False + else: + return len(_visible_exprs(exprs)) >= specification + + +class ElementState: + """ + State recorded for an individual pyparsing Element + """ + + # Note: this should be a dataclass, but we have to support Python 3.5 + def __init__( + self, + element: pyparsing.ParserElement, + converted: EditablePartial, + parent: EditablePartial, + number: int, + name: str = None, + parent_index: Optional[int] = None, + ): + #: The pyparsing element that this represents + self.element: pyparsing.ParserElement = element + #: The name of the element + self.name: str = name + #: The output Railroad element in an unconverted state + self.converted: EditablePartial = converted + #: The parent Railroad element, which we store so that we can extract this if it's duplicated + self.parent: EditablePartial = parent + #: The order in which we found this element, used for sorting diagrams if this is extracted into a diagram + self.number: int = number + #: The index of this inside its parent + self.parent_index: Optional[int] = parent_index + #: If true, we should extract this out into a subdiagram + self.extract: bool = False + #: If true, all of this element's children have been filled out + self.complete: bool = False + + def mark_for_extraction( + self, el_id: int, state: "ConverterState", name: str = None, force: bool = False + ): + """ + Called when this instance has been seen twice, and thus should eventually be extracted into a sub-diagram + :param el_id: id of the element + :param state: element/diagram state tracker + :param name: name to use for this element's text + :param force: If true, force extraction now, regardless of the state of this. Only useful for extracting the + root element when we know we're finished + """ + self.extract = True + + # Set the name + if not self.name: + if name: + # Allow forcing a custom name + self.name = name + elif self.element.customName: + self.name = self.element.customName + else: + self.name = "" + + # Just because this is marked for extraction doesn't mean we can do it yet. We may have to wait for children + # to be added + # Also, if this is just a string literal etc, don't bother extracting it + if force or (self.complete and _worth_extracting(self.element)): + state.extract_into_diagram(el_id) + + +class ConverterState: + """ + Stores some state that persists between recursions into the element tree + """ + + def __init__(self, diagram_kwargs: Optional[dict] = None): + #: A dictionary mapping ParserElements to state relating to them + self._element_diagram_states: Dict[int, ElementState] = {} + #: A dictionary mapping ParserElement IDs to subdiagrams generated from them + self.diagrams: Dict[int, EditablePartial[NamedDiagram]] = {} + #: The index of the next unnamed element + self.unnamed_index: int = 1 + #: The index of the next element. This is used for sorting + self.index: int = 0 + #: Shared kwargs that are used to customize the construction of diagrams + self.diagram_kwargs: dict = diagram_kwargs or {} + self.extracted_diagram_names: Set[str] = set() + + def __setitem__(self, key: int, value: ElementState): + self._element_diagram_states[key] = value + + def __getitem__(self, key: int) -> ElementState: + return self._element_diagram_states[key] + + def __delitem__(self, key: int): + del self._element_diagram_states[key] + + def __contains__(self, key: int): + return key in self._element_diagram_states + + def generate_unnamed(self) -> int: + """ + Generate a number used in the name of an otherwise unnamed diagram + """ + self.unnamed_index += 1 + return self.unnamed_index + + def generate_index(self) -> int: + """ + Generate a number used to index a diagram + """ + self.index += 1 + return self.index + + def extract_into_diagram(self, el_id: int): + """ + Used when we encounter the same token twice in the same tree. When this + happens, we replace all instances of that token with a terminal, and + create a new subdiagram for the token + """ + position = self[el_id] + + # Replace the original definition of this element with a regular block + if position.parent: + ret = EditablePartial.from_call(railroad.NonTerminal, text=position.name) + if "item" in position.parent.kwargs: + position.parent.kwargs["item"] = ret + elif "items" in position.parent.kwargs: + position.parent.kwargs["items"][position.parent_index] = ret + + # If the element we're extracting is a group, skip to its content but keep the title + if position.converted.func == railroad.Group: + content = position.converted.kwargs["item"] + else: + content = position.converted + + self.diagrams[el_id] = EditablePartial.from_call( + NamedDiagram, + name=position.name, + diagram=EditablePartial.from_call( + railroad.Diagram, content, **self.diagram_kwargs + ), + index=position.number, + ) + + del self[el_id] + + +def _worth_extracting(element: pyparsing.ParserElement) -> bool: + """ + Returns true if this element is worth having its own sub-diagram. Simply, if any of its children + themselves have children, then its complex enough to extract + """ + children = element.recurse() + return any(child.recurse() for child in children) + + +def _apply_diagram_item_enhancements(fn): + """ + decorator to ensure enhancements to a diagram item (such as results name annotations) + get applied on return from _to_diagram_element (we do this since there are several + returns in _to_diagram_element) + """ + + def _inner( + element: pyparsing.ParserElement, + parent: Optional[EditablePartial], + lookup: ConverterState = None, + vertical: int = None, + index: int = 0, + name_hint: str = None, + show_results_names: bool = False, + show_groups: bool = False, + ) -> Optional[EditablePartial]: + + ret = fn( + element, + parent, + lookup, + vertical, + index, + name_hint, + show_results_names, + show_groups, + ) + + # apply annotation for results name, if present + if show_results_names and ret is not None: + element_results_name = element.resultsName + if element_results_name: + # add "*" to indicate if this is a "list all results" name + element_results_name += "" if element.modalResults else "*" + ret = EditablePartial.from_call( + railroad.Group, item=ret, label=element_results_name + ) + + return ret + + return _inner + + +def _visible_exprs(exprs: Iterable[pyparsing.ParserElement]): + non_diagramming_exprs = ( + pyparsing.ParseElementEnhance, + pyparsing.PositionToken, + pyparsing.And._ErrorStop, + ) + return [ + e + for e in exprs + if not (e.customName or e.resultsName or isinstance(e, non_diagramming_exprs)) + ] + + +@_apply_diagram_item_enhancements +def _to_diagram_element( + element: pyparsing.ParserElement, + parent: Optional[EditablePartial], + lookup: ConverterState = None, + vertical: int = None, + index: int = 0, + name_hint: str = None, + show_results_names: bool = False, + show_groups: bool = False, +) -> Optional[EditablePartial]: + """ + Recursively converts a PyParsing Element to a railroad Element + :param lookup: The shared converter state that keeps track of useful things + :param index: The index of this element within the parent + :param parent: The parent of this element in the output tree + :param vertical: Controls at what point we make a list of elements vertical. If this is an integer (the default), + it sets the threshold of the number of items before we go vertical. If True, always go vertical, if False, never + do so + :param name_hint: If provided, this will override the generated name + :param show_results_names: bool flag indicating whether to add annotations for results names + :returns: The converted version of the input element, but as a Partial that hasn't yet been constructed + :param show_groups: bool flag indicating whether to show groups using bounding box + """ + exprs = element.recurse() + name = name_hint or element.customName or element.__class__.__name__ + + # Python's id() is used to provide a unique identifier for elements + el_id = id(element) + + element_results_name = element.resultsName + + # Here we basically bypass processing certain wrapper elements if they contribute nothing to the diagram + if not element.customName: + if isinstance( + element, + ( + # pyparsing.TokenConverter, + # pyparsing.Forward, + pyparsing.Located, + ), + ): + # However, if this element has a useful custom name, and its child does not, we can pass it on to the child + if exprs: + if not exprs[0].customName: + propagated_name = name + else: + propagated_name = None + + return _to_diagram_element( + element.expr, + parent=parent, + lookup=lookup, + vertical=vertical, + index=index, + name_hint=propagated_name, + show_results_names=show_results_names, + show_groups=show_groups, + ) + + # If the element isn't worth extracting, we always treat it as the first time we say it + if _worth_extracting(element): + if el_id in lookup: + # If we've seen this element exactly once before, we are only just now finding out that it's a duplicate, + # so we have to extract it into a new diagram. + looked_up = lookup[el_id] + looked_up.mark_for_extraction(el_id, lookup, name=name_hint) + ret = EditablePartial.from_call(railroad.NonTerminal, text=looked_up.name) + return ret + + elif el_id in lookup.diagrams: + # If we have seen the element at least twice before, and have already extracted it into a subdiagram, we + # just put in a marker element that refers to the sub-diagram + ret = EditablePartial.from_call( + railroad.NonTerminal, text=lookup.diagrams[el_id].kwargs["name"] + ) + return ret + + # Recursively convert child elements + # Here we find the most relevant Railroad element for matching pyparsing Element + # We use ``items=[]`` here to hold the place for where the child elements will go once created + if isinstance(element, pyparsing.And): + # detect And's created with ``expr*N`` notation - for these use a OneOrMore with a repeat + # (all will have the same name, and resultsName) + if not exprs: + return None + if len(set((e.name, e.resultsName) for e in exprs)) == 1: + ret = EditablePartial.from_call( + railroad.OneOrMore, item="", repeat=str(len(exprs)) + ) + elif _should_vertical(vertical, exprs): + ret = EditablePartial.from_call(railroad.Stack, items=[]) + else: + ret = EditablePartial.from_call(railroad.Sequence, items=[]) + elif isinstance(element, (pyparsing.Or, pyparsing.MatchFirst)): + if not exprs: + return None + if _should_vertical(vertical, exprs): + ret = EditablePartial.from_call(railroad.Choice, 0, items=[]) + else: + ret = EditablePartial.from_call(railroad.HorizontalChoice, items=[]) + elif isinstance(element, pyparsing.Each): + if not exprs: + return None + ret = EditablePartial.from_call(EachItem, items=[]) + elif isinstance(element, pyparsing.NotAny): + ret = EditablePartial.from_call(AnnotatedItem, label="NOT", item="") + elif isinstance(element, pyparsing.FollowedBy): + ret = EditablePartial.from_call(AnnotatedItem, label="LOOKAHEAD", item="") + elif isinstance(element, pyparsing.PrecededBy): + ret = EditablePartial.from_call(AnnotatedItem, label="LOOKBEHIND", item="") + elif isinstance(element, pyparsing.Group): + if show_groups: + ret = EditablePartial.from_call(AnnotatedItem, label="", item="") + else: + ret = EditablePartial.from_call(railroad.Group, label="", item="") + elif isinstance(element, pyparsing.TokenConverter): + ret = EditablePartial.from_call(AnnotatedItem, label=type(element).__name__.lower(), item="") + elif isinstance(element, pyparsing.Opt): + ret = EditablePartial.from_call(railroad.Optional, item="") + elif isinstance(element, pyparsing.OneOrMore): + ret = EditablePartial.from_call(railroad.OneOrMore, item="") + elif isinstance(element, pyparsing.ZeroOrMore): + ret = EditablePartial.from_call(railroad.ZeroOrMore, item="") + elif isinstance(element, pyparsing.Group): + ret = EditablePartial.from_call( + railroad.Group, item=None, label=element_results_name + ) + elif isinstance(element, pyparsing.Empty) and not element.customName: + # Skip unnamed "Empty" elements + ret = None + elif len(exprs) > 1: + ret = EditablePartial.from_call(railroad.Sequence, items=[]) + elif len(exprs) > 0 and not element_results_name: + ret = EditablePartial.from_call(railroad.Group, item="", label=name) + else: + terminal = EditablePartial.from_call(railroad.Terminal, element.defaultName) + ret = terminal + + if ret is None: + return + + # Indicate this element's position in the tree so we can extract it if necessary + lookup[el_id] = ElementState( + element=element, + converted=ret, + parent=parent, + parent_index=index, + number=lookup.generate_index(), + ) + if element.customName: + lookup[el_id].mark_for_extraction(el_id, lookup, element.customName) + + i = 0 + for expr in exprs: + # Add a placeholder index in case we have to extract the child before we even add it to the parent + if "items" in ret.kwargs: + ret.kwargs["items"].insert(i, None) + + item = _to_diagram_element( + expr, + parent=ret, + lookup=lookup, + vertical=vertical, + index=i, + show_results_names=show_results_names, + show_groups=show_groups, + ) + + # Some elements don't need to be shown in the diagram + if item is not None: + if "item" in ret.kwargs: + ret.kwargs["item"] = item + elif "items" in ret.kwargs: + # If we've already extracted the child, don't touch this index, since it's occupied by a nonterminal + ret.kwargs["items"][i] = item + i += 1 + elif "items" in ret.kwargs: + # If we're supposed to skip this element, remove it from the parent + del ret.kwargs["items"][i] + + # If all this items children are none, skip this item + if ret and ( + ("items" in ret.kwargs and len(ret.kwargs["items"]) == 0) + or ("item" in ret.kwargs and ret.kwargs["item"] is None) + ): + ret = EditablePartial.from_call(railroad.Terminal, name) + + # Mark this element as "complete", ie it has all of its children + if el_id in lookup: + lookup[el_id].complete = True + + if el_id in lookup and lookup[el_id].extract and lookup[el_id].complete: + lookup.extract_into_diagram(el_id) + if ret is not None: + ret = EditablePartial.from_call( + railroad.NonTerminal, text=lookup.diagrams[el_id].kwargs["name"] + ) + + return ret diff --git a/pkg_resources/_vendor/pyparsing/diagram/template.jinja2 b/pkg_resources/_vendor/pyparsing/diagram/template.jinja2 new file mode 100644 index 0000000..d2219fb --- /dev/null +++ b/pkg_resources/_vendor/pyparsing/diagram/template.jinja2 @@ -0,0 +1,26 @@ + + + + {% if not head %} + + {% else %} + {{ hear | safe }} + {% endif %} + + +{{ body | safe }} +{% for diagram in diagrams %} +
+

{{ diagram.title }}

+
{{ diagram.text }}
+
+ {{ diagram.svg }} +
+
+{% endfor %} + + diff --git a/pkg_resources/_vendor/pyparsing/exceptions.py b/pkg_resources/_vendor/pyparsing/exceptions.py new file mode 100644 index 0000000..e06513e --- /dev/null +++ b/pkg_resources/_vendor/pyparsing/exceptions.py @@ -0,0 +1,267 @@ +# exceptions.py + +import re +import sys +from typing import Optional + +from .util import col, line, lineno, _collapse_string_to_ranges +from .unicode import pyparsing_unicode as ppu + + +class ExceptionWordUnicode(ppu.Latin1, ppu.LatinA, ppu.LatinB, ppu.Greek, ppu.Cyrillic): + pass + + +_extract_alphanums = _collapse_string_to_ranges(ExceptionWordUnicode.alphanums) +_exception_word_extractor = re.compile("([" + _extract_alphanums + "]{1,16})|.") + + +class ParseBaseException(Exception): + """base exception class for all parsing runtime exceptions""" + + # Performance tuning: we construct a *lot* of these, so keep this + # constructor as small and fast as possible + def __init__( + self, + pstr: str, + loc: int = 0, + msg: Optional[str] = None, + elem=None, + ): + self.loc = loc + if msg is None: + self.msg = pstr + self.pstr = "" + else: + self.msg = msg + self.pstr = pstr + self.parser_element = self.parserElement = elem + self.args = (pstr, loc, msg) + + @staticmethod + def explain_exception(exc, depth=16): + """ + Method to take an exception and translate the Python internal traceback into a list + of the pyparsing expressions that caused the exception to be raised. + + Parameters: + + - exc - exception raised during parsing (need not be a ParseException, in support + of Python exceptions that might be raised in a parse action) + - depth (default=16) - number of levels back in the stack trace to list expression + and function names; if None, the full stack trace names will be listed; if 0, only + the failing input line, marker, and exception string will be shown + + Returns a multi-line string listing the ParserElements and/or function names in the + exception's stack trace. + """ + import inspect + from .core import ParserElement + + if depth is None: + depth = sys.getrecursionlimit() + ret = [] + if isinstance(exc, ParseBaseException): + ret.append(exc.line) + ret.append(" " * (exc.column - 1) + "^") + ret.append("{}: {}".format(type(exc).__name__, exc)) + + if depth > 0: + callers = inspect.getinnerframes(exc.__traceback__, context=depth) + seen = set() + for i, ff in enumerate(callers[-depth:]): + frm = ff[0] + + f_self = frm.f_locals.get("self", None) + if isinstance(f_self, ParserElement): + if frm.f_code.co_name not in ("parseImpl", "_parseNoCache"): + continue + if id(f_self) in seen: + continue + seen.add(id(f_self)) + + self_type = type(f_self) + ret.append( + "{}.{} - {}".format( + self_type.__module__, self_type.__name__, f_self + ) + ) + + elif f_self is not None: + self_type = type(f_self) + ret.append("{}.{}".format(self_type.__module__, self_type.__name__)) + + else: + code = frm.f_code + if code.co_name in ("wrapper", ""): + continue + + ret.append("{}".format(code.co_name)) + + depth -= 1 + if not depth: + break + + return "\n".join(ret) + + @classmethod + def _from_exception(cls, pe): + """ + internal factory method to simplify creating one type of ParseException + from another - avoids having __init__ signature conflicts among subclasses + """ + return cls(pe.pstr, pe.loc, pe.msg, pe.parserElement) + + @property + def line(self) -> str: + """ + Return the line of text where the exception occurred. + """ + return line(self.loc, self.pstr) + + @property + def lineno(self) -> int: + """ + Return the 1-based line number of text where the exception occurred. + """ + return lineno(self.loc, self.pstr) + + @property + def col(self) -> int: + """ + Return the 1-based column on the line of text where the exception occurred. + """ + return col(self.loc, self.pstr) + + @property + def column(self) -> int: + """ + Return the 1-based column on the line of text where the exception occurred. + """ + return col(self.loc, self.pstr) + + def __str__(self) -> str: + if self.pstr: + if self.loc >= len(self.pstr): + foundstr = ", found end of text" + else: + # pull out next word at error location + found_match = _exception_word_extractor.match(self.pstr, self.loc) + if found_match is not None: + found = found_match.group(0) + else: + found = self.pstr[self.loc : self.loc + 1] + foundstr = (", found %r" % found).replace(r"\\", "\\") + else: + foundstr = "" + return "{}{} (at char {}), (line:{}, col:{})".format( + self.msg, foundstr, self.loc, self.lineno, self.column + ) + + def __repr__(self): + return str(self) + + def mark_input_line(self, marker_string: str = None, *, markerString=">!<") -> str: + """ + Extracts the exception line from the input string, and marks + the location of the exception with a special symbol. + """ + markerString = marker_string if marker_string is not None else markerString + line_str = self.line + line_column = self.column - 1 + if markerString: + line_str = "".join( + (line_str[:line_column], markerString, line_str[line_column:]) + ) + return line_str.strip() + + def explain(self, depth=16) -> str: + """ + Method to translate the Python internal traceback into a list + of the pyparsing expressions that caused the exception to be raised. + + Parameters: + + - depth (default=16) - number of levels back in the stack trace to list expression + and function names; if None, the full stack trace names will be listed; if 0, only + the failing input line, marker, and exception string will be shown + + Returns a multi-line string listing the ParserElements and/or function names in the + exception's stack trace. + + Example:: + + expr = pp.Word(pp.nums) * 3 + try: + expr.parse_string("123 456 A789") + except pp.ParseException as pe: + print(pe.explain(depth=0)) + + prints:: + + 123 456 A789 + ^ + ParseException: Expected W:(0-9), found 'A' (at char 8), (line:1, col:9) + + Note: the diagnostic output will include string representations of the expressions + that failed to parse. These representations will be more helpful if you use `set_name` to + give identifiable names to your expressions. Otherwise they will use the default string + forms, which may be cryptic to read. + + Note: pyparsing's default truncation of exception tracebacks may also truncate the + stack of expressions that are displayed in the ``explain`` output. To get the full listing + of parser expressions, you may have to set ``ParserElement.verbose_stacktrace = True`` + """ + return self.explain_exception(self, depth) + + markInputline = mark_input_line + + +class ParseException(ParseBaseException): + """ + Exception thrown when a parse expression doesn't match the input string + + Example:: + + try: + Word(nums).set_name("integer").parse_string("ABC") + except ParseException as pe: + print(pe) + print("column: {}".format(pe.column)) + + prints:: + + Expected integer (at char 0), (line:1, col:1) + column: 1 + + """ + + +class ParseFatalException(ParseBaseException): + """ + User-throwable exception thrown when inconsistent parse content + is found; stops all parsing immediately + """ + + +class ParseSyntaxException(ParseFatalException): + """ + Just like :class:`ParseFatalException`, but thrown internally + when an :class:`ErrorStop` ('-' operator) indicates + that parsing is to stop immediately because an unbacktrackable + syntax error has been found. + """ + + +class RecursiveGrammarException(Exception): + """ + Exception thrown by :class:`ParserElement.validate` if the + grammar could be left-recursive; parser may need to enable + left recursion using :class:`ParserElement.enable_left_recursion` + """ + + def __init__(self, parseElementList): + self.parseElementTrace = parseElementList + + def __str__(self) -> str: + return "RecursiveGrammarException: {}".format(self.parseElementTrace) diff --git a/pkg_resources/_vendor/pyparsing/helpers.py b/pkg_resources/_vendor/pyparsing/helpers.py new file mode 100644 index 0000000..be8a365 --- /dev/null +++ b/pkg_resources/_vendor/pyparsing/helpers.py @@ -0,0 +1,1083 @@ +# helpers.py +import html.entities +import re + +from . import __diag__ +from .core import * +from .util import _bslash, _flatten, _escape_regex_range_chars + + +# +# global helpers +# +def delimited_list( + expr: Union[str, ParserElement], + delim: Union[str, ParserElement] = ",", + combine: bool = False, + min: OptionalType[int] = None, + max: OptionalType[int] = None, + *, + allow_trailing_delim: bool = False, +) -> ParserElement: + """Helper to define a delimited list of expressions - the delimiter + defaults to ','. By default, the list elements and delimiters can + have intervening whitespace, and comments, but this can be + overridden by passing ``combine=True`` in the constructor. If + ``combine`` is set to ``True``, the matching tokens are + returned as a single token string, with the delimiters included; + otherwise, the matching tokens are returned as a list of tokens, + with the delimiters suppressed. + + If ``allow_trailing_delim`` is set to True, then the list may end with + a delimiter. + + Example:: + + delimited_list(Word(alphas)).parse_string("aa,bb,cc") # -> ['aa', 'bb', 'cc'] + delimited_list(Word(hexnums), delim=':', combine=True).parse_string("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE'] + """ + if isinstance(expr, str_type): + expr = ParserElement._literalStringClass(expr) + + dlName = "{expr} [{delim} {expr}]...{end}".format( + expr=str(expr.copy().streamline()), + delim=str(delim), + end=" [{}]".format(str(delim)) if allow_trailing_delim else "", + ) + + if not combine: + delim = Suppress(delim) + + if min is not None: + if min < 1: + raise ValueError("min must be greater than 0") + min -= 1 + if max is not None: + if min is not None and max <= min: + raise ValueError("max must be greater than, or equal to min") + max -= 1 + delimited_list_expr = expr + (delim + expr)[min, max] + + if allow_trailing_delim: + delimited_list_expr += Opt(delim) + + if combine: + return Combine(delimited_list_expr).set_name(dlName) + else: + return delimited_list_expr.set_name(dlName) + + +def counted_array( + expr: ParserElement, + int_expr: OptionalType[ParserElement] = None, + *, + intExpr: OptionalType[ParserElement] = None, +) -> ParserElement: + """Helper to define a counted list of expressions. + + This helper defines a pattern of the form:: + + integer expr expr expr... + + where the leading integer tells how many expr expressions follow. + The matched tokens returns the array of expr tokens as a list - the + leading count token is suppressed. + + If ``int_expr`` is specified, it should be a pyparsing expression + that produces an integer value. + + Example:: + + counted_array(Word(alphas)).parse_string('2 ab cd ef') # -> ['ab', 'cd'] + + # in this parser, the leading integer value is given in binary, + # '10' indicating that 2 values are in the array + binary_constant = Word('01').set_parse_action(lambda t: int(t[0], 2)) + counted_array(Word(alphas), int_expr=binary_constant).parse_string('10 ab cd ef') # -> ['ab', 'cd'] + + # if other fields must be parsed after the count but before the + # list items, give the fields results names and they will + # be preserved in the returned ParseResults: + count_with_metadata = integer + Word(alphas)("type") + typed_array = counted_array(Word(alphanums), int_expr=count_with_metadata)("items") + result = typed_array.parse_string("3 bool True True False") + print(result.dump()) + + # prints + # ['True', 'True', 'False'] + # - items: ['True', 'True', 'False'] + # - type: 'bool' + """ + intExpr = intExpr or int_expr + array_expr = Forward() + + def count_field_parse_action(s, l, t): + nonlocal array_expr + n = t[0] + array_expr <<= (expr * n) if n else Empty() + # clear list contents, but keep any named results + del t[:] + + if intExpr is None: + intExpr = Word(nums).set_parse_action(lambda t: int(t[0])) + else: + intExpr = intExpr.copy() + intExpr.set_name("arrayLen") + intExpr.add_parse_action(count_field_parse_action, call_during_try=True) + return (intExpr + array_expr).set_name("(len) " + str(expr) + "...") + + +def match_previous_literal(expr: ParserElement) -> ParserElement: + """Helper to define an expression that is indirectly defined from + the tokens matched in a previous expression, that is, it looks for + a 'repeat' of a previous expression. For example:: + + first = Word(nums) + second = match_previous_literal(first) + match_expr = first + ":" + second + + will match ``"1:1"``, but not ``"1:2"``. Because this + matches a previous literal, will also match the leading + ``"1:1"`` in ``"1:10"``. If this is not desired, use + :class:`match_previous_expr`. Do *not* use with packrat parsing + enabled. + """ + rep = Forward() + + def copy_token_to_repeater(s, l, t): + if t: + if len(t) == 1: + rep << t[0] + else: + # flatten t tokens + tflat = _flatten(t.as_list()) + rep << And(Literal(tt) for tt in tflat) + else: + rep << Empty() + + expr.add_parse_action(copy_token_to_repeater, callDuringTry=True) + rep.set_name("(prev) " + str(expr)) + return rep + + +def match_previous_expr(expr: ParserElement) -> ParserElement: + """Helper to define an expression that is indirectly defined from + the tokens matched in a previous expression, that is, it looks for + a 'repeat' of a previous expression. For example:: + + first = Word(nums) + second = match_previous_expr(first) + match_expr = first + ":" + second + + will match ``"1:1"``, but not ``"1:2"``. Because this + matches by expressions, will *not* match the leading ``"1:1"`` + in ``"1:10"``; the expressions are evaluated first, and then + compared, so ``"1"`` is compared with ``"10"``. Do *not* use + with packrat parsing enabled. + """ + rep = Forward() + e2 = expr.copy() + rep <<= e2 + + def copy_token_to_repeater(s, l, t): + matchTokens = _flatten(t.as_list()) + + def must_match_these_tokens(s, l, t): + theseTokens = _flatten(t.as_list()) + if theseTokens != matchTokens: + raise ParseException( + s, l, "Expected {}, found{}".format(matchTokens, theseTokens) + ) + + rep.set_parse_action(must_match_these_tokens, callDuringTry=True) + + expr.add_parse_action(copy_token_to_repeater, callDuringTry=True) + rep.set_name("(prev) " + str(expr)) + return rep + + +def one_of( + strs: Union[IterableType[str], str], + caseless: bool = False, + use_regex: bool = True, + as_keyword: bool = False, + *, + useRegex: bool = True, + asKeyword: bool = False, +) -> ParserElement: + """Helper to quickly define a set of alternative :class:`Literal` s, + and makes sure to do longest-first testing when there is a conflict, + regardless of the input order, but returns + a :class:`MatchFirst` for best performance. + + Parameters: + + - ``strs`` - a string of space-delimited literals, or a collection of + string literals + - ``caseless`` - treat all literals as caseless - (default= ``False``) + - ``use_regex`` - as an optimization, will + generate a :class:`Regex` object; otherwise, will generate + a :class:`MatchFirst` object (if ``caseless=True`` or ``asKeyword=True``, or if + creating a :class:`Regex` raises an exception) - (default= ``True``) + - ``as_keyword`` - enforce :class:`Keyword`-style matching on the + generated expressions - (default= ``False``) + - ``asKeyword`` and ``useRegex`` are retained for pre-PEP8 compatibility, + but will be removed in a future release + + Example:: + + comp_oper = one_of("< = > <= >= !=") + var = Word(alphas) + number = Word(nums) + term = var | number + comparison_expr = term + comp_oper + term + print(comparison_expr.search_string("B = 12 AA=23 B<=AA AA>12")) + + prints:: + + [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']] + """ + asKeyword = asKeyword or as_keyword + useRegex = useRegex and use_regex + + if ( + isinstance(caseless, str_type) + and __diag__.warn_on_multiple_string_args_to_oneof + ): + warnings.warn( + "More than one string argument passed to one_of, pass" + " choices as a list or space-delimited string", + stacklevel=2, + ) + + if caseless: + isequal = lambda a, b: a.upper() == b.upper() + masks = lambda a, b: b.upper().startswith(a.upper()) + parseElementClass = CaselessKeyword if asKeyword else CaselessLiteral + else: + isequal = lambda a, b: a == b + masks = lambda a, b: b.startswith(a) + parseElementClass = Keyword if asKeyword else Literal + + symbols: List[str] = [] + if isinstance(strs, str_type): + symbols = strs.split() + elif isinstance(strs, Iterable): + symbols = list(strs) + else: + raise TypeError("Invalid argument to one_of, expected string or iterable") + if not symbols: + return NoMatch() + + # reorder given symbols to take care to avoid masking longer choices with shorter ones + # (but only if the given symbols are not just single characters) + if any(len(sym) > 1 for sym in symbols): + i = 0 + while i < len(symbols) - 1: + cur = symbols[i] + for j, other in enumerate(symbols[i + 1 :]): + if isequal(other, cur): + del symbols[i + j + 1] + break + elif masks(cur, other): + del symbols[i + j + 1] + symbols.insert(i, other) + break + else: + i += 1 + + if useRegex: + re_flags: int = re.IGNORECASE if caseless else 0 + + try: + if all(len(sym) == 1 for sym in symbols): + # symbols are just single characters, create range regex pattern + patt = "[{}]".format( + "".join(_escape_regex_range_chars(sym) for sym in symbols) + ) + else: + patt = "|".join(re.escape(sym) for sym in symbols) + + # wrap with \b word break markers if defining as keywords + if asKeyword: + patt = r"\b(?:{})\b".format(patt) + + ret = Regex(patt, flags=re_flags).set_name(" | ".join(symbols)) + + if caseless: + # add parse action to return symbols as specified, not in random + # casing as found in input string + symbol_map = {sym.lower(): sym for sym in symbols} + ret.add_parse_action(lambda s, l, t: symbol_map[t[0].lower()]) + + return ret + + except re.error: + warnings.warn( + "Exception creating Regex for one_of, building MatchFirst", stacklevel=2 + ) + + # last resort, just use MatchFirst + return MatchFirst(parseElementClass(sym) for sym in symbols).set_name( + " | ".join(symbols) + ) + + +def dict_of(key: ParserElement, value: ParserElement) -> ParserElement: + """Helper to easily and clearly define a dictionary by specifying + the respective patterns for the key and value. Takes care of + defining the :class:`Dict`, :class:`ZeroOrMore`, and + :class:`Group` tokens in the proper order. The key pattern + can include delimiting markers or punctuation, as long as they are + suppressed, thereby leaving the significant key text. The value + pattern can include named results, so that the :class:`Dict` results + can include named token fields. + + Example:: + + text = "shape: SQUARE posn: upper left color: light blue texture: burlap" + attr_expr = (label + Suppress(':') + OneOrMore(data_word, stop_on=label).set_parse_action(' '.join)) + print(OneOrMore(attr_expr).parse_string(text).dump()) + + attr_label = label + attr_value = Suppress(':') + OneOrMore(data_word, stop_on=label).set_parse_action(' '.join) + + # similar to Dict, but simpler call format + result = dict_of(attr_label, attr_value).parse_string(text) + print(result.dump()) + print(result['shape']) + print(result.shape) # object attribute access works too + print(result.as_dict()) + + prints:: + + [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']] + - color: 'light blue' + - posn: 'upper left' + - shape: 'SQUARE' + - texture: 'burlap' + SQUARE + SQUARE + {'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'} + """ + return Dict(OneOrMore(Group(key + value))) + + +def original_text_for( + expr: ParserElement, as_string: bool = True, *, asString: bool = True +) -> ParserElement: + """Helper to return the original, untokenized text for a given + expression. Useful to restore the parsed fields of an HTML start + tag into the raw tag text itself, or to revert separate tokens with + intervening whitespace back to the original matching input text. By + default, returns astring containing the original parsed text. + + If the optional ``as_string`` argument is passed as + ``False``, then the return value is + a :class:`ParseResults` containing any results names that + were originally matched, and a single token containing the original + matched text from the input string. So if the expression passed to + :class:`original_text_for` contains expressions with defined + results names, you must set ``as_string`` to ``False`` if you + want to preserve those results name values. + + The ``asString`` pre-PEP8 argument is retained for compatibility, + but will be removed in a future release. + + Example:: + + src = "this is test bold text normal text " + for tag in ("b", "i"): + opener, closer = make_html_tags(tag) + patt = original_text_for(opener + SkipTo(closer) + closer) + print(patt.search_string(src)[0]) + + prints:: + + [' bold text '] + ['text'] + """ + asString = asString and as_string + + locMarker = Empty().set_parse_action(lambda s, loc, t: loc) + endlocMarker = locMarker.copy() + endlocMarker.callPreparse = False + matchExpr = locMarker("_original_start") + expr + endlocMarker("_original_end") + if asString: + extractText = lambda s, l, t: s[t._original_start : t._original_end] + else: + + def extractText(s, l, t): + t[:] = [s[t.pop("_original_start") : t.pop("_original_end")]] + + matchExpr.set_parse_action(extractText) + matchExpr.ignoreExprs = expr.ignoreExprs + matchExpr.suppress_warning(Diagnostics.warn_ungrouped_named_tokens_in_collection) + return matchExpr + + +def ungroup(expr: ParserElement) -> ParserElement: + """Helper to undo pyparsing's default grouping of And expressions, + even if all but one are non-empty. + """ + return TokenConverter(expr).add_parse_action(lambda t: t[0]) + + +def locatedExpr(expr: ParserElement) -> ParserElement: + """ + (DEPRECATED - future code should use the Located class) + Helper to decorate a returned token with its starting and ending + locations in the input string. + + This helper adds the following results names: + + - ``locn_start`` - location where matched expression begins + - ``locn_end`` - location where matched expression ends + - ``value`` - the actual parsed results + + Be careful if the input text contains ```` characters, you + may want to call :class:`ParserElement.parseWithTabs` + + Example:: + + wd = Word(alphas) + for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"): + print(match) + + prints:: + + [[0, 'ljsdf', 5]] + [[8, 'lksdjjf', 15]] + [[18, 'lkkjj', 23]] + """ + locator = Empty().set_parse_action(lambda ss, ll, tt: ll) + return Group( + locator("locn_start") + + expr("value") + + locator.copy().leaveWhitespace()("locn_end") + ) + + +def nested_expr( + opener: Union[str, ParserElement] = "(", + closer: Union[str, ParserElement] = ")", + content: OptionalType[ParserElement] = None, + ignore_expr: ParserElement = quoted_string(), + *, + ignoreExpr: ParserElement = quoted_string(), +) -> ParserElement: + """Helper method for defining nested lists enclosed in opening and + closing delimiters (``"("`` and ``")"`` are the default). + + Parameters: + - ``opener`` - opening character for a nested list + (default= ``"("``); can also be a pyparsing expression + - ``closer`` - closing character for a nested list + (default= ``")"``); can also be a pyparsing expression + - ``content`` - expression for items within the nested lists + (default= ``None``) + - ``ignore_expr`` - expression for ignoring opening and closing delimiters + (default= :class:`quoted_string`) + - ``ignoreExpr`` - this pre-PEP8 argument is retained for compatibility + but will be removed in a future release + + If an expression is not provided for the content argument, the + nested expression will capture all whitespace-delimited content + between delimiters as a list of separate values. + + Use the ``ignore_expr`` argument to define expressions that may + contain opening or closing characters that should not be treated as + opening or closing characters for nesting, such as quoted_string or + a comment expression. Specify multiple expressions using an + :class:`Or` or :class:`MatchFirst`. The default is + :class:`quoted_string`, but if no expressions are to be ignored, then + pass ``None`` for this argument. + + Example:: + + data_type = one_of("void int short long char float double") + decl_data_type = Combine(data_type + Opt(Word('*'))) + ident = Word(alphas+'_', alphanums+'_') + number = pyparsing_common.number + arg = Group(decl_data_type + ident) + LPAR, RPAR = map(Suppress, "()") + + code_body = nested_expr('{', '}', ignore_expr=(quoted_string | c_style_comment)) + + c_function = (decl_data_type("type") + + ident("name") + + LPAR + Opt(delimited_list(arg), [])("args") + RPAR + + code_body("body")) + c_function.ignore(c_style_comment) + + source_code = ''' + int is_odd(int x) { + return (x%2); + } + + int dec_to_hex(char hchar) { + if (hchar >= '0' && hchar <= '9') { + return (ord(hchar)-ord('0')); + } else { + return (10+ord(hchar)-ord('A')); + } + } + ''' + for func in c_function.search_string(source_code): + print("%(name)s (%(type)s) args: %(args)s" % func) + + + prints:: + + is_odd (int) args: [['int', 'x']] + dec_to_hex (int) args: [['char', 'hchar']] + """ + if ignoreExpr != ignore_expr: + ignoreExpr = ignore_expr if ignoreExpr == quoted_string() else ignoreExpr + if opener == closer: + raise ValueError("opening and closing strings cannot be the same") + if content is None: + if isinstance(opener, str_type) and isinstance(closer, str_type): + if len(opener) == 1 and len(closer) == 1: + if ignoreExpr is not None: + content = Combine( + OneOrMore( + ~ignoreExpr + + CharsNotIn( + opener + closer + ParserElement.DEFAULT_WHITE_CHARS, + exact=1, + ) + ) + ).set_parse_action(lambda t: t[0].strip()) + else: + content = empty.copy() + CharsNotIn( + opener + closer + ParserElement.DEFAULT_WHITE_CHARS + ).set_parse_action(lambda t: t[0].strip()) + else: + if ignoreExpr is not None: + content = Combine( + OneOrMore( + ~ignoreExpr + + ~Literal(opener) + + ~Literal(closer) + + CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS, exact=1) + ) + ).set_parse_action(lambda t: t[0].strip()) + else: + content = Combine( + OneOrMore( + ~Literal(opener) + + ~Literal(closer) + + CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS, exact=1) + ) + ).set_parse_action(lambda t: t[0].strip()) + else: + raise ValueError( + "opening and closing arguments must be strings if no content expression is given" + ) + ret = Forward() + if ignoreExpr is not None: + ret <<= Group( + Suppress(opener) + ZeroOrMore(ignoreExpr | ret | content) + Suppress(closer) + ) + else: + ret <<= Group(Suppress(opener) + ZeroOrMore(ret | content) + Suppress(closer)) + ret.set_name("nested %s%s expression" % (opener, closer)) + return ret + + +def _makeTags(tagStr, xml, suppress_LT=Suppress("<"), suppress_GT=Suppress(">")): + """Internal helper to construct opening and closing tag expressions, given a tag name""" + if isinstance(tagStr, str_type): + resname = tagStr + tagStr = Keyword(tagStr, caseless=not xml) + else: + resname = tagStr.name + + tagAttrName = Word(alphas, alphanums + "_-:") + if xml: + tagAttrValue = dbl_quoted_string.copy().set_parse_action(remove_quotes) + openTag = ( + suppress_LT + + tagStr("tag") + + Dict(ZeroOrMore(Group(tagAttrName + Suppress("=") + tagAttrValue))) + + Opt("/", default=[False])("empty").set_parse_action( + lambda s, l, t: t[0] == "/" + ) + + suppress_GT + ) + else: + tagAttrValue = quoted_string.copy().set_parse_action(remove_quotes) | Word( + printables, exclude_chars=">" + ) + openTag = ( + suppress_LT + + tagStr("tag") + + Dict( + ZeroOrMore( + Group( + tagAttrName.set_parse_action(lambda t: t[0].lower()) + + Opt(Suppress("=") + tagAttrValue) + ) + ) + ) + + Opt("/", default=[False])("empty").set_parse_action( + lambda s, l, t: t[0] == "/" + ) + + suppress_GT + ) + closeTag = Combine(Literal("", adjacent=False) + + openTag.set_name("<%s>" % resname) + # add start results name in parse action now that ungrouped names are not reported at two levels + openTag.add_parse_action( + lambda t: t.__setitem__( + "start" + "".join(resname.replace(":", " ").title().split()), t.copy() + ) + ) + closeTag = closeTag( + "end" + "".join(resname.replace(":", " ").title().split()) + ).set_name("" % resname) + openTag.tag = resname + closeTag.tag = resname + openTag.tag_body = SkipTo(closeTag()) + return openTag, closeTag + + +def make_html_tags( + tag_str: Union[str, ParserElement] +) -> Tuple[ParserElement, ParserElement]: + """Helper to construct opening and closing tag expressions for HTML, + given a tag name. Matches tags in either upper or lower case, + attributes with namespaces and with quoted or unquoted values. + + Example:: + + text = 'More info at the pyparsing wiki page' + # make_html_tags returns pyparsing expressions for the opening and + # closing tags as a 2-tuple + a, a_end = make_html_tags("A") + link_expr = a + SkipTo(a_end)("link_text") + a_end + + for link in link_expr.search_string(text): + # attributes in the tag (like "href" shown here) are + # also accessible as named results + print(link.link_text, '->', link.href) + + prints:: + + pyparsing -> https://github.com/pyparsing/pyparsing/wiki + """ + return _makeTags(tag_str, False) + + +def make_xml_tags( + tag_str: Union[str, ParserElement] +) -> Tuple[ParserElement, ParserElement]: + """Helper to construct opening and closing tag expressions for XML, + given a tag name. Matches tags only in the given upper/lower case. + + Example: similar to :class:`make_html_tags` + """ + return _makeTags(tag_str, True) + + +any_open_tag, any_close_tag = make_html_tags( + Word(alphas, alphanums + "_:").set_name("any tag") +) + +_htmlEntityMap = {k.rstrip(";"): v for k, v in html.entities.html5.items()} +common_html_entity = Regex("&(?P" + "|".join(_htmlEntityMap) + ");").set_name( + "common HTML entity" +) + + +def replace_html_entity(t): + """Helper parser action to replace common HTML entities with their special characters""" + return _htmlEntityMap.get(t.entity) + + +class OpAssoc(Enum): + LEFT = 1 + RIGHT = 2 + + +InfixNotationOperatorArgType = Union[ + ParserElement, str, Tuple[Union[ParserElement, str], Union[ParserElement, str]] +] +InfixNotationOperatorSpec = Union[ + Tuple[ + InfixNotationOperatorArgType, + int, + OpAssoc, + OptionalType[ParseAction], + ], + Tuple[ + InfixNotationOperatorArgType, + int, + OpAssoc, + ], +] + + +def infix_notation( + base_expr: ParserElement, + op_list: List[InfixNotationOperatorSpec], + lpar: Union[str, ParserElement] = Suppress("("), + rpar: Union[str, ParserElement] = Suppress(")"), +) -> ParserElement: + """Helper method for constructing grammars of expressions made up of + operators working in a precedence hierarchy. Operators may be unary + or binary, left- or right-associative. Parse actions can also be + attached to operator expressions. The generated parser will also + recognize the use of parentheses to override operator precedences + (see example below). + + Note: if you define a deep operator list, you may see performance + issues when using infix_notation. See + :class:`ParserElement.enable_packrat` for a mechanism to potentially + improve your parser performance. + + Parameters: + - ``base_expr`` - expression representing the most basic operand to + be used in the expression + - ``op_list`` - list of tuples, one for each operator precedence level + in the expression grammar; each tuple is of the form ``(op_expr, + num_operands, right_left_assoc, (optional)parse_action)``, where: + + - ``op_expr`` is the pyparsing expression for the operator; may also + be a string, which will be converted to a Literal; if ``num_operands`` + is 3, ``op_expr`` is a tuple of two expressions, for the two + operators separating the 3 terms + - ``num_operands`` is the number of terms for this operator (must be 1, + 2, or 3) + - ``right_left_assoc`` is the indicator whether the operator is right + or left associative, using the pyparsing-defined constants + ``OpAssoc.RIGHT`` and ``OpAssoc.LEFT``. + - ``parse_action`` is the parse action to be associated with + expressions matching this operator expression (the parse action + tuple member may be omitted); if the parse action is passed + a tuple or list of functions, this is equivalent to calling + ``set_parse_action(*fn)`` + (:class:`ParserElement.set_parse_action`) + - ``lpar`` - expression for matching left-parentheses; if passed as a + str, then will be parsed as Suppress(lpar). If lpar is passed as + an expression (such as ``Literal('(')``), then it will be kept in + the parsed results, and grouped with them. (default= ``Suppress('(')``) + - ``rpar`` - expression for matching right-parentheses; if passed as a + str, then will be parsed as Suppress(rpar). If rpar is passed as + an expression (such as ``Literal(')')``), then it will be kept in + the parsed results, and grouped with them. (default= ``Suppress(')')``) + + Example:: + + # simple example of four-function arithmetic with ints and + # variable names + integer = pyparsing_common.signed_integer + varname = pyparsing_common.identifier + + arith_expr = infix_notation(integer | varname, + [ + ('-', 1, OpAssoc.RIGHT), + (one_of('* /'), 2, OpAssoc.LEFT), + (one_of('+ -'), 2, OpAssoc.LEFT), + ]) + + arith_expr.run_tests(''' + 5+3*6 + (5+3)*6 + -2--11 + ''', full_dump=False) + + prints:: + + 5+3*6 + [[5, '+', [3, '*', 6]]] + + (5+3)*6 + [[[5, '+', 3], '*', 6]] + + -2--11 + [[['-', 2], '-', ['-', 11]]] + """ + # captive version of FollowedBy that does not do parse actions or capture results names + class _FB(FollowedBy): + def parseImpl(self, instring, loc, doActions=True): + self.expr.try_parse(instring, loc) + return loc, [] + + _FB.__name__ = "FollowedBy>" + + ret = Forward() + if isinstance(lpar, str): + lpar = Suppress(lpar) + if isinstance(rpar, str): + rpar = Suppress(rpar) + + # if lpar and rpar are not suppressed, wrap in group + if not (isinstance(rpar, Suppress) and isinstance(rpar, Suppress)): + lastExpr = base_expr | Group(lpar + ret + rpar) + else: + lastExpr = base_expr | (lpar + ret + rpar) + + for i, operDef in enumerate(op_list): + opExpr, arity, rightLeftAssoc, pa = (operDef + (None,))[:4] + if isinstance(opExpr, str_type): + opExpr = ParserElement._literalStringClass(opExpr) + if arity == 3: + if not isinstance(opExpr, (tuple, list)) or len(opExpr) != 2: + raise ValueError( + "if numterms=3, opExpr must be a tuple or list of two expressions" + ) + opExpr1, opExpr2 = opExpr + term_name = "{}{} term".format(opExpr1, opExpr2) + else: + term_name = "{} term".format(opExpr) + + if not 1 <= arity <= 3: + raise ValueError("operator must be unary (1), binary (2), or ternary (3)") + + if rightLeftAssoc not in (OpAssoc.LEFT, OpAssoc.RIGHT): + raise ValueError("operator must indicate right or left associativity") + + thisExpr = Forward().set_name(term_name) + if rightLeftAssoc is OpAssoc.LEFT: + if arity == 1: + matchExpr = _FB(lastExpr + opExpr) + Group(lastExpr + opExpr[1, ...]) + elif arity == 2: + if opExpr is not None: + matchExpr = _FB(lastExpr + opExpr + lastExpr) + Group( + lastExpr + (opExpr + lastExpr)[1, ...] + ) + else: + matchExpr = _FB(lastExpr + lastExpr) + Group(lastExpr[2, ...]) + elif arity == 3: + matchExpr = _FB( + lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr + ) + Group(lastExpr + OneOrMore(opExpr1 + lastExpr + opExpr2 + lastExpr)) + elif rightLeftAssoc is OpAssoc.RIGHT: + if arity == 1: + # try to avoid LR with this extra test + if not isinstance(opExpr, Opt): + opExpr = Opt(opExpr) + matchExpr = _FB(opExpr.expr + thisExpr) + Group(opExpr + thisExpr) + elif arity == 2: + if opExpr is not None: + matchExpr = _FB(lastExpr + opExpr + thisExpr) + Group( + lastExpr + (opExpr + thisExpr)[1, ...] + ) + else: + matchExpr = _FB(lastExpr + thisExpr) + Group( + lastExpr + thisExpr[1, ...] + ) + elif arity == 3: + matchExpr = _FB( + lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr + ) + Group(lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr) + if pa: + if isinstance(pa, (tuple, list)): + matchExpr.set_parse_action(*pa) + else: + matchExpr.set_parse_action(pa) + thisExpr <<= (matchExpr | lastExpr).setName(term_name) + lastExpr = thisExpr + ret <<= lastExpr + return ret + + +def indentedBlock(blockStatementExpr, indentStack, indent=True, backup_stacks=[]): + """ + (DEPRECATED - use IndentedBlock class instead) + Helper method for defining space-delimited indentation blocks, + such as those used to define block statements in Python source code. + + Parameters: + + - ``blockStatementExpr`` - expression defining syntax of statement that + is repeated within the indented block + - ``indentStack`` - list created by caller to manage indentation stack + (multiple ``statementWithIndentedBlock`` expressions within a single + grammar should share a common ``indentStack``) + - ``indent`` - boolean indicating whether block must be indented beyond + the current level; set to ``False`` for block of left-most statements + (default= ``True``) + + A valid block must contain at least one ``blockStatement``. + + (Note that indentedBlock uses internal parse actions which make it + incompatible with packrat parsing.) + + Example:: + + data = ''' + def A(z): + A1 + B = 100 + G = A2 + A2 + A3 + B + def BB(a,b,c): + BB1 + def BBA(): + bba1 + bba2 + bba3 + C + D + def spam(x,y): + def eggs(z): + pass + ''' + + + indentStack = [1] + stmt = Forward() + + identifier = Word(alphas, alphanums) + funcDecl = ("def" + identifier + Group("(" + Opt(delimitedList(identifier)) + ")") + ":") + func_body = indentedBlock(stmt, indentStack) + funcDef = Group(funcDecl + func_body) + + rvalue = Forward() + funcCall = Group(identifier + "(" + Opt(delimitedList(rvalue)) + ")") + rvalue << (funcCall | identifier | Word(nums)) + assignment = Group(identifier + "=" + rvalue) + stmt << (funcDef | assignment | identifier) + + module_body = OneOrMore(stmt) + + parseTree = module_body.parseString(data) + parseTree.pprint() + + prints:: + + [['def', + 'A', + ['(', 'z', ')'], + ':', + [['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]], + 'B', + ['def', + 'BB', + ['(', 'a', 'b', 'c', ')'], + ':', + [['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]], + 'C', + 'D', + ['def', + 'spam', + ['(', 'x', 'y', ')'], + ':', + [[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]] + """ + backup_stacks.append(indentStack[:]) + + def reset_stack(): + indentStack[:] = backup_stacks[-1] + + def checkPeerIndent(s, l, t): + if l >= len(s): + return + curCol = col(l, s) + if curCol != indentStack[-1]: + if curCol > indentStack[-1]: + raise ParseException(s, l, "illegal nesting") + raise ParseException(s, l, "not a peer entry") + + def checkSubIndent(s, l, t): + curCol = col(l, s) + if curCol > indentStack[-1]: + indentStack.append(curCol) + else: + raise ParseException(s, l, "not a subentry") + + def checkUnindent(s, l, t): + if l >= len(s): + return + curCol = col(l, s) + if not (indentStack and curCol in indentStack): + raise ParseException(s, l, "not an unindent") + if curCol < indentStack[-1]: + indentStack.pop() + + NL = OneOrMore(LineEnd().set_whitespace_chars("\t ").suppress()) + INDENT = (Empty() + Empty().set_parse_action(checkSubIndent)).set_name("INDENT") + PEER = Empty().set_parse_action(checkPeerIndent).set_name("") + UNDENT = Empty().set_parse_action(checkUnindent).set_name("UNINDENT") + if indent: + smExpr = Group( + Opt(NL) + + INDENT + + OneOrMore(PEER + Group(blockStatementExpr) + Opt(NL)) + + UNDENT + ) + else: + smExpr = Group( + Opt(NL) + + OneOrMore(PEER + Group(blockStatementExpr) + Opt(NL)) + + Opt(UNDENT) + ) + + # add a parse action to remove backup_stack from list of backups + smExpr.add_parse_action( + lambda: backup_stacks.pop(-1) and None if backup_stacks else None + ) + smExpr.set_fail_action(lambda a, b, c, d: reset_stack()) + blockStatementExpr.ignore(_bslash + LineEnd()) + return smExpr.set_name("indented block") + + +# it's easy to get these comment structures wrong - they're very common, so may as well make them available +c_style_comment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + "*/").set_name( + "C style comment" +) +"Comment of the form ``/* ... */``" + +html_comment = Regex(r"").set_name("HTML comment") +"Comment of the form ````" + +rest_of_line = Regex(r".*").leave_whitespace().set_name("rest of line") +dbl_slash_comment = Regex(r"//(?:\\\n|[^\n])*").set_name("// comment") +"Comment of the form ``// ... (to end of line)``" + +cpp_style_comment = Combine( + Regex(r"/\*(?:[^*]|\*(?!/))*") + "*/" | dbl_slash_comment +).set_name("C++ style comment") +"Comment of either form :class:`c_style_comment` or :class:`dbl_slash_comment`" + +java_style_comment = cpp_style_comment +"Same as :class:`cpp_style_comment`" + +python_style_comment = Regex(r"#.*").set_name("Python style comment") +"Comment of the form ``# ... (to end of line)``" + + +# build list of built-in expressions, for future reference if a global default value +# gets updated +_builtin_exprs = [v for v in vars().values() if isinstance(v, ParserElement)] + + +# pre-PEP8 compatible names +delimitedList = delimited_list +countedArray = counted_array +matchPreviousLiteral = match_previous_literal +matchPreviousExpr = match_previous_expr +oneOf = one_of +dictOf = dict_of +originalTextFor = original_text_for +nestedExpr = nested_expr +makeHTMLTags = make_html_tags +makeXMLTags = make_xml_tags +anyOpenTag, anyCloseTag = any_open_tag, any_close_tag +commonHTMLEntity = common_html_entity +replaceHTMLEntity = replace_html_entity +opAssoc = OpAssoc +infixNotation = infix_notation +cStyleComment = c_style_comment +htmlComment = html_comment +restOfLine = rest_of_line +dblSlashComment = dbl_slash_comment +cppStyleComment = cpp_style_comment +javaStyleComment = java_style_comment +pythonStyleComment = python_style_comment diff --git a/pkg_resources/_vendor/pyparsing/py.typed b/pkg_resources/_vendor/pyparsing/py.typed new file mode 100644 index 0000000..e69de29 diff --git a/pkg_resources/_vendor/pyparsing/results.py b/pkg_resources/_vendor/pyparsing/results.py new file mode 100644 index 0000000..bb444df --- /dev/null +++ b/pkg_resources/_vendor/pyparsing/results.py @@ -0,0 +1,760 @@ +# results.py +from collections.abc import MutableMapping, Mapping, MutableSequence, Iterator +import pprint +from weakref import ref as wkref +from typing import Tuple, Any + +str_type: Tuple[type, ...] = (str, bytes) +_generator_type = type((_ for _ in ())) + + +class _ParseResultsWithOffset: + __slots__ = ["tup"] + + def __init__(self, p1, p2): + self.tup = (p1, p2) + + def __getitem__(self, i): + return self.tup[i] + + def __getstate__(self): + return self.tup + + def __setstate__(self, *args): + self.tup = args[0] + + +class ParseResults: + """Structured parse results, to provide multiple means of access to + the parsed data: + + - as a list (``len(results)``) + - by list index (``results[0], results[1]``, etc.) + - by attribute (``results.`` - see :class:`ParserElement.set_results_name`) + + Example:: + + integer = Word(nums) + date_str = (integer.set_results_name("year") + '/' + + integer.set_results_name("month") + '/' + + integer.set_results_name("day")) + # equivalent form: + # date_str = (integer("year") + '/' + # + integer("month") + '/' + # + integer("day")) + + # parse_string returns a ParseResults object + result = date_str.parse_string("1999/12/31") + + def test(s, fn=repr): + print("{} -> {}".format(s, fn(eval(s)))) + test("list(result)") + test("result[0]") + test("result['month']") + test("result.day") + test("'month' in result") + test("'minutes' in result") + test("result.dump()", str) + + prints:: + + list(result) -> ['1999', '/', '12', '/', '31'] + result[0] -> '1999' + result['month'] -> '12' + result.day -> '31' + 'month' in result -> True + 'minutes' in result -> False + result.dump() -> ['1999', '/', '12', '/', '31'] + - day: '31' + - month: '12' + - year: '1999' + """ + + _null_values: Tuple[Any, ...] = (None, [], "", ()) + + __slots__ = [ + "_name", + "_parent", + "_all_names", + "_modal", + "_toklist", + "_tokdict", + "__weakref__", + ] + + class List(list): + """ + Simple wrapper class to distinguish parsed list results that should be preserved + as actual Python lists, instead of being converted to :class:`ParseResults`: + + LBRACK, RBRACK = map(pp.Suppress, "[]") + element = pp.Forward() + item = ppc.integer + element_list = LBRACK + pp.delimited_list(element) + RBRACK + + # add parse actions to convert from ParseResults to actual Python collection types + def as_python_list(t): + return pp.ParseResults.List(t.as_list()) + element_list.add_parse_action(as_python_list) + + element <<= item | element_list + + element.run_tests(''' + 100 + [2,3,4] + [[2, 1],3,4] + [(2, 1),3,4] + (2,3,4) + ''', post_parse=lambda s, r: (r[0], type(r[0]))) + + prints: + + 100 + (100, ) + + [2,3,4] + ([2, 3, 4], ) + + [[2, 1],3,4] + ([[2, 1], 3, 4], ) + + (Used internally by :class:`Group` when `aslist=True`.) + """ + + def __new__(cls, contained=None): + if contained is None: + contained = [] + + if not isinstance(contained, list): + raise TypeError( + "{} may only be constructed with a list," + " not {}".format(cls.__name__, type(contained).__name__) + ) + + return list.__new__(cls) + + def __new__(cls, toklist=None, name=None, **kwargs): + if isinstance(toklist, ParseResults): + return toklist + self = object.__new__(cls) + self._name = None + self._parent = None + self._all_names = set() + + if toklist is None: + self._toklist = [] + elif isinstance(toklist, (list, _generator_type)): + self._toklist = ( + [toklist[:]] + if isinstance(toklist, ParseResults.List) + else list(toklist) + ) + else: + self._toklist = [toklist] + self._tokdict = dict() + return self + + # Performance tuning: we construct a *lot* of these, so keep this + # constructor as small and fast as possible + def __init__( + self, toklist=None, name=None, asList=True, modal=True, isinstance=isinstance + ): + self._modal = modal + if name is not None and name != "": + if isinstance(name, int): + name = str(name) + if not modal: + self._all_names = {name} + self._name = name + if toklist not in self._null_values: + if isinstance(toklist, (str_type, type)): + toklist = [toklist] + if asList: + if isinstance(toklist, ParseResults): + self[name] = _ParseResultsWithOffset( + ParseResults(toklist._toklist), 0 + ) + else: + self[name] = _ParseResultsWithOffset( + ParseResults(toklist[0]), 0 + ) + self[name]._name = name + else: + try: + self[name] = toklist[0] + except (KeyError, TypeError, IndexError): + if toklist is not self: + self[name] = toklist + else: + self._name = name + + def __getitem__(self, i): + if isinstance(i, (int, slice)): + return self._toklist[i] + else: + if i not in self._all_names: + return self._tokdict[i][-1][0] + else: + return ParseResults([v[0] for v in self._tokdict[i]]) + + def __setitem__(self, k, v, isinstance=isinstance): + if isinstance(v, _ParseResultsWithOffset): + self._tokdict[k] = self._tokdict.get(k, list()) + [v] + sub = v[0] + elif isinstance(k, (int, slice)): + self._toklist[k] = v + sub = v + else: + self._tokdict[k] = self._tokdict.get(k, list()) + [ + _ParseResultsWithOffset(v, 0) + ] + sub = v + if isinstance(sub, ParseResults): + sub._parent = wkref(self) + + def __delitem__(self, i): + if isinstance(i, (int, slice)): + mylen = len(self._toklist) + del self._toklist[i] + + # convert int to slice + if isinstance(i, int): + if i < 0: + i += mylen + i = slice(i, i + 1) + # get removed indices + removed = list(range(*i.indices(mylen))) + removed.reverse() + # fixup indices in token dictionary + for name, occurrences in self._tokdict.items(): + for j in removed: + for k, (value, position) in enumerate(occurrences): + occurrences[k] = _ParseResultsWithOffset( + value, position - (position > j) + ) + else: + del self._tokdict[i] + + def __contains__(self, k) -> bool: + return k in self._tokdict + + def __len__(self) -> int: + return len(self._toklist) + + def __bool__(self) -> bool: + return not not (self._toklist or self._tokdict) + + def __iter__(self) -> Iterator: + return iter(self._toklist) + + def __reversed__(self) -> Iterator: + return iter(self._toklist[::-1]) + + def keys(self): + return iter(self._tokdict) + + def values(self): + return (self[k] for k in self.keys()) + + def items(self): + return ((k, self[k]) for k in self.keys()) + + def haskeys(self) -> bool: + """ + Since ``keys()`` returns an iterator, this method is helpful in bypassing + code that looks for the existence of any defined results names.""" + return bool(self._tokdict) + + def pop(self, *args, **kwargs): + """ + Removes and returns item at specified index (default= ``last``). + Supports both ``list`` and ``dict`` semantics for ``pop()``. If + passed no argument or an integer argument, it will use ``list`` + semantics and pop tokens from the list of parsed tokens. If passed + a non-integer argument (most likely a string), it will use ``dict`` + semantics and pop the corresponding value from any defined results + names. A second default return value argument is supported, just as in + ``dict.pop()``. + + Example:: + + numlist = Word(nums)[...] + print(numlist.parse_string("0 123 321")) # -> ['0', '123', '321'] + + def remove_first(tokens): + tokens.pop(0) + numlist.add_parse_action(remove_first) + print(numlist.parse_string("0 123 321")) # -> ['123', '321'] + + label = Word(alphas) + patt = label("LABEL") + OneOrMore(Word(nums)) + print(patt.parse_string("AAB 123 321").dump()) + + # Use pop() in a parse action to remove named result (note that corresponding value is not + # removed from list form of results) + def remove_LABEL(tokens): + tokens.pop("LABEL") + return tokens + patt.add_parse_action(remove_LABEL) + print(patt.parse_string("AAB 123 321").dump()) + + prints:: + + ['AAB', '123', '321'] + - LABEL: 'AAB' + + ['AAB', '123', '321'] + """ + if not args: + args = [-1] + for k, v in kwargs.items(): + if k == "default": + args = (args[0], v) + else: + raise TypeError( + "pop() got an unexpected keyword argument {!r}".format(k) + ) + if isinstance(args[0], int) or len(args) == 1 or args[0] in self: + index = args[0] + ret = self[index] + del self[index] + return ret + else: + defaultvalue = args[1] + return defaultvalue + + def get(self, key, default_value=None): + """ + Returns named result matching the given key, or if there is no + such name, then returns the given ``default_value`` or ``None`` if no + ``default_value`` is specified. + + Similar to ``dict.get()``. + + Example:: + + integer = Word(nums) + date_str = integer("year") + '/' + integer("month") + '/' + integer("day") + + result = date_str.parse_string("1999/12/31") + print(result.get("year")) # -> '1999' + print(result.get("hour", "not specified")) # -> 'not specified' + print(result.get("hour")) # -> None + """ + if key in self: + return self[key] + else: + return default_value + + def insert(self, index, ins_string): + """ + Inserts new element at location index in the list of parsed tokens. + + Similar to ``list.insert()``. + + Example:: + + numlist = Word(nums)[...] + print(numlist.parse_string("0 123 321")) # -> ['0', '123', '321'] + + # use a parse action to insert the parse location in the front of the parsed results + def insert_locn(locn, tokens): + tokens.insert(0, locn) + numlist.add_parse_action(insert_locn) + print(numlist.parse_string("0 123 321")) # -> [0, '0', '123', '321'] + """ + self._toklist.insert(index, ins_string) + # fixup indices in token dictionary + for name, occurrences in self._tokdict.items(): + for k, (value, position) in enumerate(occurrences): + occurrences[k] = _ParseResultsWithOffset( + value, position + (position > index) + ) + + def append(self, item): + """ + Add single element to end of ``ParseResults`` list of elements. + + Example:: + + numlist = Word(nums)[...] + print(numlist.parse_string("0 123 321")) # -> ['0', '123', '321'] + + # use a parse action to compute the sum of the parsed integers, and add it to the end + def append_sum(tokens): + tokens.append(sum(map(int, tokens))) + numlist.add_parse_action(append_sum) + print(numlist.parse_string("0 123 321")) # -> ['0', '123', '321', 444] + """ + self._toklist.append(item) + + def extend(self, itemseq): + """ + Add sequence of elements to end of ``ParseResults`` list of elements. + + Example:: + + patt = OneOrMore(Word(alphas)) + + # use a parse action to append the reverse of the matched strings, to make a palindrome + def make_palindrome(tokens): + tokens.extend(reversed([t[::-1] for t in tokens])) + return ''.join(tokens) + patt.add_parse_action(make_palindrome) + print(patt.parse_string("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl' + """ + if isinstance(itemseq, ParseResults): + self.__iadd__(itemseq) + else: + self._toklist.extend(itemseq) + + def clear(self): + """ + Clear all elements and results names. + """ + del self._toklist[:] + self._tokdict.clear() + + def __getattr__(self, name): + try: + return self[name] + except KeyError: + if name.startswith("__"): + raise AttributeError(name) + return "" + + def __add__(self, other) -> "ParseResults": + ret = self.copy() + ret += other + return ret + + def __iadd__(self, other) -> "ParseResults": + if other._tokdict: + offset = len(self._toklist) + addoffset = lambda a: offset if a < 0 else a + offset + otheritems = other._tokdict.items() + otherdictitems = [ + (k, _ParseResultsWithOffset(v[0], addoffset(v[1]))) + for k, vlist in otheritems + for v in vlist + ] + for k, v in otherdictitems: + self[k] = v + if isinstance(v[0], ParseResults): + v[0]._parent = wkref(self) + + self._toklist += other._toklist + self._all_names |= other._all_names + return self + + def __radd__(self, other) -> "ParseResults": + if isinstance(other, int) and other == 0: + # useful for merging many ParseResults using sum() builtin + return self.copy() + else: + # this may raise a TypeError - so be it + return other + self + + def __repr__(self) -> str: + return "{}({!r}, {})".format(type(self).__name__, self._toklist, self.as_dict()) + + def __str__(self) -> str: + return ( + "[" + + ", ".join( + [ + str(i) if isinstance(i, ParseResults) else repr(i) + for i in self._toklist + ] + ) + + "]" + ) + + def _asStringList(self, sep=""): + out = [] + for item in self._toklist: + if out and sep: + out.append(sep) + if isinstance(item, ParseResults): + out += item._asStringList() + else: + out.append(str(item)) + return out + + def as_list(self) -> list: + """ + Returns the parse results as a nested list of matching tokens, all converted to strings. + + Example:: + + patt = OneOrMore(Word(alphas)) + result = patt.parse_string("sldkj lsdkj sldkj") + # even though the result prints in string-like form, it is actually a pyparsing ParseResults + print(type(result), result) # -> ['sldkj', 'lsdkj', 'sldkj'] + + # Use as_list() to create an actual list + result_list = result.as_list() + print(type(result_list), result_list) # -> ['sldkj', 'lsdkj', 'sldkj'] + """ + return [ + res.as_list() if isinstance(res, ParseResults) else res + for res in self._toklist + ] + + def as_dict(self) -> dict: + """ + Returns the named parse results as a nested dictionary. + + Example:: + + integer = Word(nums) + date_str = integer("year") + '/' + integer("month") + '/' + integer("day") + + result = date_str.parse_string('12/31/1999') + print(type(result), repr(result)) # -> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]}) + + result_dict = result.as_dict() + print(type(result_dict), repr(result_dict)) # -> {'day': '1999', 'year': '12', 'month': '31'} + + # even though a ParseResults supports dict-like access, sometime you just need to have a dict + import json + print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable + print(json.dumps(result.as_dict())) # -> {"month": "31", "day": "1999", "year": "12"} + """ + + def to_item(obj): + if isinstance(obj, ParseResults): + return obj.as_dict() if obj.haskeys() else [to_item(v) for v in obj] + else: + return obj + + return dict((k, to_item(v)) for k, v in self.items()) + + def copy(self) -> "ParseResults": + """ + Returns a new copy of a :class:`ParseResults` object. + """ + ret = ParseResults(self._toklist) + ret._tokdict = self._tokdict.copy() + ret._parent = self._parent + ret._all_names |= self._all_names + ret._name = self._name + return ret + + def get_name(self): + r""" + Returns the results name for this token expression. Useful when several + different expressions might match at a particular location. + + Example:: + + integer = Word(nums) + ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d") + house_number_expr = Suppress('#') + Word(nums, alphanums) + user_data = (Group(house_number_expr)("house_number") + | Group(ssn_expr)("ssn") + | Group(integer)("age")) + user_info = OneOrMore(user_data) + + result = user_info.parse_string("22 111-22-3333 #221B") + for item in result: + print(item.get_name(), ':', item[0]) + + prints:: + + age : 22 + ssn : 111-22-3333 + house_number : 221B + """ + if self._name: + return self._name + elif self._parent: + par = self._parent() + + def find_in_parent(sub): + return next( + ( + k + for k, vlist in par._tokdict.items() + for v, loc in vlist + if sub is v + ), + None, + ) + + return find_in_parent(self) if par else None + elif ( + len(self) == 1 + and len(self._tokdict) == 1 + and next(iter(self._tokdict.values()))[0][1] in (0, -1) + ): + return next(iter(self._tokdict.keys())) + else: + return None + + def dump(self, indent="", full=True, include_list=True, _depth=0) -> str: + """ + Diagnostic method for listing out the contents of + a :class:`ParseResults`. Accepts an optional ``indent`` argument so + that this string can be embedded in a nested display of other data. + + Example:: + + integer = Word(nums) + date_str = integer("year") + '/' + integer("month") + '/' + integer("day") + + result = date_str.parse_string('1999/12/31') + print(result.dump()) + + prints:: + + ['1999', '/', '12', '/', '31'] + - day: '31' + - month: '12' + - year: '1999' + """ + out = [] + NL = "\n" + out.append(indent + str(self.as_list()) if include_list else "") + + if full: + if self.haskeys(): + items = sorted((str(k), v) for k, v in self.items()) + for k, v in items: + if out: + out.append(NL) + out.append("{}{}- {}: ".format(indent, (" " * _depth), k)) + if isinstance(v, ParseResults): + if v: + out.append( + v.dump( + indent=indent, + full=full, + include_list=include_list, + _depth=_depth + 1, + ) + ) + else: + out.append(str(v)) + else: + out.append(repr(v)) + if any(isinstance(vv, ParseResults) for vv in self): + v = self + for i, vv in enumerate(v): + if isinstance(vv, ParseResults): + out.append( + "\n{}{}[{}]:\n{}{}{}".format( + indent, + (" " * (_depth)), + i, + indent, + (" " * (_depth + 1)), + vv.dump( + indent=indent, + full=full, + include_list=include_list, + _depth=_depth + 1, + ), + ) + ) + else: + out.append( + "\n%s%s[%d]:\n%s%s%s" + % ( + indent, + (" " * (_depth)), + i, + indent, + (" " * (_depth + 1)), + str(vv), + ) + ) + + return "".join(out) + + def pprint(self, *args, **kwargs): + """ + Pretty-printer for parsed results as a list, using the + `pprint `_ module. + Accepts additional positional or keyword args as defined for + `pprint.pprint `_ . + + Example:: + + ident = Word(alphas, alphanums) + num = Word(nums) + func = Forward() + term = ident | num | Group('(' + func + ')') + func <<= ident + Group(Optional(delimited_list(term))) + result = func.parse_string("fna a,b,(fnb c,d,200),100") + result.pprint(width=40) + + prints:: + + ['fna', + ['a', + 'b', + ['(', 'fnb', ['c', 'd', '200'], ')'], + '100']] + """ + pprint.pprint(self.as_list(), *args, **kwargs) + + # add support for pickle protocol + def __getstate__(self): + return ( + self._toklist, + ( + self._tokdict.copy(), + self._parent is not None and self._parent() or None, + self._all_names, + self._name, + ), + ) + + def __setstate__(self, state): + self._toklist, (self._tokdict, par, inAccumNames, self._name) = state + self._all_names = set(inAccumNames) + if par is not None: + self._parent = wkref(par) + else: + self._parent = None + + def __getnewargs__(self): + return self._toklist, self._name + + def __dir__(self): + return dir(type(self)) + list(self.keys()) + + @classmethod + def from_dict(cls, other, name=None) -> "ParseResults": + """ + Helper classmethod to construct a ``ParseResults`` from a ``dict``, preserving the + name-value relations as results names. If an optional ``name`` argument is + given, a nested ``ParseResults`` will be returned. + """ + + def is_iterable(obj): + try: + iter(obj) + except Exception: + return False + else: + return not isinstance(obj, str_type) + + ret = cls([]) + for k, v in other.items(): + if isinstance(v, Mapping): + ret += cls.from_dict(v, name=k) + else: + ret += cls([v], name=k, asList=is_iterable(v)) + if name is not None: + ret = cls([ret], name=name) + return ret + + asList = as_list + asDict = as_dict + getName = get_name + + +MutableMapping.register(ParseResults) +MutableSequence.register(ParseResults) diff --git a/pkg_resources/_vendor/pyparsing/testing.py b/pkg_resources/_vendor/pyparsing/testing.py new file mode 100644 index 0000000..991972f --- /dev/null +++ b/pkg_resources/_vendor/pyparsing/testing.py @@ -0,0 +1,331 @@ +# testing.py + +from contextlib import contextmanager +from typing import Optional + +from .core import ( + ParserElement, + ParseException, + Keyword, + __diag__, + __compat__, +) + + +class pyparsing_test: + """ + namespace class for classes useful in writing unit tests + """ + + class reset_pyparsing_context: + """ + Context manager to be used when writing unit tests that modify pyparsing config values: + - packrat parsing + - bounded recursion parsing + - default whitespace characters. + - default keyword characters + - literal string auto-conversion class + - __diag__ settings + + Example:: + + with reset_pyparsing_context(): + # test that literals used to construct a grammar are automatically suppressed + ParserElement.inlineLiteralsUsing(Suppress) + + term = Word(alphas) | Word(nums) + group = Group('(' + term[...] + ')') + + # assert that the '()' characters are not included in the parsed tokens + self.assertParseAndCheckList(group, "(abc 123 def)", ['abc', '123', 'def']) + + # after exiting context manager, literals are converted to Literal expressions again + """ + + def __init__(self): + self._save_context = {} + + def save(self): + self._save_context["default_whitespace"] = ParserElement.DEFAULT_WHITE_CHARS + self._save_context["default_keyword_chars"] = Keyword.DEFAULT_KEYWORD_CHARS + + self._save_context[ + "literal_string_class" + ] = ParserElement._literalStringClass + + self._save_context["verbose_stacktrace"] = ParserElement.verbose_stacktrace + + self._save_context["packrat_enabled"] = ParserElement._packratEnabled + if ParserElement._packratEnabled: + self._save_context[ + "packrat_cache_size" + ] = ParserElement.packrat_cache.size + else: + self._save_context["packrat_cache_size"] = None + self._save_context["packrat_parse"] = ParserElement._parse + self._save_context[ + "recursion_enabled" + ] = ParserElement._left_recursion_enabled + + self._save_context["__diag__"] = { + name: getattr(__diag__, name) for name in __diag__._all_names + } + + self._save_context["__compat__"] = { + "collect_all_And_tokens": __compat__.collect_all_And_tokens + } + + return self + + def restore(self): + # reset pyparsing global state + if ( + ParserElement.DEFAULT_WHITE_CHARS + != self._save_context["default_whitespace"] + ): + ParserElement.set_default_whitespace_chars( + self._save_context["default_whitespace"] + ) + + ParserElement.verbose_stacktrace = self._save_context["verbose_stacktrace"] + + Keyword.DEFAULT_KEYWORD_CHARS = self._save_context["default_keyword_chars"] + ParserElement.inlineLiteralsUsing( + self._save_context["literal_string_class"] + ) + + for name, value in self._save_context["__diag__"].items(): + (__diag__.enable if value else __diag__.disable)(name) + + ParserElement._packratEnabled = False + if self._save_context["packrat_enabled"]: + ParserElement.enable_packrat(self._save_context["packrat_cache_size"]) + else: + ParserElement._parse = self._save_context["packrat_parse"] + ParserElement._left_recursion_enabled = self._save_context[ + "recursion_enabled" + ] + + __compat__.collect_all_And_tokens = self._save_context["__compat__"] + + return self + + def copy(self): + ret = type(self)() + ret._save_context.update(self._save_context) + return ret + + def __enter__(self): + return self.save() + + def __exit__(self, *args): + self.restore() + + class TestParseResultsAsserts: + """ + A mixin class to add parse results assertion methods to normal unittest.TestCase classes. + """ + + def assertParseResultsEquals( + self, result, expected_list=None, expected_dict=None, msg=None + ): + """ + Unit test assertion to compare a :class:`ParseResults` object with an optional ``expected_list``, + and compare any defined results names with an optional ``expected_dict``. + """ + if expected_list is not None: + self.assertEqual(expected_list, result.as_list(), msg=msg) + if expected_dict is not None: + self.assertEqual(expected_dict, result.as_dict(), msg=msg) + + def assertParseAndCheckList( + self, expr, test_string, expected_list, msg=None, verbose=True + ): + """ + Convenience wrapper assert to test a parser element and input string, and assert that + the resulting ``ParseResults.asList()`` is equal to the ``expected_list``. + """ + result = expr.parse_string(test_string, parse_all=True) + if verbose: + print(result.dump()) + else: + print(result.as_list()) + self.assertParseResultsEquals(result, expected_list=expected_list, msg=msg) + + def assertParseAndCheckDict( + self, expr, test_string, expected_dict, msg=None, verbose=True + ): + """ + Convenience wrapper assert to test a parser element and input string, and assert that + the resulting ``ParseResults.asDict()`` is equal to the ``expected_dict``. + """ + result = expr.parse_string(test_string, parseAll=True) + if verbose: + print(result.dump()) + else: + print(result.as_list()) + self.assertParseResultsEquals(result, expected_dict=expected_dict, msg=msg) + + def assertRunTestResults( + self, run_tests_report, expected_parse_results=None, msg=None + ): + """ + Unit test assertion to evaluate output of ``ParserElement.runTests()``. If a list of + list-dict tuples is given as the ``expected_parse_results`` argument, then these are zipped + with the report tuples returned by ``runTests`` and evaluated using ``assertParseResultsEquals``. + Finally, asserts that the overall ``runTests()`` success value is ``True``. + + :param run_tests_report: tuple(bool, [tuple(str, ParseResults or Exception)]) returned from runTests + :param expected_parse_results (optional): [tuple(str, list, dict, Exception)] + """ + run_test_success, run_test_results = run_tests_report + + if expected_parse_results is not None: + merged = [ + (*rpt, expected) + for rpt, expected in zip(run_test_results, expected_parse_results) + ] + for test_string, result, expected in merged: + # expected should be a tuple containing a list and/or a dict or an exception, + # and optional failure message string + # an empty tuple will skip any result validation + fail_msg = next( + (exp for exp in expected if isinstance(exp, str)), None + ) + expected_exception = next( + ( + exp + for exp in expected + if isinstance(exp, type) and issubclass(exp, Exception) + ), + None, + ) + if expected_exception is not None: + with self.assertRaises( + expected_exception=expected_exception, msg=fail_msg or msg + ): + if isinstance(result, Exception): + raise result + else: + expected_list = next( + (exp for exp in expected if isinstance(exp, list)), None + ) + expected_dict = next( + (exp for exp in expected if isinstance(exp, dict)), None + ) + if (expected_list, expected_dict) != (None, None): + self.assertParseResultsEquals( + result, + expected_list=expected_list, + expected_dict=expected_dict, + msg=fail_msg or msg, + ) + else: + # warning here maybe? + print("no validation for {!r}".format(test_string)) + + # do this last, in case some specific test results can be reported instead + self.assertTrue( + run_test_success, msg=msg if msg is not None else "failed runTests" + ) + + @contextmanager + def assertRaisesParseException(self, exc_type=ParseException, msg=None): + with self.assertRaises(exc_type, msg=msg): + yield + + @staticmethod + def with_line_numbers( + s: str, + start_line: Optional[int] = None, + end_line: Optional[int] = None, + expand_tabs: bool = True, + eol_mark: str = "|", + mark_spaces: Optional[str] = None, + mark_control: Optional[str] = None, + ) -> str: + """ + Helpful method for debugging a parser - prints a string with line and column numbers. + (Line and column numbers are 1-based.) + + :param s: tuple(bool, str - string to be printed with line and column numbers + :param start_line: int - (optional) starting line number in s to print (default=1) + :param end_line: int - (optional) ending line number in s to print (default=len(s)) + :param expand_tabs: bool - (optional) expand tabs to spaces, to match the pyparsing default + :param eol_mark: str - (optional) string to mark the end of lines, helps visualize trailing spaces (default="|") + :param mark_spaces: str - (optional) special character to display in place of spaces + :param mark_control: str - (optional) convert non-printing control characters to a placeholding + character; valid values: + - "unicode" - replaces control chars with Unicode symbols, such as "␍" and "␊" + - any single character string - replace control characters with given string + - None (default) - string is displayed as-is + + :return: str - input string with leading line numbers and column number headers + """ + if expand_tabs: + s = s.expandtabs() + if mark_control is not None: + if mark_control == "unicode": + tbl = str.maketrans( + {c: u for c, u in zip(range(0, 33), range(0x2400, 0x2433))} + | {127: 0x2421} + ) + eol_mark = "" + else: + tbl = str.maketrans( + {c: mark_control for c in list(range(0, 32)) + [127]} + ) + s = s.translate(tbl) + if mark_spaces is not None and mark_spaces != " ": + if mark_spaces == "unicode": + tbl = str.maketrans({9: 0x2409, 32: 0x2423}) + s = s.translate(tbl) + else: + s = s.replace(" ", mark_spaces) + if start_line is None: + start_line = 1 + if end_line is None: + end_line = len(s) + end_line = min(end_line, len(s)) + start_line = min(max(1, start_line), end_line) + + if mark_control != "unicode": + s_lines = s.splitlines()[start_line - 1 : end_line] + else: + s_lines = [line + "␊" for line in s.split("␊")[start_line - 1 : end_line]] + if not s_lines: + return "" + + lineno_width = len(str(end_line)) + max_line_len = max(len(line) for line in s_lines) + lead = " " * (lineno_width + 1) + if max_line_len >= 99: + header0 = ( + lead + + "".join( + "{}{}".format(" " * 99, (i + 1) % 100) + for i in range(max(max_line_len // 100, 1)) + ) + + "\n" + ) + else: + header0 = "" + header1 = ( + header0 + + lead + + "".join( + " {}".format((i + 1) % 10) + for i in range(-(-max_line_len // 10)) + ) + + "\n" + ) + header2 = lead + "1234567890" * (-(-max_line_len // 10)) + "\n" + return ( + header1 + + header2 + + "\n".join( + "{:{}d}:{}{}".format(i, lineno_width, line, eol_mark) + for i, line in enumerate(s_lines, start=start_line) + ) + + "\n" + ) diff --git a/pkg_resources/_vendor/pyparsing/unicode.py b/pkg_resources/_vendor/pyparsing/unicode.py new file mode 100644 index 0000000..9226148 --- /dev/null +++ b/pkg_resources/_vendor/pyparsing/unicode.py @@ -0,0 +1,332 @@ +# unicode.py + +import sys +from itertools import filterfalse +from typing import List, Tuple, Union + + +class _lazyclassproperty: + def __init__(self, fn): + self.fn = fn + self.__doc__ = fn.__doc__ + self.__name__ = fn.__name__ + + def __get__(self, obj, cls): + if cls is None: + cls = type(obj) + if not hasattr(cls, "_intern") or any( + cls._intern is getattr(superclass, "_intern", []) + for superclass in cls.__mro__[1:] + ): + cls._intern = {} + attrname = self.fn.__name__ + if attrname not in cls._intern: + cls._intern[attrname] = self.fn(cls) + return cls._intern[attrname] + + +UnicodeRangeList = List[Union[Tuple[int, int], Tuple[int]]] + + +class unicode_set: + """ + A set of Unicode characters, for language-specific strings for + ``alphas``, ``nums``, ``alphanums``, and ``printables``. + A unicode_set is defined by a list of ranges in the Unicode character + set, in a class attribute ``_ranges``. Ranges can be specified using + 2-tuples or a 1-tuple, such as:: + + _ranges = [ + (0x0020, 0x007e), + (0x00a0, 0x00ff), + (0x0100,), + ] + + Ranges are left- and right-inclusive. A 1-tuple of (x,) is treated as (x, x). + + A unicode set can also be defined using multiple inheritance of other unicode sets:: + + class CJK(Chinese, Japanese, Korean): + pass + """ + + _ranges: UnicodeRangeList = [] + + @_lazyclassproperty + def _chars_for_ranges(cls): + ret = [] + for cc in cls.__mro__: + if cc is unicode_set: + break + for rr in getattr(cc, "_ranges", ()): + ret.extend(range(rr[0], rr[-1] + 1)) + return [chr(c) for c in sorted(set(ret))] + + @_lazyclassproperty + def printables(cls): + "all non-whitespace characters in this range" + return "".join(filterfalse(str.isspace, cls._chars_for_ranges)) + + @_lazyclassproperty + def alphas(cls): + "all alphabetic characters in this range" + return "".join(filter(str.isalpha, cls._chars_for_ranges)) + + @_lazyclassproperty + def nums(cls): + "all numeric digit characters in this range" + return "".join(filter(str.isdigit, cls._chars_for_ranges)) + + @_lazyclassproperty + def alphanums(cls): + "all alphanumeric characters in this range" + return cls.alphas + cls.nums + + @_lazyclassproperty + def identchars(cls): + "all characters in this range that are valid identifier characters, plus underscore '_'" + return "".join( + sorted( + set( + "".join(filter(str.isidentifier, cls._chars_for_ranges)) + + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzªµº" + + "ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ" + + "_" + ) + ) + ) + + @_lazyclassproperty + def identbodychars(cls): + """ + all characters in this range that are valid identifier body characters, + plus the digits 0-9 + """ + return "".join( + sorted( + set( + cls.identchars + + "0123456789" + + "".join( + [c for c in cls._chars_for_ranges if ("_" + c).isidentifier()] + ) + ) + ) + ) + + +class pyparsing_unicode(unicode_set): + """ + A namespace class for defining common language unicode_sets. + """ + + _ranges: UnicodeRangeList = [(32, sys.maxunicode)] + + class Latin1(unicode_set): + "Unicode set for Latin-1 Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x0020, 0x007E), + (0x00A0, 0x00FF), + ] + + class LatinA(unicode_set): + "Unicode set for Latin-A Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x0100, 0x017F), + ] + + class LatinB(unicode_set): + "Unicode set for Latin-B Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x0180, 0x024F), + ] + + class Greek(unicode_set): + "Unicode set for Greek Unicode Character Ranges" + _ranges: UnicodeRangeList = [ + (0x0342, 0x0345), + (0x0370, 0x0377), + (0x037A, 0x037F), + (0x0384, 0x038A), + (0x038C,), + (0x038E, 0x03A1), + (0x03A3, 0x03E1), + (0x03F0, 0x03FF), + (0x1D26, 0x1D2A), + (0x1D5E,), + (0x1D60,), + (0x1D66, 0x1D6A), + (0x1F00, 0x1F15), + (0x1F18, 0x1F1D), + (0x1F20, 0x1F45), + (0x1F48, 0x1F4D), + (0x1F50, 0x1F57), + (0x1F59,), + (0x1F5B,), + (0x1F5D,), + (0x1F5F, 0x1F7D), + (0x1F80, 0x1FB4), + (0x1FB6, 0x1FC4), + (0x1FC6, 0x1FD3), + (0x1FD6, 0x1FDB), + (0x1FDD, 0x1FEF), + (0x1FF2, 0x1FF4), + (0x1FF6, 0x1FFE), + (0x2129,), + (0x2719, 0x271A), + (0xAB65,), + (0x10140, 0x1018D), + (0x101A0,), + (0x1D200, 0x1D245), + (0x1F7A1, 0x1F7A7), + ] + + class Cyrillic(unicode_set): + "Unicode set for Cyrillic Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x0400, 0x052F), + (0x1C80, 0x1C88), + (0x1D2B,), + (0x1D78,), + (0x2DE0, 0x2DFF), + (0xA640, 0xA672), + (0xA674, 0xA69F), + (0xFE2E, 0xFE2F), + ] + + class Chinese(unicode_set): + "Unicode set for Chinese Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x2E80, 0x2E99), + (0x2E9B, 0x2EF3), + (0x31C0, 0x31E3), + (0x3400, 0x4DB5), + (0x4E00, 0x9FEF), + (0xA700, 0xA707), + (0xF900, 0xFA6D), + (0xFA70, 0xFAD9), + (0x16FE2, 0x16FE3), + (0x1F210, 0x1F212), + (0x1F214, 0x1F23B), + (0x1F240, 0x1F248), + (0x20000, 0x2A6D6), + (0x2A700, 0x2B734), + (0x2B740, 0x2B81D), + (0x2B820, 0x2CEA1), + (0x2CEB0, 0x2EBE0), + (0x2F800, 0x2FA1D), + ] + + class Japanese(unicode_set): + "Unicode set for Japanese Unicode Character Range, combining Kanji, Hiragana, and Katakana ranges" + _ranges: UnicodeRangeList = [] + + class Kanji(unicode_set): + "Unicode set for Kanji Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x4E00, 0x9FBF), + (0x3000, 0x303F), + ] + + class Hiragana(unicode_set): + "Unicode set for Hiragana Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x3041, 0x3096), + (0x3099, 0x30A0), + (0x30FC,), + (0xFF70,), + (0x1B001,), + (0x1B150, 0x1B152), + (0x1F200,), + ] + + class Katakana(unicode_set): + "Unicode set for Katakana Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x3099, 0x309C), + (0x30A0, 0x30FF), + (0x31F0, 0x31FF), + (0x32D0, 0x32FE), + (0xFF65, 0xFF9F), + (0x1B000,), + (0x1B164, 0x1B167), + (0x1F201, 0x1F202), + (0x1F213,), + ] + + class Hangul(unicode_set): + "Unicode set for Hangul (Korean) Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x1100, 0x11FF), + (0x302E, 0x302F), + (0x3131, 0x318E), + (0x3200, 0x321C), + (0x3260, 0x327B), + (0x327E,), + (0xA960, 0xA97C), + (0xAC00, 0xD7A3), + (0xD7B0, 0xD7C6), + (0xD7CB, 0xD7FB), + (0xFFA0, 0xFFBE), + (0xFFC2, 0xFFC7), + (0xFFCA, 0xFFCF), + (0xFFD2, 0xFFD7), + (0xFFDA, 0xFFDC), + ] + + Korean = Hangul + + class CJK(Chinese, Japanese, Hangul): + "Unicode set for combined Chinese, Japanese, and Korean (CJK) Unicode Character Range" + pass + + class Thai(unicode_set): + "Unicode set for Thai Unicode Character Range" + _ranges: UnicodeRangeList = [(0x0E01, 0x0E3A), (0x0E3F, 0x0E5B)] + + class Arabic(unicode_set): + "Unicode set for Arabic Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x0600, 0x061B), + (0x061E, 0x06FF), + (0x0700, 0x077F), + ] + + class Hebrew(unicode_set): + "Unicode set for Hebrew Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x0591, 0x05C7), + (0x05D0, 0x05EA), + (0x05EF, 0x05F4), + (0xFB1D, 0xFB36), + (0xFB38, 0xFB3C), + (0xFB3E,), + (0xFB40, 0xFB41), + (0xFB43, 0xFB44), + (0xFB46, 0xFB4F), + ] + + class Devanagari(unicode_set): + "Unicode set for Devanagari Unicode Character Range" + _ranges: UnicodeRangeList = [(0x0900, 0x097F), (0xA8E0, 0xA8FF)] + + +pyparsing_unicode.Japanese._ranges = ( + pyparsing_unicode.Japanese.Kanji._ranges + + pyparsing_unicode.Japanese.Hiragana._ranges + + pyparsing_unicode.Japanese.Katakana._ranges +) + +# define ranges in language character sets +pyparsing_unicode.العربية = pyparsing_unicode.Arabic +pyparsing_unicode.中文 = pyparsing_unicode.Chinese +pyparsing_unicode.кириллица = pyparsing_unicode.Cyrillic +pyparsing_unicode.Ελληνικά = pyparsing_unicode.Greek +pyparsing_unicode.עִברִית = pyparsing_unicode.Hebrew +pyparsing_unicode.日本語 = pyparsing_unicode.Japanese +pyparsing_unicode.Japanese.漢字 = pyparsing_unicode.Japanese.Kanji +pyparsing_unicode.Japanese.カタカナ = pyparsing_unicode.Japanese.Katakana +pyparsing_unicode.Japanese.ひらがな = pyparsing_unicode.Japanese.Hiragana +pyparsing_unicode.한국어 = pyparsing_unicode.Korean +pyparsing_unicode.ไทย = pyparsing_unicode.Thai +pyparsing_unicode.देवनागरी = pyparsing_unicode.Devanagari diff --git a/pkg_resources/_vendor/pyparsing/util.py b/pkg_resources/_vendor/pyparsing/util.py new file mode 100644 index 0000000..34ce092 --- /dev/null +++ b/pkg_resources/_vendor/pyparsing/util.py @@ -0,0 +1,235 @@ +# util.py +import warnings +import types +import collections +import itertools +from functools import lru_cache +from typing import List, Union, Iterable + +_bslash = chr(92) + + +class __config_flags: + """Internal class for defining compatibility and debugging flags""" + + _all_names: List[str] = [] + _fixed_names: List[str] = [] + _type_desc = "configuration" + + @classmethod + def _set(cls, dname, value): + if dname in cls._fixed_names: + warnings.warn( + "{}.{} {} is {} and cannot be overridden".format( + cls.__name__, + dname, + cls._type_desc, + str(getattr(cls, dname)).upper(), + ) + ) + return + if dname in cls._all_names: + setattr(cls, dname, value) + else: + raise ValueError("no such {} {!r}".format(cls._type_desc, dname)) + + enable = classmethod(lambda cls, name: cls._set(name, True)) + disable = classmethod(lambda cls, name: cls._set(name, False)) + + +@lru_cache(maxsize=128) +def col(loc: int, strg: str) -> int: + """ + Returns current column within a string, counting newlines as line separators. + The first column is number 1. + + Note: the default parsing behavior is to expand tabs in the input string + before starting the parsing process. See + :class:`ParserElement.parseString` for more + information on parsing strings containing ```` s, and suggested + methods to maintain a consistent view of the parsed string, the parse + location, and line and column positions within the parsed string. + """ + s = strg + return 1 if 0 < loc < len(s) and s[loc - 1] == "\n" else loc - s.rfind("\n", 0, loc) + + +@lru_cache(maxsize=128) +def lineno(loc: int, strg: str) -> int: + """Returns current line number within a string, counting newlines as line separators. + The first line is number 1. + + Note - the default parsing behavior is to expand tabs in the input string + before starting the parsing process. See :class:`ParserElement.parseString` + for more information on parsing strings containing ```` s, and + suggested methods to maintain a consistent view of the parsed string, the + parse location, and line and column positions within the parsed string. + """ + return strg.count("\n", 0, loc) + 1 + + +@lru_cache(maxsize=128) +def line(loc: int, strg: str) -> str: + """ + Returns the line of text containing loc within a string, counting newlines as line separators. + """ + last_cr = strg.rfind("\n", 0, loc) + next_cr = strg.find("\n", loc) + return strg[last_cr + 1 : next_cr] if next_cr >= 0 else strg[last_cr + 1 :] + + +class _UnboundedCache: + def __init__(self): + cache = {} + cache_get = cache.get + self.not_in_cache = not_in_cache = object() + + def get(_, key): + return cache_get(key, not_in_cache) + + def set_(_, key, value): + cache[key] = value + + def clear(_): + cache.clear() + + self.size = None + self.get = types.MethodType(get, self) + self.set = types.MethodType(set_, self) + self.clear = types.MethodType(clear, self) + + +class _FifoCache: + def __init__(self, size): + self.not_in_cache = not_in_cache = object() + cache = collections.OrderedDict() + cache_get = cache.get + + def get(_, key): + return cache_get(key, not_in_cache) + + def set_(_, key, value): + cache[key] = value + while len(cache) > size: + cache.popitem(last=False) + + def clear(_): + cache.clear() + + self.size = size + self.get = types.MethodType(get, self) + self.set = types.MethodType(set_, self) + self.clear = types.MethodType(clear, self) + + +class LRUMemo: + """ + A memoizing mapping that retains `capacity` deleted items + + The memo tracks retained items by their access order; once `capacity` items + are retained, the least recently used item is discarded. + """ + + def __init__(self, capacity): + self._capacity = capacity + self._active = {} + self._memory = collections.OrderedDict() + + def __getitem__(self, key): + try: + return self._active[key] + except KeyError: + self._memory.move_to_end(key) + return self._memory[key] + + def __setitem__(self, key, value): + self._memory.pop(key, None) + self._active[key] = value + + def __delitem__(self, key): + try: + value = self._active.pop(key) + except KeyError: + pass + else: + while len(self._memory) >= self._capacity: + self._memory.popitem(last=False) + self._memory[key] = value + + def clear(self): + self._active.clear() + self._memory.clear() + + +class UnboundedMemo(dict): + """ + A memoizing mapping that retains all deleted items + """ + + def __delitem__(self, key): + pass + + +def _escape_regex_range_chars(s: str) -> str: + # escape these chars: ^-[] + for c in r"\^-[]": + s = s.replace(c, _bslash + c) + s = s.replace("\n", r"\n") + s = s.replace("\t", r"\t") + return str(s) + + +def _collapse_string_to_ranges( + s: Union[str, Iterable[str]], re_escape: bool = True +) -> str: + def is_consecutive(c): + c_int = ord(c) + is_consecutive.prev, prev = c_int, is_consecutive.prev + if c_int - prev > 1: + is_consecutive.value = next(is_consecutive.counter) + return is_consecutive.value + + is_consecutive.prev = 0 + is_consecutive.counter = itertools.count() + is_consecutive.value = -1 + + def escape_re_range_char(c): + return "\\" + c if c in r"\^-][" else c + + def no_escape_re_range_char(c): + return c + + if not re_escape: + escape_re_range_char = no_escape_re_range_char + + ret = [] + s = "".join(sorted(set(s))) + if len(s) > 3: + for _, chars in itertools.groupby(s, key=is_consecutive): + first = last = next(chars) + last = collections.deque( + itertools.chain(iter([last]), chars), maxlen=1 + ).pop() + if first == last: + ret.append(escape_re_range_char(first)) + else: + sep = "" if ord(last) == ord(first) + 1 else "-" + ret.append( + "{}{}{}".format( + escape_re_range_char(first), sep, escape_re_range_char(last) + ) + ) + else: + ret = [escape_re_range_char(c) for c in s] + + return "".join(ret) + + +def _flatten(ll: list) -> list: + ret = [] + for i in ll: + if isinstance(i, list): + ret.extend(_flatten(i)) + else: + ret.append(i) + return ret diff --git a/pkg_resources/_vendor/vendored.txt b/pkg_resources/_vendor/vendored.txt index d5dbe73..8f9c263 100644 --- a/pkg_resources/_vendor/vendored.txt +++ b/pkg_resources/_vendor/vendored.txt @@ -1,5 +1,5 @@ packaging==21.3 -pyparsing==2.2.1 +pyparsing==3.0.8 appdirs==1.4.3 jaraco.text==3.7.0 # required for jaraco.text on older Pythons diff --git a/setup.cfg b/setup.cfg index 0dec946..a4b0333 100644 --- a/setup.cfg +++ b/setup.cfg @@ -1,6 +1,6 @@ [metadata] name = setuptools -version = 62.2.0 +version = 62.3.0 author = Python Packaging Authority author_email = distutils-sig@python.org description = Easily download, build, install, upgrade, and uninstall Python packages @@ -93,6 +93,7 @@ docs = pygments-github-lexers==0.0.5 sphinx-favicon sphinx-inline-tabs + sphinx-reredirects sphinxcontrib-towncrier furo diff --git a/setuptools/_importlib.py b/setuptools/_importlib.py index c1ac137..819bf5d 100644 --- a/setuptools/_importlib.py +++ b/setuptools/_importlib.py @@ -12,6 +12,17 @@ def disable_importlib_metadata_finder(metadata): import importlib_metadata except ImportError: return + except AttributeError: + import warnings + + msg = ( + "`importlib-metadata` version is incompatible with `setuptools`.\n" + "This problem is likely to be solved by installing an updated version of " + "`importlib-metadata`." + ) + warnings.warn(msg) # Ensure a descriptive message is shown. + raise # This exception can be suppressed by _distutils_hack + if importlib_metadata is metadata: return to_remove = [ diff --git a/setuptools/_vendor/pyparsing-2.2.1.dist-info/DESCRIPTION.rst b/setuptools/_vendor/pyparsing-2.2.1.dist-info/DESCRIPTION.rst deleted file mode 100644 index e118723..0000000 --- a/setuptools/_vendor/pyparsing-2.2.1.dist-info/DESCRIPTION.rst +++ /dev/null @@ -1,3 +0,0 @@ -UNKNOWN - - diff --git a/setuptools/_vendor/pyparsing-2.2.1.dist-info/INSTALLER b/setuptools/_vendor/pyparsing-2.2.1.dist-info/INSTALLER deleted file mode 100644 index a1b589e..0000000 --- a/setuptools/_vendor/pyparsing-2.2.1.dist-info/INSTALLER +++ /dev/null @@ -1 +0,0 @@ -pip diff --git a/setuptools/_vendor/pyparsing-2.2.1.dist-info/LICENSE.txt b/setuptools/_vendor/pyparsing-2.2.1.dist-info/LICENSE.txt deleted file mode 100644 index bbc959e..0000000 --- a/setuptools/_vendor/pyparsing-2.2.1.dist-info/LICENSE.txt +++ /dev/null @@ -1,18 +0,0 @@ -Permission is hereby granted, free of charge, to any person obtaining -a copy of this software and associated documentation files (the -"Software"), to deal in the Software without restriction, including -without limitation the rights to use, copy, modify, merge, publish, -distribute, sublicense, and/or sell copies of the Software, and to -permit persons to whom the Software is furnished to do so, subject to -the following conditions: - -The above copyright notice and this permission notice shall be -included in all copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, -EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. -IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY -CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, -TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE -SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/setuptools/_vendor/pyparsing-2.2.1.dist-info/METADATA b/setuptools/_vendor/pyparsing-2.2.1.dist-info/METADATA deleted file mode 100644 index a15c350..0000000 --- a/setuptools/_vendor/pyparsing-2.2.1.dist-info/METADATA +++ /dev/null @@ -1,30 +0,0 @@ -Metadata-Version: 2.0 -Name: pyparsing -Version: 2.2.1 -Summary: Python parsing module -Home-page: https://github.com/pyparsing/pyparsing/ -Author: Paul McGuire -Author-email: ptmcg@users.sourceforge.net -License: MIT License -Download-URL: https://pypi.org/project/pyparsing/ -Platform: UNKNOWN -Classifier: Development Status :: 5 - Production/Stable -Classifier: Intended Audience :: Developers -Classifier: Intended Audience :: Information Technology -Classifier: License :: OSI Approved :: MIT License -Classifier: Operating System :: OS Independent -Classifier: Programming Language :: Python -Classifier: Programming Language :: Python :: 2 -Classifier: Programming Language :: Python :: 2.6 -Classifier: Programming Language :: Python :: 2.7 -Classifier: Programming Language :: Python :: 3 -Classifier: Programming Language :: Python :: 3.3 -Classifier: Programming Language :: Python :: 3.4 -Classifier: Programming Language :: Python :: 3.5 -Classifier: Programming Language :: Python :: 3.6 -Classifier: Programming Language :: Python :: 3.7 -Requires-Python: >=2.6, !=3.0.*, !=3.1.*, !=3.2.* - -UNKNOWN - - diff --git a/setuptools/_vendor/pyparsing-2.2.1.dist-info/RECORD b/setuptools/_vendor/pyparsing-2.2.1.dist-info/RECORD deleted file mode 100644 index 09cc30e..0000000 --- a/setuptools/_vendor/pyparsing-2.2.1.dist-info/RECORD +++ /dev/null @@ -1,11 +0,0 @@ -__pycache__/pyparsing.cpython-310.pyc,, -pyparsing-2.2.1.dist-info/DESCRIPTION.rst,sha256=OCTuuN6LcWulhHS3d5rfjdsQtW22n7HENFRh6jC6ego,10 -pyparsing-2.2.1.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4 -pyparsing-2.2.1.dist-info/LICENSE.txt,sha256=081Pq74Spe1XdwrGkewNKSqa078kLIh7UWI-wVjdj8I,1041 -pyparsing-2.2.1.dist-info/METADATA,sha256=I0jhx9vpUYlQXjn4gVDnFFoAt3nNrxwR4iuqA_pknYs,1091 -pyparsing-2.2.1.dist-info/RECORD,, -pyparsing-2.2.1.dist-info/REQUESTED,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0 -pyparsing-2.2.1.dist-info/WHEEL,sha256=kdsN-5OJAZIiHN-iO4Rhl82KyS0bDWf4uBwMbkNafr8,110 -pyparsing-2.2.1.dist-info/metadata.json,sha256=v1_77-dSdajUZSItSJg8Ov9M713STY3PzhyrRvs1ax4,1185 -pyparsing-2.2.1.dist-info/top_level.txt,sha256=eUOjGzJVhlQ3WS2rFAy2mN3LX_7FKTM5GSJ04jfnLmU,10 -pyparsing.py,sha256=tmrp-lu-qO1i75ZzIN5A12nKRRD1Cm4Vpk-5LR9rims,232055 diff --git a/setuptools/_vendor/pyparsing-2.2.1.dist-info/REQUESTED b/setuptools/_vendor/pyparsing-2.2.1.dist-info/REQUESTED deleted file mode 100644 index e69de29..0000000 diff --git a/setuptools/_vendor/pyparsing-2.2.1.dist-info/WHEEL b/setuptools/_vendor/pyparsing-2.2.1.dist-info/WHEEL deleted file mode 100644 index 7332a41..0000000 --- a/setuptools/_vendor/pyparsing-2.2.1.dist-info/WHEEL +++ /dev/null @@ -1,6 +0,0 @@ -Wheel-Version: 1.0 -Generator: bdist_wheel (0.30.0) -Root-Is-Purelib: true -Tag: py2-none-any -Tag: py3-none-any - diff --git a/setuptools/_vendor/pyparsing-2.2.1.dist-info/metadata.json b/setuptools/_vendor/pyparsing-2.2.1.dist-info/metadata.json deleted file mode 100644 index b760b76..0000000 --- a/setuptools/_vendor/pyparsing-2.2.1.dist-info/metadata.json +++ /dev/null @@ -1 +0,0 @@ -{"classifiers": ["Development Status :: 5 - Production/Stable", "Intended Audience :: Developers", "Intended Audience :: Information Technology", "License :: OSI Approved :: MIT License", "Operating System :: OS Independent", "Programming Language :: Python", "Programming Language :: Python :: 2", "Programming Language :: Python :: 2.6", "Programming Language :: Python :: 2.7", "Programming Language :: Python :: 3", "Programming Language :: Python :: 3.3", "Programming Language :: Python :: 3.4", "Programming Language :: Python :: 3.5", "Programming Language :: Python :: 3.6", "Programming Language :: Python :: 3.7"], "download_url": "https://pypi.org/project/pyparsing/", "extensions": {"python.details": {"contacts": [{"email": "ptmcg@users.sourceforge.net", "name": "Paul McGuire", "role": "author"}], "document_names": {"description": "DESCRIPTION.rst", "license": "LICENSE.txt"}, "project_urls": {"Home": "https://github.com/pyparsing/pyparsing/"}}}, "generator": "bdist_wheel (0.30.0)", "license": "MIT License", "metadata_version": "2.0", "name": "pyparsing", "requires_python": ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*", "summary": "Python parsing module", "version": "2.2.1"} \ No newline at end of file diff --git a/setuptools/_vendor/pyparsing-2.2.1.dist-info/top_level.txt b/setuptools/_vendor/pyparsing-2.2.1.dist-info/top_level.txt deleted file mode 100644 index 210dfec..0000000 --- a/setuptools/_vendor/pyparsing-2.2.1.dist-info/top_level.txt +++ /dev/null @@ -1 +0,0 @@ -pyparsing diff --git a/setuptools/_vendor/pyparsing-3.0.8.dist-info/INSTALLER b/setuptools/_vendor/pyparsing-3.0.8.dist-info/INSTALLER new file mode 100644 index 0000000..a1b589e --- /dev/null +++ b/setuptools/_vendor/pyparsing-3.0.8.dist-info/INSTALLER @@ -0,0 +1 @@ +pip diff --git a/setuptools/_vendor/pyparsing-3.0.8.dist-info/LICENSE b/setuptools/_vendor/pyparsing-3.0.8.dist-info/LICENSE new file mode 100644 index 0000000..1bf9852 --- /dev/null +++ b/setuptools/_vendor/pyparsing-3.0.8.dist-info/LICENSE @@ -0,0 +1,18 @@ +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/setuptools/_vendor/pyparsing-3.0.8.dist-info/METADATA b/setuptools/_vendor/pyparsing-3.0.8.dist-info/METADATA new file mode 100644 index 0000000..d6c8e9b --- /dev/null +++ b/setuptools/_vendor/pyparsing-3.0.8.dist-info/METADATA @@ -0,0 +1,105 @@ +Metadata-Version: 2.1 +Name: pyparsing +Version: 3.0.8 +Summary: pyparsing module - Classes and methods to define and execute parsing grammars +Author-email: Paul McGuire +Requires-Python: >=3.6.8 +Description-Content-Type: text/x-rst +Classifier: Development Status :: 5 - Production/Stable +Classifier: Intended Audience :: Developers +Classifier: Intended Audience :: Information Technology +Classifier: License :: OSI Approved :: MIT License +Classifier: Operating System :: OS Independent +Classifier: Programming Language :: Python +Classifier: Programming Language :: Python :: 3 +Classifier: Programming Language :: Python :: 3.6 +Classifier: Programming Language :: Python :: 3.7 +Classifier: Programming Language :: Python :: 3.8 +Classifier: Programming Language :: Python :: 3.9 +Classifier: Programming Language :: Python :: 3.10 +Classifier: Programming Language :: Python :: 3 :: Only +Classifier: Programming Language :: Python :: Implementation :: CPython +Classifier: Programming Language :: Python :: Implementation :: PyPy +Classifier: Typing :: Typed +Requires-Dist: railroad-diagrams ; extra == "diagrams" +Requires-Dist: jinja2 ; extra == "diagrams" +Project-URL: Homepage, https://github.com/pyparsing/pyparsing/ +Provides-Extra: diagrams + +PyParsing -- A Python Parsing Module +==================================== + +|Build Status| |Coverage| + +Introduction +============ + +The pyparsing module is an alternative approach to creating and +executing simple grammars, vs. the traditional lex/yacc approach, or the +use of regular expressions. The pyparsing module provides a library of +classes that client code uses to construct the grammar directly in +Python code. + +*[Since first writing this description of pyparsing in late 2003, this +technique for developing parsers has become more widespread, under the +name Parsing Expression Grammars - PEGs. See more information on PEGs* +`here `__ +*.]* + +Here is a program to parse ``"Hello, World!"`` (or any greeting of the form +``"salutation, addressee!"``): + +.. code:: python + + from pyparsing import Word, alphas + greet = Word(alphas) + "," + Word(alphas) + "!" + hello = "Hello, World!" + print(hello, "->", greet.parseString(hello)) + +The program outputs the following:: + + Hello, World! -> ['Hello', ',', 'World', '!'] + +The Python representation of the grammar is quite readable, owing to the +self-explanatory class names, and the use of '+', '|' and '^' operator +definitions. + +The parsed results returned from ``parseString()`` is a collection of type +``ParseResults``, which can be accessed as a +nested list, a dictionary, or an object with named attributes. + +The pyparsing module handles some of the problems that are typically +vexing when writing text parsers: + +- extra or missing whitespace (the above program will also handle ``"Hello,World!"``, ``"Hello , World !"``, etc.) +- quoted strings +- embedded comments + +The examples directory includes a simple SQL parser, simple CORBA IDL +parser, a config file parser, a chemical formula parser, and a four- +function algebraic notation parser, among many others. + +Documentation +============= + +There are many examples in the online docstrings of the classes +and methods in pyparsing. You can find them compiled into `online docs `__. Additional +documentation resources and project info are listed in the online +`GitHub wiki `__. An +entire directory of examples can be found `here `__. + +License +======= + +MIT License. See header of the `pyparsing.py `__ file. + +History +======= + +See `CHANGES `__ file. + +.. |Build Status| image:: https://github.com/pyparsing/pyparsing/actions/workflows/ci.yml/badge.svg + :target: https://github.com/pyparsing/pyparsing/actions/workflows/ci.yml +.. |Coverage| image:: https://codecov.io/gh/pyparsing/pyparsing/branch/master/graph/badge.svg + :target: https://codecov.io/gh/pyparsing/pyparsing + diff --git a/setuptools/_vendor/pyparsing-3.0.8.dist-info/RECORD b/setuptools/_vendor/pyparsing-3.0.8.dist-info/RECORD new file mode 100644 index 0000000..72947b0 --- /dev/null +++ b/setuptools/_vendor/pyparsing-3.0.8.dist-info/RECORD @@ -0,0 +1,30 @@ +pyparsing-3.0.8.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4 +pyparsing-3.0.8.dist-info/LICENSE,sha256=ENUSChaAWAT_2otojCIL-06POXQbVzIGBNRVowngGXI,1023 +pyparsing-3.0.8.dist-info/METADATA,sha256=dEvZBGz3Owm5LYEaqDeKb6e3ZgOrF48WaCI_PG1n5BE,4207 +pyparsing-3.0.8.dist-info/RECORD,, +pyparsing-3.0.8.dist-info/REQUESTED,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0 +pyparsing-3.0.8.dist-info/WHEEL,sha256=jPMR_Dzkc4X4icQtmz81lnNY_kAsfog7ry7qoRvYLXw,81 +pyparsing/__init__.py,sha256=EMa1HCuq9HJhEDR8fUThu2gD0nl6Cs8FFEWZZ0eRCM8,9159 +pyparsing/__pycache__/__init__.cpython-38.pyc,, +pyparsing/__pycache__/actions.cpython-38.pyc,, +pyparsing/__pycache__/common.cpython-38.pyc,, +pyparsing/__pycache__/core.cpython-38.pyc,, +pyparsing/__pycache__/exceptions.cpython-38.pyc,, +pyparsing/__pycache__/helpers.cpython-38.pyc,, +pyparsing/__pycache__/results.cpython-38.pyc,, +pyparsing/__pycache__/testing.cpython-38.pyc,, +pyparsing/__pycache__/unicode.cpython-38.pyc,, +pyparsing/__pycache__/util.cpython-38.pyc,, +pyparsing/actions.py,sha256=60v7mETOBzc01YPH_qQD5isavgcSJpAfIKpzgjM3vaU,6429 +pyparsing/common.py,sha256=lFL97ooIeR75CmW5hjURZqwDCTgruqltcTCZ-ulLO2Q,12936 +pyparsing/core.py,sha256=zBzGw5vcSd58pB1QkYpY6O_XCcHVKX_nH5xglRx_L-M,213278 +pyparsing/diagram/__init__.py,sha256=oU_UEh6O5voKSFjUdq462_mpmURLOfUIsmWvxi1qgTQ,23003 +pyparsing/diagram/__pycache__/__init__.cpython-38.pyc,, +pyparsing/diagram/template.jinja2,sha256=SfQ8SLktSBqI5W1DGcUVH1vdflRD6x2sQBApxrcNg7s,589 +pyparsing/exceptions.py,sha256=H4D9gqMavqmAFSsdrU_J6bO-jA-T-A7yvtXWZpooIUA,9030 +pyparsing/helpers.py,sha256=EyjpgDOc3ivwRsU4VXxAWdgIs5gaqMDaLWcwRh5mqxc,39007 +pyparsing/py.typed,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0 +pyparsing/results.py,sha256=Hd6FAAh5sF8zGXpwsamdVqFUblIwyQf0FH0t7FCb1OY,25353 +pyparsing/testing.py,sha256=szs8AKZREZMhL0y0vsMfaTVAnpqPHetg6VKJBNmc4QY,13388 +pyparsing/unicode.py,sha256=IR-ioeGY29cZ49tG8Ts7ITPWWNP5G2DcZs58oa8zn44,10381 +pyparsing/util.py,sha256=kq772O5YSeXOSdP-M31EWpbH_ayj7BMHImBYo9xPD5M,6805 diff --git a/setuptools/_vendor/pyparsing-3.0.8.dist-info/REQUESTED b/setuptools/_vendor/pyparsing-3.0.8.dist-info/REQUESTED new file mode 100644 index 0000000..e69de29 diff --git a/setuptools/_vendor/pyparsing-3.0.8.dist-info/WHEEL b/setuptools/_vendor/pyparsing-3.0.8.dist-info/WHEEL new file mode 100644 index 0000000..c727d14 --- /dev/null +++ b/setuptools/_vendor/pyparsing-3.0.8.dist-info/WHEEL @@ -0,0 +1,4 @@ +Wheel-Version: 1.0 +Generator: flit 3.6.0 +Root-Is-Purelib: true +Tag: py3-none-any diff --git a/setuptools/_vendor/pyparsing.py b/setuptools/_vendor/pyparsing.py deleted file mode 100644 index cf75e1e..0000000 --- a/setuptools/_vendor/pyparsing.py +++ /dev/null @@ -1,5742 +0,0 @@ -# module pyparsing.py -# -# Copyright (c) 2003-2018 Paul T. McGuire -# -# Permission is hereby granted, free of charge, to any person obtaining -# a copy of this software and associated documentation files (the -# "Software"), to deal in the Software without restriction, including -# without limitation the rights to use, copy, modify, merge, publish, -# distribute, sublicense, and/or sell copies of the Software, and to -# permit persons to whom the Software is furnished to do so, subject to -# the following conditions: -# -# The above copyright notice and this permission notice shall be -# included in all copies or substantial portions of the Software. -# -# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, -# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. -# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY -# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, -# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE -# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. -# - -__doc__ = \ -""" -pyparsing module - Classes and methods to define and execute parsing grammars -============================================================================= - -The pyparsing module is an alternative approach to creating and executing simple grammars, -vs. the traditional lex/yacc approach, or the use of regular expressions. With pyparsing, you -don't need to learn a new syntax for defining grammars or matching expressions - the parsing module -provides a library of classes that you use to construct the grammar directly in Python. - -Here is a program to parse "Hello, World!" (or any greeting of the form -C{", !"}), built up using L{Word}, L{Literal}, and L{And} elements -(L{'+'} operator gives L{And} expressions, strings are auto-converted to -L{Literal} expressions):: - - from pyparsing import Word, alphas - - # define grammar of a greeting - greet = Word(alphas) + "," + Word(alphas) + "!" - - hello = "Hello, World!" - print (hello, "->", greet.parseString(hello)) - -The program outputs the following:: - - Hello, World! -> ['Hello', ',', 'World', '!'] - -The Python representation of the grammar is quite readable, owing to the self-explanatory -class names, and the use of '+', '|' and '^' operators. - -The L{ParseResults} object returned from L{ParserElement.parseString} can be accessed as a nested list, a dictionary, or an -object with named attributes. - -The pyparsing module handles some of the problems that are typically vexing when writing text parsers: - - extra or missing whitespace (the above program will also handle "Hello,World!", "Hello , World !", etc.) - - quoted strings - - embedded comments - - -Getting Started - ------------------ -Visit the classes L{ParserElement} and L{ParseResults} to see the base classes that most other pyparsing -classes inherit from. Use the docstrings for examples of how to: - - construct literal match expressions from L{Literal} and L{CaselessLiteral} classes - - construct character word-group expressions using the L{Word} class - - see how to create repetitive expressions using L{ZeroOrMore} and L{OneOrMore} classes - - use L{'+'}, L{'|'}, L{'^'}, and L{'&'} operators to combine simple expressions into more complex ones - - associate names with your parsed results using L{ParserElement.setResultsName} - - find some helpful expression short-cuts like L{delimitedList} and L{oneOf} - - find more useful common expressions in the L{pyparsing_common} namespace class -""" - -__version__ = "2.2.1" -__versionTime__ = "18 Sep 2018 00:49 UTC" -__author__ = "Paul McGuire " - -import string -from weakref import ref as wkref -import copy -import sys -import warnings -import re -import sre_constants -import collections -import pprint -import traceback -import types -from datetime import datetime - -try: - from _thread import RLock -except ImportError: - from threading import RLock - -try: - # Python 3 - from collections.abc import Iterable - from collections.abc import MutableMapping -except ImportError: - # Python 2.7 - from collections import Iterable - from collections import MutableMapping - -try: - from collections import OrderedDict as _OrderedDict -except ImportError: - try: - from ordereddict import OrderedDict as _OrderedDict - except ImportError: - _OrderedDict = None - -#~ sys.stderr.write( "testing pyparsing module, version %s, %s\n" % (__version__,__versionTime__ ) ) - -__all__ = [ -'And', 'CaselessKeyword', 'CaselessLiteral', 'CharsNotIn', 'Combine', 'Dict', 'Each', 'Empty', -'FollowedBy', 'Forward', 'GoToColumn', 'Group', 'Keyword', 'LineEnd', 'LineStart', 'Literal', -'MatchFirst', 'NoMatch', 'NotAny', 'OneOrMore', 'OnlyOnce', 'Optional', 'Or', -'ParseBaseException', 'ParseElementEnhance', 'ParseException', 'ParseExpression', 'ParseFatalException', -'ParseResults', 'ParseSyntaxException', 'ParserElement', 'QuotedString', 'RecursiveGrammarException', -'Regex', 'SkipTo', 'StringEnd', 'StringStart', 'Suppress', 'Token', 'TokenConverter', -'White', 'Word', 'WordEnd', 'WordStart', 'ZeroOrMore', -'alphanums', 'alphas', 'alphas8bit', 'anyCloseTag', 'anyOpenTag', 'cStyleComment', 'col', -'commaSeparatedList', 'commonHTMLEntity', 'countedArray', 'cppStyleComment', 'dblQuotedString', -'dblSlashComment', 'delimitedList', 'dictOf', 'downcaseTokens', 'empty', 'hexnums', -'htmlComment', 'javaStyleComment', 'line', 'lineEnd', 'lineStart', 'lineno', -'makeHTMLTags', 'makeXMLTags', 'matchOnlyAtCol', 'matchPreviousExpr', 'matchPreviousLiteral', -'nestedExpr', 'nullDebugAction', 'nums', 'oneOf', 'opAssoc', 'operatorPrecedence', 'printables', -'punc8bit', 'pythonStyleComment', 'quotedString', 'removeQuotes', 'replaceHTMLEntity', -'replaceWith', 'restOfLine', 'sglQuotedString', 'srange', 'stringEnd', -'stringStart', 'traceParseAction', 'unicodeString', 'upcaseTokens', 'withAttribute', -'indentedBlock', 'originalTextFor', 'ungroup', 'infixNotation','locatedExpr', 'withClass', -'CloseMatch', 'tokenMap', 'pyparsing_common', -] - -system_version = tuple(sys.version_info)[:3] -PY_3 = system_version[0] == 3 -if PY_3: - _MAX_INT = sys.maxsize - basestring = str - unichr = chr - _ustr = str - - # build list of single arg builtins, that can be used as parse actions - singleArgBuiltins = [sum, len, sorted, reversed, list, tuple, set, any, all, min, max] - -else: - _MAX_INT = sys.maxint - range = xrange - - def _ustr(obj): - """Drop-in replacement for str(obj) that tries to be Unicode friendly. It first tries - str(obj). If that fails with a UnicodeEncodeError, then it tries unicode(obj). It - then < returns the unicode object | encodes it with the default encoding | ... >. - """ - if isinstance(obj,unicode): - return obj - - try: - # If this works, then _ustr(obj) has the same behaviour as str(obj), so - # it won't break any existing code. - return str(obj) - - except UnicodeEncodeError: - # Else encode it - ret = unicode(obj).encode(sys.getdefaultencoding(), 'xmlcharrefreplace') - xmlcharref = Regex(r'&#\d+;') - xmlcharref.setParseAction(lambda t: '\\u' + hex(int(t[0][2:-1]))[2:]) - return xmlcharref.transformString(ret) - - # build list of single arg builtins, tolerant of Python version, that can be used as parse actions - singleArgBuiltins = [] - import __builtin__ - for fname in "sum len sorted reversed list tuple set any all min max".split(): - try: - singleArgBuiltins.append(getattr(__builtin__,fname)) - except AttributeError: - continue - -_generatorType = type((y for y in range(1))) - -def _xml_escape(data): - """Escape &, <, >, ", ', etc. in a string of data.""" - - # ampersand must be replaced first - from_symbols = '&><"\'' - to_symbols = ('&'+s+';' for s in "amp gt lt quot apos".split()) - for from_,to_ in zip(from_symbols, to_symbols): - data = data.replace(from_, to_) - return data - -class _Constants(object): - pass - -alphas = string.ascii_uppercase + string.ascii_lowercase -nums = "0123456789" -hexnums = nums + "ABCDEFabcdef" -alphanums = alphas + nums -_bslash = chr(92) -printables = "".join(c for c in string.printable if c not in string.whitespace) - -class ParseBaseException(Exception): - """base exception class for all parsing runtime exceptions""" - # Performance tuning: we construct a *lot* of these, so keep this - # constructor as small and fast as possible - def __init__( self, pstr, loc=0, msg=None, elem=None ): - self.loc = loc - if msg is None: - self.msg = pstr - self.pstr = "" - else: - self.msg = msg - self.pstr = pstr - self.parserElement = elem - self.args = (pstr, loc, msg) - - @classmethod - def _from_exception(cls, pe): - """ - internal factory method to simplify creating one type of ParseException - from another - avoids having __init__ signature conflicts among subclasses - """ - return cls(pe.pstr, pe.loc, pe.msg, pe.parserElement) - - def __getattr__( self, aname ): - """supported attributes by name are: - - lineno - returns the line number of the exception text - - col - returns the column number of the exception text - - line - returns the line containing the exception text - """ - if( aname == "lineno" ): - return lineno( self.loc, self.pstr ) - elif( aname in ("col", "column") ): - return col( self.loc, self.pstr ) - elif( aname == "line" ): - return line( self.loc, self.pstr ) - else: - raise AttributeError(aname) - - def __str__( self ): - return "%s (at char %d), (line:%d, col:%d)" % \ - ( self.msg, self.loc, self.lineno, self.column ) - def __repr__( self ): - return _ustr(self) - def markInputline( self, markerString = ">!<" ): - """Extracts the exception line from the input string, and marks - the location of the exception with a special symbol. - """ - line_str = self.line - line_column = self.column - 1 - if markerString: - line_str = "".join((line_str[:line_column], - markerString, line_str[line_column:])) - return line_str.strip() - def __dir__(self): - return "lineno col line".split() + dir(type(self)) - -class ParseException(ParseBaseException): - """ - Exception thrown when parse expressions don't match class; - supported attributes by name are: - - lineno - returns the line number of the exception text - - col - returns the column number of the exception text - - line - returns the line containing the exception text - - Example:: - try: - Word(nums).setName("integer").parseString("ABC") - except ParseException as pe: - print(pe) - print("column: {}".format(pe.col)) - - prints:: - Expected integer (at char 0), (line:1, col:1) - column: 1 - """ - pass - -class ParseFatalException(ParseBaseException): - """user-throwable exception thrown when inconsistent parse content - is found; stops all parsing immediately""" - pass - -class ParseSyntaxException(ParseFatalException): - """just like L{ParseFatalException}, but thrown internally when an - L{ErrorStop} ('-' operator) indicates that parsing is to stop - immediately because an unbacktrackable syntax error has been found""" - pass - -#~ class ReparseException(ParseBaseException): - #~ """Experimental class - parse actions can raise this exception to cause - #~ pyparsing to reparse the input string: - #~ - with a modified input string, and/or - #~ - with a modified start location - #~ Set the values of the ReparseException in the constructor, and raise the - #~ exception in a parse action to cause pyparsing to use the new string/location. - #~ Setting the values as None causes no change to be made. - #~ """ - #~ def __init_( self, newstring, restartLoc ): - #~ self.newParseText = newstring - #~ self.reparseLoc = restartLoc - -class RecursiveGrammarException(Exception): - """exception thrown by L{ParserElement.validate} if the grammar could be improperly recursive""" - def __init__( self, parseElementList ): - self.parseElementTrace = parseElementList - - def __str__( self ): - return "RecursiveGrammarException: %s" % self.parseElementTrace - -class _ParseResultsWithOffset(object): - def __init__(self,p1,p2): - self.tup = (p1,p2) - def __getitem__(self,i): - return self.tup[i] - def __repr__(self): - return repr(self.tup[0]) - def setOffset(self,i): - self.tup = (self.tup[0],i) - -class ParseResults(object): - """ - Structured parse results, to provide multiple means of access to the parsed data: - - as a list (C{len(results)}) - - by list index (C{results[0], results[1]}, etc.) - - by attribute (C{results.} - see L{ParserElement.setResultsName}) - - Example:: - integer = Word(nums) - date_str = (integer.setResultsName("year") + '/' - + integer.setResultsName("month") + '/' - + integer.setResultsName("day")) - # equivalent form: - # date_str = integer("year") + '/' + integer("month") + '/' + integer("day") - - # parseString returns a ParseResults object - result = date_str.parseString("1999/12/31") - - def test(s, fn=repr): - print("%s -> %s" % (s, fn(eval(s)))) - test("list(result)") - test("result[0]") - test("result['month']") - test("result.day") - test("'month' in result") - test("'minutes' in result") - test("result.dump()", str) - prints:: - list(result) -> ['1999', '/', '12', '/', '31'] - result[0] -> '1999' - result['month'] -> '12' - result.day -> '31' - 'month' in result -> True - 'minutes' in result -> False - result.dump() -> ['1999', '/', '12', '/', '31'] - - day: 31 - - month: 12 - - year: 1999 - """ - def __new__(cls, toklist=None, name=None, asList=True, modal=True ): - if isinstance(toklist, cls): - return toklist - retobj = object.__new__(cls) - retobj.__doinit = True - return retobj - - # Performance tuning: we construct a *lot* of these, so keep this - # constructor as small and fast as possible - def __init__( self, toklist=None, name=None, asList=True, modal=True, isinstance=isinstance ): - if self.__doinit: - self.__doinit = False - self.__name = None - self.__parent = None - self.__accumNames = {} - self.__asList = asList - self.__modal = modal - if toklist is None: - toklist = [] - if isinstance(toklist, list): - self.__toklist = toklist[:] - elif isinstance(toklist, _generatorType): - self.__toklist = list(toklist) - else: - self.__toklist = [toklist] - self.__tokdict = dict() - - if name is not None and name: - if not modal: - self.__accumNames[name] = 0 - if isinstance(name,int): - name = _ustr(name) # will always return a str, but use _ustr for consistency - self.__name = name - if not (isinstance(toklist, (type(None), basestring, list)) and toklist in (None,'',[])): - if isinstance(toklist,basestring): - toklist = [ toklist ] - if asList: - if isinstance(toklist,ParseResults): - self[name] = _ParseResultsWithOffset(toklist.copy(),0) - else: - self[name] = _ParseResultsWithOffset(ParseResults(toklist[0]),0) - self[name].__name = name - else: - try: - self[name] = toklist[0] - except (KeyError,TypeError,IndexError): - self[name] = toklist - - def __getitem__( self, i ): - if isinstance( i, (int,slice) ): - return self.__toklist[i] - else: - if i not in self.__accumNames: - return self.__tokdict[i][-1][0] - else: - return ParseResults([ v[0] for v in self.__tokdict[i] ]) - - def __setitem__( self, k, v, isinstance=isinstance ): - if isinstance(v,_ParseResultsWithOffset): - self.__tokdict[k] = self.__tokdict.get(k,list()) + [v] - sub = v[0] - elif isinstance(k,(int,slice)): - self.__toklist[k] = v - sub = v - else: - self.__tokdict[k] = self.__tokdict.get(k,list()) + [_ParseResultsWithOffset(v,0)] - sub = v - if isinstance(sub,ParseResults): - sub.__parent = wkref(self) - - def __delitem__( self, i ): - if isinstance(i,(int,slice)): - mylen = len( self.__toklist ) - del self.__toklist[i] - - # convert int to slice - if isinstance(i, int): - if i < 0: - i += mylen - i = slice(i, i+1) - # get removed indices - removed = list(range(*i.indices(mylen))) - removed.reverse() - # fixup indices in token dictionary - for name,occurrences in self.__tokdict.items(): - for j in removed: - for k, (value, position) in enumerate(occurrences): - occurrences[k] = _ParseResultsWithOffset(value, position - (position > j)) - else: - del self.__tokdict[i] - - def __contains__( self, k ): - return k in self.__tokdict - - def __len__( self ): return len( self.__toklist ) - def __bool__(self): return ( not not self.__toklist ) - __nonzero__ = __bool__ - def __iter__( self ): return iter( self.__toklist ) - def __reversed__( self ): return iter( self.__toklist[::-1] ) - def _iterkeys( self ): - if hasattr(self.__tokdict, "iterkeys"): - return self.__tokdict.iterkeys() - else: - return iter(self.__tokdict) - - def _itervalues( self ): - return (self[k] for k in self._iterkeys()) - - def _iteritems( self ): - return ((k, self[k]) for k in self._iterkeys()) - - if PY_3: - keys = _iterkeys - """Returns an iterator of all named result keys (Python 3.x only).""" - - values = _itervalues - """Returns an iterator of all named result values (Python 3.x only).""" - - items = _iteritems - """Returns an iterator of all named result key-value tuples (Python 3.x only).""" - - else: - iterkeys = _iterkeys - """Returns an iterator of all named result keys (Python 2.x only).""" - - itervalues = _itervalues - """Returns an iterator of all named result values (Python 2.x only).""" - - iteritems = _iteritems - """Returns an iterator of all named result key-value tuples (Python 2.x only).""" - - def keys( self ): - """Returns all named result keys (as a list in Python 2.x, as an iterator in Python 3.x).""" - return list(self.iterkeys()) - - def values( self ): - """Returns all named result values (as a list in Python 2.x, as an iterator in Python 3.x).""" - return list(self.itervalues()) - - def items( self ): - """Returns all named result key-values (as a list of tuples in Python 2.x, as an iterator in Python 3.x).""" - return list(self.iteritems()) - - def haskeys( self ): - """Since keys() returns an iterator, this method is helpful in bypassing - code that looks for the existence of any defined results names.""" - return bool(self.__tokdict) - - def pop( self, *args, **kwargs): - """ - Removes and returns item at specified index (default=C{last}). - Supports both C{list} and C{dict} semantics for C{pop()}. If passed no - argument or an integer argument, it will use C{list} semantics - and pop tokens from the list of parsed tokens. If passed a - non-integer argument (most likely a string), it will use C{dict} - semantics and pop the corresponding value from any defined - results names. A second default return value argument is - supported, just as in C{dict.pop()}. - - Example:: - def remove_first(tokens): - tokens.pop(0) - print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321'] - print(OneOrMore(Word(nums)).addParseAction(remove_first).parseString("0 123 321")) # -> ['123', '321'] - - label = Word(alphas) - patt = label("LABEL") + OneOrMore(Word(nums)) - print(patt.parseString("AAB 123 321").dump()) - - # Use pop() in a parse action to remove named result (note that corresponding value is not - # removed from list form of results) - def remove_LABEL(tokens): - tokens.pop("LABEL") - return tokens - patt.addParseAction(remove_LABEL) - print(patt.parseString("AAB 123 321").dump()) - prints:: - ['AAB', '123', '321'] - - LABEL: AAB - - ['AAB', '123', '321'] - """ - if not args: - args = [-1] - for k,v in kwargs.items(): - if k == 'default': - args = (args[0], v) - else: - raise TypeError("pop() got an unexpected keyword argument '%s'" % k) - if (isinstance(args[0], int) or - len(args) == 1 or - args[0] in self): - index = args[0] - ret = self[index] - del self[index] - return ret - else: - defaultvalue = args[1] - return defaultvalue - - def get(self, key, defaultValue=None): - """ - Returns named result matching the given key, or if there is no - such name, then returns the given C{defaultValue} or C{None} if no - C{defaultValue} is specified. - - Similar to C{dict.get()}. - - Example:: - integer = Word(nums) - date_str = integer("year") + '/' + integer("month") + '/' + integer("day") - - result = date_str.parseString("1999/12/31") - print(result.get("year")) # -> '1999' - print(result.get("hour", "not specified")) # -> 'not specified' - print(result.get("hour")) # -> None - """ - if key in self: - return self[key] - else: - return defaultValue - - def insert( self, index, insStr ): - """ - Inserts new element at location index in the list of parsed tokens. - - Similar to C{list.insert()}. - - Example:: - print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321'] - - # use a parse action to insert the parse location in the front of the parsed results - def insert_locn(locn, tokens): - tokens.insert(0, locn) - print(OneOrMore(Word(nums)).addParseAction(insert_locn).parseString("0 123 321")) # -> [0, '0', '123', '321'] - """ - self.__toklist.insert(index, insStr) - # fixup indices in token dictionary - for name,occurrences in self.__tokdict.items(): - for k, (value, position) in enumerate(occurrences): - occurrences[k] = _ParseResultsWithOffset(value, position + (position > index)) - - def append( self, item ): - """ - Add single element to end of ParseResults list of elements. - - Example:: - print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321'] - - # use a parse action to compute the sum of the parsed integers, and add it to the end - def append_sum(tokens): - tokens.append(sum(map(int, tokens))) - print(OneOrMore(Word(nums)).addParseAction(append_sum).parseString("0 123 321")) # -> ['0', '123', '321', 444] - """ - self.__toklist.append(item) - - def extend( self, itemseq ): - """ - Add sequence of elements to end of ParseResults list of elements. - - Example:: - patt = OneOrMore(Word(alphas)) - - # use a parse action to append the reverse of the matched strings, to make a palindrome - def make_palindrome(tokens): - tokens.extend(reversed([t[::-1] for t in tokens])) - return ''.join(tokens) - print(patt.addParseAction(make_palindrome).parseString("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl' - """ - if isinstance(itemseq, ParseResults): - self += itemseq - else: - self.__toklist.extend(itemseq) - - def clear( self ): - """ - Clear all elements and results names. - """ - del self.__toklist[:] - self.__tokdict.clear() - - def __getattr__( self, name ): - try: - return self[name] - except KeyError: - return "" - - if name in self.__tokdict: - if name not in self.__accumNames: - return self.__tokdict[name][-1][0] - else: - return ParseResults([ v[0] for v in self.__tokdict[name] ]) - else: - return "" - - def __add__( self, other ): - ret = self.copy() - ret += other - return ret - - def __iadd__( self, other ): - if other.__tokdict: - offset = len(self.__toklist) - addoffset = lambda a: offset if a<0 else a+offset - otheritems = other.__tokdict.items() - otherdictitems = [(k, _ParseResultsWithOffset(v[0],addoffset(v[1])) ) - for (k,vlist) in otheritems for v in vlist] - for k,v in otherdictitems: - self[k] = v - if isinstance(v[0],ParseResults): - v[0].__parent = wkref(self) - - self.__toklist += other.__toklist - self.__accumNames.update( other.__accumNames ) - return self - - def __radd__(self, other): - if isinstance(other,int) and other == 0: - # useful for merging many ParseResults using sum() builtin - return self.copy() - else: - # this may raise a TypeError - so be it - return other + self - - def __repr__( self ): - return "(%s, %s)" % ( repr( self.__toklist ), repr( self.__tokdict ) ) - - def __str__( self ): - return '[' + ', '.join(_ustr(i) if isinstance(i, ParseResults) else repr(i) for i in self.__toklist) + ']' - - def _asStringList( self, sep='' ): - out = [] - for item in self.__toklist: - if out and sep: - out.append(sep) - if isinstance( item, ParseResults ): - out += item._asStringList() - else: - out.append( _ustr(item) ) - return out - - def asList( self ): - """ - Returns the parse results as a nested list of matching tokens, all converted to strings. - - Example:: - patt = OneOrMore(Word(alphas)) - result = patt.parseString("sldkj lsdkj sldkj") - # even though the result prints in string-like form, it is actually a pyparsing ParseResults - print(type(result), result) # -> ['sldkj', 'lsdkj', 'sldkj'] - - # Use asList() to create an actual list - result_list = result.asList() - print(type(result_list), result_list) # -> ['sldkj', 'lsdkj', 'sldkj'] - """ - return [res.asList() if isinstance(res,ParseResults) else res for res in self.__toklist] - - def asDict( self ): - """ - Returns the named parse results as a nested dictionary. - - Example:: - integer = Word(nums) - date_str = integer("year") + '/' + integer("month") + '/' + integer("day") - - result = date_str.parseString('12/31/1999') - print(type(result), repr(result)) # -> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]}) - - result_dict = result.asDict() - print(type(result_dict), repr(result_dict)) # -> {'day': '1999', 'year': '12', 'month': '31'} - - # even though a ParseResults supports dict-like access, sometime you just need to have a dict - import json - print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable - print(json.dumps(result.asDict())) # -> {"month": "31", "day": "1999", "year": "12"} - """ - if PY_3: - item_fn = self.items - else: - item_fn = self.iteritems - - def toItem(obj): - if isinstance(obj, ParseResults): - if obj.haskeys(): - return obj.asDict() - else: - return [toItem(v) for v in obj] - else: - return obj - - return dict((k,toItem(v)) for k,v in item_fn()) - - def copy( self ): - """ - Returns a new copy of a C{ParseResults} object. - """ - ret = ParseResults( self.__toklist ) - ret.__tokdict = self.__tokdict.copy() - ret.__parent = self.__parent - ret.__accumNames.update( self.__accumNames ) - ret.__name = self.__name - return ret - - def asXML( self, doctag=None, namedItemsOnly=False, indent="", formatted=True ): - """ - (Deprecated) Returns the parse results as XML. Tags are created for tokens and lists that have defined results names. - """ - nl = "\n" - out = [] - namedItems = dict((v[1],k) for (k,vlist) in self.__tokdict.items() - for v in vlist) - nextLevelIndent = indent + " " - - # collapse out indents if formatting is not desired - if not formatted: - indent = "" - nextLevelIndent = "" - nl = "" - - selfTag = None - if doctag is not None: - selfTag = doctag - else: - if self.__name: - selfTag = self.__name - - if not selfTag: - if namedItemsOnly: - return "" - else: - selfTag = "ITEM" - - out += [ nl, indent, "<", selfTag, ">" ] - - for i,res in enumerate(self.__toklist): - if isinstance(res,ParseResults): - if i in namedItems: - out += [ res.asXML(namedItems[i], - namedItemsOnly and doctag is None, - nextLevelIndent, - formatted)] - else: - out += [ res.asXML(None, - namedItemsOnly and doctag is None, - nextLevelIndent, - formatted)] - else: - # individual token, see if there is a name for it - resTag = None - if i in namedItems: - resTag = namedItems[i] - if not resTag: - if namedItemsOnly: - continue - else: - resTag = "ITEM" - xmlBodyText = _xml_escape(_ustr(res)) - out += [ nl, nextLevelIndent, "<", resTag, ">", - xmlBodyText, - "" ] - - out += [ nl, indent, "" ] - return "".join(out) - - def __lookup(self,sub): - for k,vlist in self.__tokdict.items(): - for v,loc in vlist: - if sub is v: - return k - return None - - def getName(self): - r""" - Returns the results name for this token expression. Useful when several - different expressions might match at a particular location. - - Example:: - integer = Word(nums) - ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d") - house_number_expr = Suppress('#') + Word(nums, alphanums) - user_data = (Group(house_number_expr)("house_number") - | Group(ssn_expr)("ssn") - | Group(integer)("age")) - user_info = OneOrMore(user_data) - - result = user_info.parseString("22 111-22-3333 #221B") - for item in result: - print(item.getName(), ':', item[0]) - prints:: - age : 22 - ssn : 111-22-3333 - house_number : 221B - """ - if self.__name: - return self.__name - elif self.__parent: - par = self.__parent() - if par: - return par.__lookup(self) - else: - return None - elif (len(self) == 1 and - len(self.__tokdict) == 1 and - next(iter(self.__tokdict.values()))[0][1] in (0,-1)): - return next(iter(self.__tokdict.keys())) - else: - return None - - def dump(self, indent='', depth=0, full=True): - """ - Diagnostic method for listing out the contents of a C{ParseResults}. - Accepts an optional C{indent} argument so that this string can be embedded - in a nested display of other data. - - Example:: - integer = Word(nums) - date_str = integer("year") + '/' + integer("month") + '/' + integer("day") - - result = date_str.parseString('12/31/1999') - print(result.dump()) - prints:: - ['12', '/', '31', '/', '1999'] - - day: 1999 - - month: 31 - - year: 12 - """ - out = [] - NL = '\n' - out.append( indent+_ustr(self.asList()) ) - if full: - if self.haskeys(): - items = sorted((str(k), v) for k,v in self.items()) - for k,v in items: - if out: - out.append(NL) - out.append( "%s%s- %s: " % (indent,(' '*depth), k) ) - if isinstance(v,ParseResults): - if v: - out.append( v.dump(indent,depth+1) ) - else: - out.append(_ustr(v)) - else: - out.append(repr(v)) - elif any(isinstance(vv,ParseResults) for vv in self): - v = self - for i,vv in enumerate(v): - if isinstance(vv,ParseResults): - out.append("\n%s%s[%d]:\n%s%s%s" % (indent,(' '*(depth)),i,indent,(' '*(depth+1)),vv.dump(indent,depth+1) )) - else: - out.append("\n%s%s[%d]:\n%s%s%s" % (indent,(' '*(depth)),i,indent,(' '*(depth+1)),_ustr(vv))) - - return "".join(out) - - def pprint(self, *args, **kwargs): - """ - Pretty-printer for parsed results as a list, using the C{pprint} module. - Accepts additional positional or keyword args as defined for the - C{pprint.pprint} method. (U{http://docs.python.org/3/library/pprint.html#pprint.pprint}) - - Example:: - ident = Word(alphas, alphanums) - num = Word(nums) - func = Forward() - term = ident | num | Group('(' + func + ')') - func <<= ident + Group(Optional(delimitedList(term))) - result = func.parseString("fna a,b,(fnb c,d,200),100") - result.pprint(width=40) - prints:: - ['fna', - ['a', - 'b', - ['(', 'fnb', ['c', 'd', '200'], ')'], - '100']] - """ - pprint.pprint(self.asList(), *args, **kwargs) - - # add support for pickle protocol - def __getstate__(self): - return ( self.__toklist, - ( self.__tokdict.copy(), - self.__parent is not None and self.__parent() or None, - self.__accumNames, - self.__name ) ) - - def __setstate__(self,state): - self.__toklist = state[0] - (self.__tokdict, - par, - inAccumNames, - self.__name) = state[1] - self.__accumNames = {} - self.__accumNames.update(inAccumNames) - if par is not None: - self.__parent = wkref(par) - else: - self.__parent = None - - def __getnewargs__(self): - return self.__toklist, self.__name, self.__asList, self.__modal - - def __dir__(self): - return (dir(type(self)) + list(self.keys())) - -MutableMapping.register(ParseResults) - -def col (loc,strg): - """Returns current column within a string, counting newlines as line separators. - The first column is number 1. - - Note: the default parsing behavior is to expand tabs in the input string - before starting the parsing process. See L{I{ParserElement.parseString}} for more information - on parsing strings containing C{}s, and suggested methods to maintain a - consistent view of the parsed string, the parse location, and line and column - positions within the parsed string. - """ - s = strg - return 1 if 0} for more information - on parsing strings containing C{}s, and suggested methods to maintain a - consistent view of the parsed string, the parse location, and line and column - positions within the parsed string. - """ - return strg.count("\n",0,loc) + 1 - -def line( loc, strg ): - """Returns the line of text containing loc within a string, counting newlines as line separators. - """ - lastCR = strg.rfind("\n", 0, loc) - nextCR = strg.find("\n", loc) - if nextCR >= 0: - return strg[lastCR+1:nextCR] - else: - return strg[lastCR+1:] - -def _defaultStartDebugAction( instring, loc, expr ): - print (("Match " + _ustr(expr) + " at loc " + _ustr(loc) + "(%d,%d)" % ( lineno(loc,instring), col(loc,instring) ))) - -def _defaultSuccessDebugAction( instring, startloc, endloc, expr, toks ): - print ("Matched " + _ustr(expr) + " -> " + str(toks.asList())) - -def _defaultExceptionDebugAction( instring, loc, expr, exc ): - print ("Exception raised:" + _ustr(exc)) - -def nullDebugAction(*args): - """'Do-nothing' debug action, to suppress debugging output during parsing.""" - pass - -# Only works on Python 3.x - nonlocal is toxic to Python 2 installs -#~ 'decorator to trim function calls to match the arity of the target' -#~ def _trim_arity(func, maxargs=3): - #~ if func in singleArgBuiltins: - #~ return lambda s,l,t: func(t) - #~ limit = 0 - #~ foundArity = False - #~ def wrapper(*args): - #~ nonlocal limit,foundArity - #~ while 1: - #~ try: - #~ ret = func(*args[limit:]) - #~ foundArity = True - #~ return ret - #~ except TypeError: - #~ if limit == maxargs or foundArity: - #~ raise - #~ limit += 1 - #~ continue - #~ return wrapper - -# this version is Python 2.x-3.x cross-compatible -'decorator to trim function calls to match the arity of the target' -def _trim_arity(func, maxargs=2): - if func in singleArgBuiltins: - return lambda s,l,t: func(t) - limit = [0] - foundArity = [False] - - # traceback return data structure changed in Py3.5 - normalize back to plain tuples - if system_version[:2] >= (3,5): - def extract_stack(limit=0): - # special handling for Python 3.5.0 - extra deep call stack by 1 - offset = -3 if system_version == (3,5,0) else -2 - frame_summary = traceback.extract_stack(limit=-offset+limit-1)[offset] - return [frame_summary[:2]] - def extract_tb(tb, limit=0): - frames = traceback.extract_tb(tb, limit=limit) - frame_summary = frames[-1] - return [frame_summary[:2]] - else: - extract_stack = traceback.extract_stack - extract_tb = traceback.extract_tb - - # synthesize what would be returned by traceback.extract_stack at the call to - # user's parse action 'func', so that we don't incur call penalty at parse time - - LINE_DIFF = 6 - # IF ANY CODE CHANGES, EVEN JUST COMMENTS OR BLANK LINES, BETWEEN THE NEXT LINE AND - # THE CALL TO FUNC INSIDE WRAPPER, LINE_DIFF MUST BE MODIFIED!!!! - this_line = extract_stack(limit=2)[-1] - pa_call_line_synth = (this_line[0], this_line[1]+LINE_DIFF) - - def wrapper(*args): - while 1: - try: - ret = func(*args[limit[0]:]) - foundArity[0] = True - return ret - except TypeError: - # re-raise TypeErrors if they did not come from our arity testing - if foundArity[0]: - raise - else: - try: - tb = sys.exc_info()[-1] - if not extract_tb(tb, limit=2)[-1][:2] == pa_call_line_synth: - raise - finally: - del tb - - if limit[0] <= maxargs: - limit[0] += 1 - continue - raise - - # copy func name to wrapper for sensible debug output - func_name = "" - try: - func_name = getattr(func, '__name__', - getattr(func, '__class__').__name__) - except Exception: - func_name = str(func) - wrapper.__name__ = func_name - - return wrapper - -class ParserElement(object): - """Abstract base level parser element class.""" - DEFAULT_WHITE_CHARS = " \n\t\r" - verbose_stacktrace = False - - @staticmethod - def setDefaultWhitespaceChars( chars ): - r""" - Overrides the default whitespace chars - - Example:: - # default whitespace chars are space, and newline - OneOrMore(Word(alphas)).parseString("abc def\nghi jkl") # -> ['abc', 'def', 'ghi', 'jkl'] - - # change to just treat newline as significant - ParserElement.setDefaultWhitespaceChars(" \t") - OneOrMore(Word(alphas)).parseString("abc def\nghi jkl") # -> ['abc', 'def'] - """ - ParserElement.DEFAULT_WHITE_CHARS = chars - - @staticmethod - def inlineLiteralsUsing(cls): - """ - Set class to be used for inclusion of string literals into a parser. - - Example:: - # default literal class used is Literal - integer = Word(nums) - date_str = integer("year") + '/' + integer("month") + '/' + integer("day") - - date_str.parseString("1999/12/31") # -> ['1999', '/', '12', '/', '31'] - - - # change to Suppress - ParserElement.inlineLiteralsUsing(Suppress) - date_str = integer("year") + '/' + integer("month") + '/' + integer("day") - - date_str.parseString("1999/12/31") # -> ['1999', '12', '31'] - """ - ParserElement._literalStringClass = cls - - def __init__( self, savelist=False ): - self.parseAction = list() - self.failAction = None - #~ self.name = "" # don't define self.name, let subclasses try/except upcall - self.strRepr = None - self.resultsName = None - self.saveAsList = savelist - self.skipWhitespace = True - self.whiteChars = ParserElement.DEFAULT_WHITE_CHARS - self.copyDefaultWhiteChars = True - self.mayReturnEmpty = False # used when checking for left-recursion - self.keepTabs = False - self.ignoreExprs = list() - self.debug = False - self.streamlined = False - self.mayIndexError = True # used to optimize exception handling for subclasses that don't advance parse index - self.errmsg = "" - self.modalResults = True # used to mark results names as modal (report only last) or cumulative (list all) - self.debugActions = ( None, None, None ) #custom debug actions - self.re = None - self.callPreparse = True # used to avoid redundant calls to preParse - self.callDuringTry = False - - def copy( self ): - """ - Make a copy of this C{ParserElement}. Useful for defining different parse actions - for the same parsing pattern, using copies of the original parse element. - - Example:: - integer = Word(nums).setParseAction(lambda toks: int(toks[0])) - integerK = integer.copy().addParseAction(lambda toks: toks[0]*1024) + Suppress("K") - integerM = integer.copy().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M") - - print(OneOrMore(integerK | integerM | integer).parseString("5K 100 640K 256M")) - prints:: - [5120, 100, 655360, 268435456] - Equivalent form of C{expr.copy()} is just C{expr()}:: - integerM = integer().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M") - """ - cpy = copy.copy( self ) - cpy.parseAction = self.parseAction[:] - cpy.ignoreExprs = self.ignoreExprs[:] - if self.copyDefaultWhiteChars: - cpy.whiteChars = ParserElement.DEFAULT_WHITE_CHARS - return cpy - - def setName( self, name ): - """ - Define name for this expression, makes debugging and exception messages clearer. - - Example:: - Word(nums).parseString("ABC") # -> Exception: Expected W:(0123...) (at char 0), (line:1, col:1) - Word(nums).setName("integer").parseString("ABC") # -> Exception: Expected integer (at char 0), (line:1, col:1) - """ - self.name = name - self.errmsg = "Expected " + self.name - if hasattr(self,"exception"): - self.exception.msg = self.errmsg - return self - - def setResultsName( self, name, listAllMatches=False ): - """ - Define name for referencing matching tokens as a nested attribute - of the returned parse results. - NOTE: this returns a *copy* of the original C{ParserElement} object; - this is so that the client can define a basic element, such as an - integer, and reference it in multiple places with different names. - - You can also set results names using the abbreviated syntax, - C{expr("name")} in place of C{expr.setResultsName("name")} - - see L{I{__call__}<__call__>}. - - Example:: - date_str = (integer.setResultsName("year") + '/' - + integer.setResultsName("month") + '/' - + integer.setResultsName("day")) - - # equivalent form: - date_str = integer("year") + '/' + integer("month") + '/' + integer("day") - """ - newself = self.copy() - if name.endswith("*"): - name = name[:-1] - listAllMatches=True - newself.resultsName = name - newself.modalResults = not listAllMatches - return newself - - def setBreak(self,breakFlag = True): - """Method to invoke the Python pdb debugger when this element is - about to be parsed. Set C{breakFlag} to True to enable, False to - disable. - """ - if breakFlag: - _parseMethod = self._parse - def breaker(instring, loc, doActions=True, callPreParse=True): - import pdb - pdb.set_trace() - return _parseMethod( instring, loc, doActions, callPreParse ) - breaker._originalParseMethod = _parseMethod - self._parse = breaker - else: - if hasattr(self._parse,"_originalParseMethod"): - self._parse = self._parse._originalParseMethod - return self - - def setParseAction( self, *fns, **kwargs ): - """ - Define one or more actions to perform when successfully matching parse element definition. - Parse action fn is a callable method with 0-3 arguments, called as C{fn(s,loc,toks)}, - C{fn(loc,toks)}, C{fn(toks)}, or just C{fn()}, where: - - s = the original string being parsed (see note below) - - loc = the location of the matching substring - - toks = a list of the matched tokens, packaged as a C{L{ParseResults}} object - If the functions in fns modify the tokens, they can return them as the return - value from fn, and the modified list of tokens will replace the original. - Otherwise, fn does not need to return any value. - - Optional keyword arguments: - - callDuringTry = (default=C{False}) indicate if parse action should be run during lookaheads and alternate testing - - Note: the default parsing behavior is to expand tabs in the input string - before starting the parsing process. See L{I{parseString}} for more information - on parsing strings containing C{}s, and suggested methods to maintain a - consistent view of the parsed string, the parse location, and line and column - positions within the parsed string. - - Example:: - integer = Word(nums) - date_str = integer + '/' + integer + '/' + integer - - date_str.parseString("1999/12/31") # -> ['1999', '/', '12', '/', '31'] - - # use parse action to convert to ints at parse time - integer = Word(nums).setParseAction(lambda toks: int(toks[0])) - date_str = integer + '/' + integer + '/' + integer - - # note that integer fields are now ints, not strings - date_str.parseString("1999/12/31") # -> [1999, '/', 12, '/', 31] - """ - self.parseAction = list(map(_trim_arity, list(fns))) - self.callDuringTry = kwargs.get("callDuringTry", False) - return self - - def addParseAction( self, *fns, **kwargs ): - """ - Add one or more parse actions to expression's list of parse actions. See L{I{setParseAction}}. - - See examples in L{I{copy}}. - """ - self.parseAction += list(map(_trim_arity, list(fns))) - self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False) - return self - - def addCondition(self, *fns, **kwargs): - """Add a boolean predicate function to expression's list of parse actions. See - L{I{setParseAction}} for function call signatures. Unlike C{setParseAction}, - functions passed to C{addCondition} need to return boolean success/fail of the condition. - - Optional keyword arguments: - - message = define a custom message to be used in the raised exception - - fatal = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise ParseException - - Example:: - integer = Word(nums).setParseAction(lambda toks: int(toks[0])) - year_int = integer.copy() - year_int.addCondition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later") - date_str = year_int + '/' + integer + '/' + integer - - result = date_str.parseString("1999/12/31") # -> Exception: Only support years 2000 and later (at char 0), (line:1, col:1) - """ - msg = kwargs.get("message", "failed user-defined condition") - exc_type = ParseFatalException if kwargs.get("fatal", False) else ParseException - for fn in fns: - def pa(s,l,t): - if not bool(_trim_arity(fn)(s,l,t)): - raise exc_type(s,l,msg) - self.parseAction.append(pa) - self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False) - return self - - def setFailAction( self, fn ): - """Define action to perform if parsing fails at this expression. - Fail acton fn is a callable function that takes the arguments - C{fn(s,loc,expr,err)} where: - - s = string being parsed - - loc = location where expression match was attempted and failed - - expr = the parse expression that failed - - err = the exception thrown - The function returns no value. It may throw C{L{ParseFatalException}} - if it is desired to stop parsing immediately.""" - self.failAction = fn - return self - - def _skipIgnorables( self, instring, loc ): - exprsFound = True - while exprsFound: - exprsFound = False - for e in self.ignoreExprs: - try: - while 1: - loc,dummy = e._parse( instring, loc ) - exprsFound = True - except ParseException: - pass - return loc - - def preParse( self, instring, loc ): - if self.ignoreExprs: - loc = self._skipIgnorables( instring, loc ) - - if self.skipWhitespace: - wt = self.whiteChars - instrlen = len(instring) - while loc < instrlen and instring[loc] in wt: - loc += 1 - - return loc - - def parseImpl( self, instring, loc, doActions=True ): - return loc, [] - - def postParse( self, instring, loc, tokenlist ): - return tokenlist - - #~ @profile - def _parseNoCache( self, instring, loc, doActions=True, callPreParse=True ): - debugging = ( self.debug ) #and doActions ) - - if debugging or self.failAction: - #~ print ("Match",self,"at loc",loc,"(%d,%d)" % ( lineno(loc,instring), col(loc,instring) )) - if (self.debugActions[0] ): - self.debugActions[0]( instring, loc, self ) - if callPreParse and self.callPreparse: - preloc = self.preParse( instring, loc ) - else: - preloc = loc - tokensStart = preloc - try: - try: - loc,tokens = self.parseImpl( instring, preloc, doActions ) - except IndexError: - raise ParseException( instring, len(instring), self.errmsg, self ) - except ParseBaseException as err: - #~ print ("Exception raised:", err) - if self.debugActions[2]: - self.debugActions[2]( instring, tokensStart, self, err ) - if self.failAction: - self.failAction( instring, tokensStart, self, err ) - raise - else: - if callPreParse and self.callPreparse: - preloc = self.preParse( instring, loc ) - else: - preloc = loc - tokensStart = preloc - if self.mayIndexError or preloc >= len(instring): - try: - loc,tokens = self.parseImpl( instring, preloc, doActions ) - except IndexError: - raise ParseException( instring, len(instring), self.errmsg, self ) - else: - loc,tokens = self.parseImpl( instring, preloc, doActions ) - - tokens = self.postParse( instring, loc, tokens ) - - retTokens = ParseResults( tokens, self.resultsName, asList=self.saveAsList, modal=self.modalResults ) - if self.parseAction and (doActions or self.callDuringTry): - if debugging: - try: - for fn in self.parseAction: - tokens = fn( instring, tokensStart, retTokens ) - if tokens is not None: - retTokens = ParseResults( tokens, - self.resultsName, - asList=self.saveAsList and isinstance(tokens,(ParseResults,list)), - modal=self.modalResults ) - except ParseBaseException as err: - #~ print "Exception raised in user parse action:", err - if (self.debugActions[2] ): - self.debugActions[2]( instring, tokensStart, self, err ) - raise - else: - for fn in self.parseAction: - tokens = fn( instring, tokensStart, retTokens ) - if tokens is not None: - retTokens = ParseResults( tokens, - self.resultsName, - asList=self.saveAsList and isinstance(tokens,(ParseResults,list)), - modal=self.modalResults ) - if debugging: - #~ print ("Matched",self,"->",retTokens.asList()) - if (self.debugActions[1] ): - self.debugActions[1]( instring, tokensStart, loc, self, retTokens ) - - return loc, retTokens - - def tryParse( self, instring, loc ): - try: - return self._parse( instring, loc, doActions=False )[0] - except ParseFatalException: - raise ParseException( instring, loc, self.errmsg, self) - - def canParseNext(self, instring, loc): - try: - self.tryParse(instring, loc) - except (ParseException, IndexError): - return False - else: - return True - - class _UnboundedCache(object): - def __init__(self): - cache = {} - self.not_in_cache = not_in_cache = object() - - def get(self, key): - return cache.get(key, not_in_cache) - - def set(self, key, value): - cache[key] = value - - def clear(self): - cache.clear() - - def cache_len(self): - return len(cache) - - self.get = types.MethodType(get, self) - self.set = types.MethodType(set, self) - self.clear = types.MethodType(clear, self) - self.__len__ = types.MethodType(cache_len, self) - - if _OrderedDict is not None: - class _FifoCache(object): - def __init__(self, size): - self.not_in_cache = not_in_cache = object() - - cache = _OrderedDict() - - def get(self, key): - return cache.get(key, not_in_cache) - - def set(self, key, value): - cache[key] = value - while len(cache) > size: - try: - cache.popitem(False) - except KeyError: - pass - - def clear(self): - cache.clear() - - def cache_len(self): - return len(cache) - - self.get = types.MethodType(get, self) - self.set = types.MethodType(set, self) - self.clear = types.MethodType(clear, self) - self.__len__ = types.MethodType(cache_len, self) - - else: - class _FifoCache(object): - def __init__(self, size): - self.not_in_cache = not_in_cache = object() - - cache = {} - key_fifo = collections.deque([], size) - - def get(self, key): - return cache.get(key, not_in_cache) - - def set(self, key, value): - cache[key] = value - while len(key_fifo) > size: - cache.pop(key_fifo.popleft(), None) - key_fifo.append(key) - - def clear(self): - cache.clear() - key_fifo.clear() - - def cache_len(self): - return len(cache) - - self.get = types.MethodType(get, self) - self.set = types.MethodType(set, self) - self.clear = types.MethodType(clear, self) - self.__len__ = types.MethodType(cache_len, self) - - # argument cache for optimizing repeated calls when backtracking through recursive expressions - packrat_cache = {} # this is set later by enabledPackrat(); this is here so that resetCache() doesn't fail - packrat_cache_lock = RLock() - packrat_cache_stats = [0, 0] - - # this method gets repeatedly called during backtracking with the same arguments - - # we can cache these arguments and save ourselves the trouble of re-parsing the contained expression - def _parseCache( self, instring, loc, doActions=True, callPreParse=True ): - HIT, MISS = 0, 1 - lookup = (self, instring, loc, callPreParse, doActions) - with ParserElement.packrat_cache_lock: - cache = ParserElement.packrat_cache - value = cache.get(lookup) - if value is cache.not_in_cache: - ParserElement.packrat_cache_stats[MISS] += 1 - try: - value = self._parseNoCache(instring, loc, doActions, callPreParse) - except ParseBaseException as pe: - # cache a copy of the exception, without the traceback - cache.set(lookup, pe.__class__(*pe.args)) - raise - else: - cache.set(lookup, (value[0], value[1].copy())) - return value - else: - ParserElement.packrat_cache_stats[HIT] += 1 - if isinstance(value, Exception): - raise value - return (value[0], value[1].copy()) - - _parse = _parseNoCache - - @staticmethod - def resetCache(): - ParserElement.packrat_cache.clear() - ParserElement.packrat_cache_stats[:] = [0] * len(ParserElement.packrat_cache_stats) - - _packratEnabled = False - @staticmethod - def enablePackrat(cache_size_limit=128): - """Enables "packrat" parsing, which adds memoizing to the parsing logic. - Repeated parse attempts at the same string location (which happens - often in many complex grammars) can immediately return a cached value, - instead of re-executing parsing/validating code. Memoizing is done of - both valid results and parsing exceptions. - - Parameters: - - cache_size_limit - (default=C{128}) - if an integer value is provided - will limit the size of the packrat cache; if None is passed, then - the cache size will be unbounded; if 0 is passed, the cache will - be effectively disabled. - - This speedup may break existing programs that use parse actions that - have side-effects. For this reason, packrat parsing is disabled when - you first import pyparsing. To activate the packrat feature, your - program must call the class method C{ParserElement.enablePackrat()}. If - your program uses C{psyco} to "compile as you go", you must call - C{enablePackrat} before calling C{psyco.full()}. If you do not do this, - Python will crash. For best results, call C{enablePackrat()} immediately - after importing pyparsing. - - Example:: - import pyparsing - pyparsing.ParserElement.enablePackrat() - """ - if not ParserElement._packratEnabled: - ParserElement._packratEnabled = True - if cache_size_limit is None: - ParserElement.packrat_cache = ParserElement._UnboundedCache() - else: - ParserElement.packrat_cache = ParserElement._FifoCache(cache_size_limit) - ParserElement._parse = ParserElement._parseCache - - def parseString( self, instring, parseAll=False ): - """ - Execute the parse expression with the given string. - This is the main interface to the client code, once the complete - expression has been built. - - If you want the grammar to require that the entire input string be - successfully parsed, then set C{parseAll} to True (equivalent to ending - the grammar with C{L{StringEnd()}}). - - Note: C{parseString} implicitly calls C{expandtabs()} on the input string, - in order to report proper column numbers in parse actions. - If the input string contains tabs and - the grammar uses parse actions that use the C{loc} argument to index into the - string being parsed, you can ensure you have a consistent view of the input - string by: - - calling C{parseWithTabs} on your grammar before calling C{parseString} - (see L{I{parseWithTabs}}) - - define your parse action using the full C{(s,loc,toks)} signature, and - reference the input string using the parse action's C{s} argument - - explictly expand the tabs in your input string before calling - C{parseString} - - Example:: - Word('a').parseString('aaaaabaaa') # -> ['aaaaa'] - Word('a').parseString('aaaaabaaa', parseAll=True) # -> Exception: Expected end of text - """ - ParserElement.resetCache() - if not self.streamlined: - self.streamline() - #~ self.saveAsList = True - for e in self.ignoreExprs: - e.streamline() - if not self.keepTabs: - instring = instring.expandtabs() - try: - loc, tokens = self._parse( instring, 0 ) - if parseAll: - loc = self.preParse( instring, loc ) - se = Empty() + StringEnd() - se._parse( instring, loc ) - except ParseBaseException as exc: - if ParserElement.verbose_stacktrace: - raise - else: - # catch and re-raise exception from here, clears out pyparsing internal stack trace - raise exc - else: - return tokens - - def scanString( self, instring, maxMatches=_MAX_INT, overlap=False ): - """ - Scan the input string for expression matches. Each match will return the - matching tokens, start location, and end location. May be called with optional - C{maxMatches} argument, to clip scanning after 'n' matches are found. If - C{overlap} is specified, then overlapping matches will be reported. - - Note that the start and end locations are reported relative to the string - being parsed. See L{I{parseString}} for more information on parsing - strings with embedded tabs. - - Example:: - source = "sldjf123lsdjjkf345sldkjf879lkjsfd987" - print(source) - for tokens,start,end in Word(alphas).scanString(source): - print(' '*start + '^'*(end-start)) - print(' '*start + tokens[0]) - - prints:: - - sldjf123lsdjjkf345sldkjf879lkjsfd987 - ^^^^^ - sldjf - ^^^^^^^ - lsdjjkf - ^^^^^^ - sldkjf - ^^^^^^ - lkjsfd - """ - if not self.streamlined: - self.streamline() - for e in self.ignoreExprs: - e.streamline() - - if not self.keepTabs: - instring = _ustr(instring).expandtabs() - instrlen = len(instring) - loc = 0 - preparseFn = self.preParse - parseFn = self._parse - ParserElement.resetCache() - matches = 0 - try: - while loc <= instrlen and matches < maxMatches: - try: - preloc = preparseFn( instring, loc ) - nextLoc,tokens = parseFn( instring, preloc, callPreParse=False ) - except ParseException: - loc = preloc+1 - else: - if nextLoc > loc: - matches += 1 - yield tokens, preloc, nextLoc - if overlap: - nextloc = preparseFn( instring, loc ) - if nextloc > loc: - loc = nextLoc - else: - loc += 1 - else: - loc = nextLoc - else: - loc = preloc+1 - except ParseBaseException as exc: - if ParserElement.verbose_stacktrace: - raise - else: - # catch and re-raise exception from here, clears out pyparsing internal stack trace - raise exc - - def transformString( self, instring ): - """ - Extension to C{L{scanString}}, to modify matching text with modified tokens that may - be returned from a parse action. To use C{transformString}, define a grammar and - attach a parse action to it that modifies the returned token list. - Invoking C{transformString()} on a target string will then scan for matches, - and replace the matched text patterns according to the logic in the parse - action. C{transformString()} returns the resulting transformed string. - - Example:: - wd = Word(alphas) - wd.setParseAction(lambda toks: toks[0].title()) - - print(wd.transformString("now is the winter of our discontent made glorious summer by this sun of york.")) - Prints:: - Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York. - """ - out = [] - lastE = 0 - # force preservation of s, to minimize unwanted transformation of string, and to - # keep string locs straight between transformString and scanString - self.keepTabs = True - try: - for t,s,e in self.scanString( instring ): - out.append( instring[lastE:s] ) - if t: - if isinstance(t,ParseResults): - out += t.asList() - elif isinstance(t,list): - out += t - else: - out.append(t) - lastE = e - out.append(instring[lastE:]) - out = [o for o in out if o] - return "".join(map(_ustr,_flatten(out))) - except ParseBaseException as exc: - if ParserElement.verbose_stacktrace: - raise - else: - # catch and re-raise exception from here, clears out pyparsing internal stack trace - raise exc - - def searchString( self, instring, maxMatches=_MAX_INT ): - """ - Another extension to C{L{scanString}}, simplifying the access to the tokens found - to match the given parse expression. May be called with optional - C{maxMatches} argument, to clip searching after 'n' matches are found. - - Example:: - # a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters - cap_word = Word(alphas.upper(), alphas.lower()) - - print(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity")) - - # the sum() builtin can be used to merge results into a single ParseResults object - print(sum(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity"))) - prints:: - [['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']] - ['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity'] - """ - try: - return ParseResults([ t for t,s,e in self.scanString( instring, maxMatches ) ]) - except ParseBaseException as exc: - if ParserElement.verbose_stacktrace: - raise - else: - # catch and re-raise exception from here, clears out pyparsing internal stack trace - raise exc - - def split(self, instring, maxsplit=_MAX_INT, includeSeparators=False): - """ - Generator method to split a string using the given expression as a separator. - May be called with optional C{maxsplit} argument, to limit the number of splits; - and the optional C{includeSeparators} argument (default=C{False}), if the separating - matching text should be included in the split results. - - Example:: - punc = oneOf(list(".,;:/-!?")) - print(list(punc.split("This, this?, this sentence, is badly punctuated!"))) - prints:: - ['This', ' this', '', ' this sentence', ' is badly punctuated', ''] - """ - splits = 0 - last = 0 - for t,s,e in self.scanString(instring, maxMatches=maxsplit): - yield instring[last:s] - if includeSeparators: - yield t[0] - last = e - yield instring[last:] - - def __add__(self, other ): - """ - Implementation of + operator - returns C{L{And}}. Adding strings to a ParserElement - converts them to L{Literal}s by default. - - Example:: - greet = Word(alphas) + "," + Word(alphas) + "!" - hello = "Hello, World!" - print (hello, "->", greet.parseString(hello)) - Prints:: - Hello, World! -> ['Hello', ',', 'World', '!'] - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return And( [ self, other ] ) - - def __radd__(self, other ): - """ - Implementation of + operator when left operand is not a C{L{ParserElement}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return other + self - - def __sub__(self, other): - """ - Implementation of - operator, returns C{L{And}} with error stop - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return self + And._ErrorStop() + other - - def __rsub__(self, other ): - """ - Implementation of - operator when left operand is not a C{L{ParserElement}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return other - self - - def __mul__(self,other): - """ - Implementation of * operator, allows use of C{expr * 3} in place of - C{expr + expr + expr}. Expressions may also me multiplied by a 2-integer - tuple, similar to C{{min,max}} multipliers in regular expressions. Tuples - may also include C{None} as in: - - C{expr*(n,None)} or C{expr*(n,)} is equivalent - to C{expr*n + L{ZeroOrMore}(expr)} - (read as "at least n instances of C{expr}") - - C{expr*(None,n)} is equivalent to C{expr*(0,n)} - (read as "0 to n instances of C{expr}") - - C{expr*(None,None)} is equivalent to C{L{ZeroOrMore}(expr)} - - C{expr*(1,None)} is equivalent to C{L{OneOrMore}(expr)} - - Note that C{expr*(None,n)} does not raise an exception if - more than n exprs exist in the input stream; that is, - C{expr*(None,n)} does not enforce a maximum number of expr - occurrences. If this behavior is desired, then write - C{expr*(None,n) + ~expr} - """ - if isinstance(other,int): - minElements, optElements = other,0 - elif isinstance(other,tuple): - other = (other + (None, None))[:2] - if other[0] is None: - other = (0, other[1]) - if isinstance(other[0],int) and other[1] is None: - if other[0] == 0: - return ZeroOrMore(self) - if other[0] == 1: - return OneOrMore(self) - else: - return self*other[0] + ZeroOrMore(self) - elif isinstance(other[0],int) and isinstance(other[1],int): - minElements, optElements = other - optElements -= minElements - else: - raise TypeError("cannot multiply 'ParserElement' and ('%s','%s') objects", type(other[0]),type(other[1])) - else: - raise TypeError("cannot multiply 'ParserElement' and '%s' objects", type(other)) - - if minElements < 0: - raise ValueError("cannot multiply ParserElement by negative value") - if optElements < 0: - raise ValueError("second tuple value must be greater or equal to first tuple value") - if minElements == optElements == 0: - raise ValueError("cannot multiply ParserElement by 0 or (0,0)") - - if (optElements): - def makeOptionalList(n): - if n>1: - return Optional(self + makeOptionalList(n-1)) - else: - return Optional(self) - if minElements: - if minElements == 1: - ret = self + makeOptionalList(optElements) - else: - ret = And([self]*minElements) + makeOptionalList(optElements) - else: - ret = makeOptionalList(optElements) - else: - if minElements == 1: - ret = self - else: - ret = And([self]*minElements) - return ret - - def __rmul__(self, other): - return self.__mul__(other) - - def __or__(self, other ): - """ - Implementation of | operator - returns C{L{MatchFirst}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return MatchFirst( [ self, other ] ) - - def __ror__(self, other ): - """ - Implementation of | operator when left operand is not a C{L{ParserElement}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return other | self - - def __xor__(self, other ): - """ - Implementation of ^ operator - returns C{L{Or}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return Or( [ self, other ] ) - - def __rxor__(self, other ): - """ - Implementation of ^ operator when left operand is not a C{L{ParserElement}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return other ^ self - - def __and__(self, other ): - """ - Implementation of & operator - returns C{L{Each}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return Each( [ self, other ] ) - - def __rand__(self, other ): - """ - Implementation of & operator when left operand is not a C{L{ParserElement}} - """ - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - if not isinstance( other, ParserElement ): - warnings.warn("Cannot combine element of type %s with ParserElement" % type(other), - SyntaxWarning, stacklevel=2) - return None - return other & self - - def __invert__( self ): - """ - Implementation of ~ operator - returns C{L{NotAny}} - """ - return NotAny( self ) - - def __call__(self, name=None): - """ - Shortcut for C{L{setResultsName}}, with C{listAllMatches=False}. - - If C{name} is given with a trailing C{'*'} character, then C{listAllMatches} will be - passed as C{True}. - - If C{name} is omitted, same as calling C{L{copy}}. - - Example:: - # these are equivalent - userdata = Word(alphas).setResultsName("name") + Word(nums+"-").setResultsName("socsecno") - userdata = Word(alphas)("name") + Word(nums+"-")("socsecno") - """ - if name is not None: - return self.setResultsName(name) - else: - return self.copy() - - def suppress( self ): - """ - Suppresses the output of this C{ParserElement}; useful to keep punctuation from - cluttering up returned output. - """ - return Suppress( self ) - - def leaveWhitespace( self ): - """ - Disables the skipping of whitespace before matching the characters in the - C{ParserElement}'s defined pattern. This is normally only used internally by - the pyparsing module, but may be needed in some whitespace-sensitive grammars. - """ - self.skipWhitespace = False - return self - - def setWhitespaceChars( self, chars ): - """ - Overrides the default whitespace chars - """ - self.skipWhitespace = True - self.whiteChars = chars - self.copyDefaultWhiteChars = False - return self - - def parseWithTabs( self ): - """ - Overrides default behavior to expand C{}s to spaces before parsing the input string. - Must be called before C{parseString} when the input grammar contains elements that - match C{} characters. - """ - self.keepTabs = True - return self - - def ignore( self, other ): - """ - Define expression to be ignored (e.g., comments) while doing pattern - matching; may be called repeatedly, to define multiple comment or other - ignorable patterns. - - Example:: - patt = OneOrMore(Word(alphas)) - patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj'] - - patt.ignore(cStyleComment) - patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj', 'lskjd'] - """ - if isinstance(other, basestring): - other = Suppress(other) - - if isinstance( other, Suppress ): - if other not in self.ignoreExprs: - self.ignoreExprs.append(other) - else: - self.ignoreExprs.append( Suppress( other.copy() ) ) - return self - - def setDebugActions( self, startAction, successAction, exceptionAction ): - """ - Enable display of debugging messages while doing pattern matching. - """ - self.debugActions = (startAction or _defaultStartDebugAction, - successAction or _defaultSuccessDebugAction, - exceptionAction or _defaultExceptionDebugAction) - self.debug = True - return self - - def setDebug( self, flag=True ): - """ - Enable display of debugging messages while doing pattern matching. - Set C{flag} to True to enable, False to disable. - - Example:: - wd = Word(alphas).setName("alphaword") - integer = Word(nums).setName("numword") - term = wd | integer - - # turn on debugging for wd - wd.setDebug() - - OneOrMore(term).parseString("abc 123 xyz 890") - - prints:: - Match alphaword at loc 0(1,1) - Matched alphaword -> ['abc'] - Match alphaword at loc 3(1,4) - Exception raised:Expected alphaword (at char 4), (line:1, col:5) - Match alphaword at loc 7(1,8) - Matched alphaword -> ['xyz'] - Match alphaword at loc 11(1,12) - Exception raised:Expected alphaword (at char 12), (line:1, col:13) - Match alphaword at loc 15(1,16) - Exception raised:Expected alphaword (at char 15), (line:1, col:16) - - The output shown is that produced by the default debug actions - custom debug actions can be - specified using L{setDebugActions}. Prior to attempting - to match the C{wd} expression, the debugging message C{"Match at loc (,)"} - is shown. Then if the parse succeeds, a C{"Matched"} message is shown, or an C{"Exception raised"} - message is shown. Also note the use of L{setName} to assign a human-readable name to the expression, - which makes debugging and exception messages easier to understand - for instance, the default - name created for the C{Word} expression without calling C{setName} is C{"W:(ABCD...)"}. - """ - if flag: - self.setDebugActions( _defaultStartDebugAction, _defaultSuccessDebugAction, _defaultExceptionDebugAction ) - else: - self.debug = False - return self - - def __str__( self ): - return self.name - - def __repr__( self ): - return _ustr(self) - - def streamline( self ): - self.streamlined = True - self.strRepr = None - return self - - def checkRecursion( self, parseElementList ): - pass - - def validate( self, validateTrace=[] ): - """ - Check defined expressions for valid structure, check for infinite recursive definitions. - """ - self.checkRecursion( [] ) - - def parseFile( self, file_or_filename, parseAll=False ): - """ - Execute the parse expression on the given file or filename. - If a filename is specified (instead of a file object), - the entire file is opened, read, and closed before parsing. - """ - try: - file_contents = file_or_filename.read() - except AttributeError: - with open(file_or_filename, "r") as f: - file_contents = f.read() - try: - return self.parseString(file_contents, parseAll) - except ParseBaseException as exc: - if ParserElement.verbose_stacktrace: - raise - else: - # catch and re-raise exception from here, clears out pyparsing internal stack trace - raise exc - - def __eq__(self,other): - if isinstance(other, ParserElement): - return self is other or vars(self) == vars(other) - elif isinstance(other, basestring): - return self.matches(other) - else: - return super(ParserElement,self)==other - - def __ne__(self,other): - return not (self == other) - - def __hash__(self): - return hash(id(self)) - - def __req__(self,other): - return self == other - - def __rne__(self,other): - return not (self == other) - - def matches(self, testString, parseAll=True): - """ - Method for quick testing of a parser against a test string. Good for simple - inline microtests of sub expressions while building up larger parser. - - Parameters: - - testString - to test against this expression for a match - - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests - - Example:: - expr = Word(nums) - assert expr.matches("100") - """ - try: - self.parseString(_ustr(testString), parseAll=parseAll) - return True - except ParseBaseException: - return False - - def runTests(self, tests, parseAll=True, comment='#', fullDump=True, printResults=True, failureTests=False): - """ - Execute the parse expression on a series of test strings, showing each - test, the parsed results or where the parse failed. Quick and easy way to - run a parse expression against a list of sample strings. - - Parameters: - - tests - a list of separate test strings, or a multiline string of test strings - - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests - - comment - (default=C{'#'}) - expression for indicating embedded comments in the test - string; pass None to disable comment filtering - - fullDump - (default=C{True}) - dump results as list followed by results names in nested outline; - if False, only dump nested list - - printResults - (default=C{True}) prints test output to stdout - - failureTests - (default=C{False}) indicates if these tests are expected to fail parsing - - Returns: a (success, results) tuple, where success indicates that all tests succeeded - (or failed if C{failureTests} is True), and the results contain a list of lines of each - test's output - - Example:: - number_expr = pyparsing_common.number.copy() - - result = number_expr.runTests(''' - # unsigned integer - 100 - # negative integer - -100 - # float with scientific notation - 6.02e23 - # integer with scientific notation - 1e-12 - ''') - print("Success" if result[0] else "Failed!") - - result = number_expr.runTests(''' - # stray character - 100Z - # missing leading digit before '.' - -.100 - # too many '.' - 3.14.159 - ''', failureTests=True) - print("Success" if result[0] else "Failed!") - prints:: - # unsigned integer - 100 - [100] - - # negative integer - -100 - [-100] - - # float with scientific notation - 6.02e23 - [6.02e+23] - - # integer with scientific notation - 1e-12 - [1e-12] - - Success - - # stray character - 100Z - ^ - FAIL: Expected end of text (at char 3), (line:1, col:4) - - # missing leading digit before '.' - -.100 - ^ - FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1) - - # too many '.' - 3.14.159 - ^ - FAIL: Expected end of text (at char 4), (line:1, col:5) - - Success - - Each test string must be on a single line. If you want to test a string that spans multiple - lines, create a test like this:: - - expr.runTest(r"this is a test\\n of strings that spans \\n 3 lines") - - (Note that this is a raw string literal, you must include the leading 'r'.) - """ - if isinstance(tests, basestring): - tests = list(map(str.strip, tests.rstrip().splitlines())) - if isinstance(comment, basestring): - comment = Literal(comment) - allResults = [] - comments = [] - success = True - for t in tests: - if comment is not None and comment.matches(t, False) or comments and not t: - comments.append(t) - continue - if not t: - continue - out = ['\n'.join(comments), t] - comments = [] - try: - t = t.replace(r'\n','\n') - result = self.parseString(t, parseAll=parseAll) - out.append(result.dump(full=fullDump)) - success = success and not failureTests - except ParseBaseException as pe: - fatal = "(FATAL)" if isinstance(pe, ParseFatalException) else "" - if '\n' in t: - out.append(line(pe.loc, t)) - out.append(' '*(col(pe.loc,t)-1) + '^' + fatal) - else: - out.append(' '*pe.loc + '^' + fatal) - out.append("FAIL: " + str(pe)) - success = success and failureTests - result = pe - except Exception as exc: - out.append("FAIL-EXCEPTION: " + str(exc)) - success = success and failureTests - result = exc - - if printResults: - if fullDump: - out.append('') - print('\n'.join(out)) - - allResults.append((t, result)) - - return success, allResults - - -class Token(ParserElement): - """ - Abstract C{ParserElement} subclass, for defining atomic matching patterns. - """ - def __init__( self ): - super(Token,self).__init__( savelist=False ) - - -class Empty(Token): - """ - An empty token, will always match. - """ - def __init__( self ): - super(Empty,self).__init__() - self.name = "Empty" - self.mayReturnEmpty = True - self.mayIndexError = False - - -class NoMatch(Token): - """ - A token that will never match. - """ - def __init__( self ): - super(NoMatch,self).__init__() - self.name = "NoMatch" - self.mayReturnEmpty = True - self.mayIndexError = False - self.errmsg = "Unmatchable token" - - def parseImpl( self, instring, loc, doActions=True ): - raise ParseException(instring, loc, self.errmsg, self) - - -class Literal(Token): - """ - Token to exactly match a specified string. - - Example:: - Literal('blah').parseString('blah') # -> ['blah'] - Literal('blah').parseString('blahfooblah') # -> ['blah'] - Literal('blah').parseString('bla') # -> Exception: Expected "blah" - - For case-insensitive matching, use L{CaselessLiteral}. - - For keyword matching (force word break before and after the matched string), - use L{Keyword} or L{CaselessKeyword}. - """ - def __init__( self, matchString ): - super(Literal,self).__init__() - self.match = matchString - self.matchLen = len(matchString) - try: - self.firstMatchChar = matchString[0] - except IndexError: - warnings.warn("null string passed to Literal; use Empty() instead", - SyntaxWarning, stacklevel=2) - self.__class__ = Empty - self.name = '"%s"' % _ustr(self.match) - self.errmsg = "Expected " + self.name - self.mayReturnEmpty = False - self.mayIndexError = False - - # Performance tuning: this routine gets called a *lot* - # if this is a single character match string and the first character matches, - # short-circuit as quickly as possible, and avoid calling startswith - #~ @profile - def parseImpl( self, instring, loc, doActions=True ): - if (instring[loc] == self.firstMatchChar and - (self.matchLen==1 or instring.startswith(self.match,loc)) ): - return loc+self.matchLen, self.match - raise ParseException(instring, loc, self.errmsg, self) -_L = Literal -ParserElement._literalStringClass = Literal - -class Keyword(Token): - """ - Token to exactly match a specified string as a keyword, that is, it must be - immediately followed by a non-keyword character. Compare with C{L{Literal}}: - - C{Literal("if")} will match the leading C{'if'} in C{'ifAndOnlyIf'}. - - C{Keyword("if")} will not; it will only match the leading C{'if'} in C{'if x=1'}, or C{'if(y==2)'} - Accepts two optional constructor arguments in addition to the keyword string: - - C{identChars} is a string of characters that would be valid identifier characters, - defaulting to all alphanumerics + "_" and "$" - - C{caseless} allows case-insensitive matching, default is C{False}. - - Example:: - Keyword("start").parseString("start") # -> ['start'] - Keyword("start").parseString("starting") # -> Exception - - For case-insensitive matching, use L{CaselessKeyword}. - """ - DEFAULT_KEYWORD_CHARS = alphanums+"_$" - - def __init__( self, matchString, identChars=None, caseless=False ): - super(Keyword,self).__init__() - if identChars is None: - identChars = Keyword.DEFAULT_KEYWORD_CHARS - self.match = matchString - self.matchLen = len(matchString) - try: - self.firstMatchChar = matchString[0] - except IndexError: - warnings.warn("null string passed to Keyword; use Empty() instead", - SyntaxWarning, stacklevel=2) - self.name = '"%s"' % self.match - self.errmsg = "Expected " + self.name - self.mayReturnEmpty = False - self.mayIndexError = False - self.caseless = caseless - if caseless: - self.caselessmatch = matchString.upper() - identChars = identChars.upper() - self.identChars = set(identChars) - - def parseImpl( self, instring, loc, doActions=True ): - if self.caseless: - if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and - (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) and - (loc == 0 or instring[loc-1].upper() not in self.identChars) ): - return loc+self.matchLen, self.match - else: - if (instring[loc] == self.firstMatchChar and - (self.matchLen==1 or instring.startswith(self.match,loc)) and - (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen] not in self.identChars) and - (loc == 0 or instring[loc-1] not in self.identChars) ): - return loc+self.matchLen, self.match - raise ParseException(instring, loc, self.errmsg, self) - - def copy(self): - c = super(Keyword,self).copy() - c.identChars = Keyword.DEFAULT_KEYWORD_CHARS - return c - - @staticmethod - def setDefaultKeywordChars( chars ): - """Overrides the default Keyword chars - """ - Keyword.DEFAULT_KEYWORD_CHARS = chars - -class CaselessLiteral(Literal): - """ - Token to match a specified string, ignoring case of letters. - Note: the matched results will always be in the case of the given - match string, NOT the case of the input text. - - Example:: - OneOrMore(CaselessLiteral("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD', 'CMD'] - - (Contrast with example for L{CaselessKeyword}.) - """ - def __init__( self, matchString ): - super(CaselessLiteral,self).__init__( matchString.upper() ) - # Preserve the defining literal. - self.returnString = matchString - self.name = "'%s'" % self.returnString - self.errmsg = "Expected " + self.name - - def parseImpl( self, instring, loc, doActions=True ): - if instring[ loc:loc+self.matchLen ].upper() == self.match: - return loc+self.matchLen, self.returnString - raise ParseException(instring, loc, self.errmsg, self) - -class CaselessKeyword(Keyword): - """ - Caseless version of L{Keyword}. - - Example:: - OneOrMore(CaselessKeyword("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD'] - - (Contrast with example for L{CaselessLiteral}.) - """ - def __init__( self, matchString, identChars=None ): - super(CaselessKeyword,self).__init__( matchString, identChars, caseless=True ) - - def parseImpl( self, instring, loc, doActions=True ): - if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and - (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) ): - return loc+self.matchLen, self.match - raise ParseException(instring, loc, self.errmsg, self) - -class CloseMatch(Token): - """ - A variation on L{Literal} which matches "close" matches, that is, - strings with at most 'n' mismatching characters. C{CloseMatch} takes parameters: - - C{match_string} - string to be matched - - C{maxMismatches} - (C{default=1}) maximum number of mismatches allowed to count as a match - - The results from a successful parse will contain the matched text from the input string and the following named results: - - C{mismatches} - a list of the positions within the match_string where mismatches were found - - C{original} - the original match_string used to compare against the input string - - If C{mismatches} is an empty list, then the match was an exact match. - - Example:: - patt = CloseMatch("ATCATCGAATGGA") - patt.parseString("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']}) - patt.parseString("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1) - - # exact match - patt.parseString("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']}) - - # close match allowing up to 2 mismatches - patt = CloseMatch("ATCATCGAATGGA", maxMismatches=2) - patt.parseString("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']}) - """ - def __init__(self, match_string, maxMismatches=1): - super(CloseMatch,self).__init__() - self.name = match_string - self.match_string = match_string - self.maxMismatches = maxMismatches - self.errmsg = "Expected %r (with up to %d mismatches)" % (self.match_string, self.maxMismatches) - self.mayIndexError = False - self.mayReturnEmpty = False - - def parseImpl( self, instring, loc, doActions=True ): - start = loc - instrlen = len(instring) - maxloc = start + len(self.match_string) - - if maxloc <= instrlen: - match_string = self.match_string - match_stringloc = 0 - mismatches = [] - maxMismatches = self.maxMismatches - - for match_stringloc,s_m in enumerate(zip(instring[loc:maxloc], self.match_string)): - src,mat = s_m - if src != mat: - mismatches.append(match_stringloc) - if len(mismatches) > maxMismatches: - break - else: - loc = match_stringloc + 1 - results = ParseResults([instring[start:loc]]) - results['original'] = self.match_string - results['mismatches'] = mismatches - return loc, results - - raise ParseException(instring, loc, self.errmsg, self) - - -class Word(Token): - """ - Token for matching words composed of allowed character sets. - Defined with string containing all allowed initial characters, - an optional string containing allowed body characters (if omitted, - defaults to the initial character set), and an optional minimum, - maximum, and/or exact length. The default value for C{min} is 1 (a - minimum value < 1 is not valid); the default values for C{max} and C{exact} - are 0, meaning no maximum or exact length restriction. An optional - C{excludeChars} parameter can list characters that might be found in - the input C{bodyChars} string; useful to define a word of all printables - except for one or two characters, for instance. - - L{srange} is useful for defining custom character set strings for defining - C{Word} expressions, using range notation from regular expression character sets. - - A common mistake is to use C{Word} to match a specific literal string, as in - C{Word("Address")}. Remember that C{Word} uses the string argument to define - I{sets} of matchable characters. This expression would match "Add", "AAA", - "dAred", or any other word made up of the characters 'A', 'd', 'r', 'e', and 's'. - To match an exact literal string, use L{Literal} or L{Keyword}. - - pyparsing includes helper strings for building Words: - - L{alphas} - - L{nums} - - L{alphanums} - - L{hexnums} - - L{alphas8bit} (alphabetic characters in ASCII range 128-255 - accented, tilded, umlauted, etc.) - - L{punc8bit} (non-alphabetic characters in ASCII range 128-255 - currency, symbols, superscripts, diacriticals, etc.) - - L{printables} (any non-whitespace character) - - Example:: - # a word composed of digits - integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9")) - - # a word with a leading capital, and zero or more lowercase - capital_word = Word(alphas.upper(), alphas.lower()) - - # hostnames are alphanumeric, with leading alpha, and '-' - hostname = Word(alphas, alphanums+'-') - - # roman numeral (not a strict parser, accepts invalid mix of characters) - roman = Word("IVXLCDM") - - # any string of non-whitespace characters, except for ',' - csv_value = Word(printables, excludeChars=",") - """ - def __init__( self, initChars, bodyChars=None, min=1, max=0, exact=0, asKeyword=False, excludeChars=None ): - super(Word,self).__init__() - if excludeChars: - initChars = ''.join(c for c in initChars if c not in excludeChars) - if bodyChars: - bodyChars = ''.join(c for c in bodyChars if c not in excludeChars) - self.initCharsOrig = initChars - self.initChars = set(initChars) - if bodyChars : - self.bodyCharsOrig = bodyChars - self.bodyChars = set(bodyChars) - else: - self.bodyCharsOrig = initChars - self.bodyChars = set(initChars) - - self.maxSpecified = max > 0 - - if min < 1: - raise ValueError("cannot specify a minimum length < 1; use Optional(Word()) if zero-length word is permitted") - - self.minLen = min - - if max > 0: - self.maxLen = max - else: - self.maxLen = _MAX_INT - - if exact > 0: - self.maxLen = exact - self.minLen = exact - - self.name = _ustr(self) - self.errmsg = "Expected " + self.name - self.mayIndexError = False - self.asKeyword = asKeyword - - if ' ' not in self.initCharsOrig+self.bodyCharsOrig and (min==1 and max==0 and exact==0): - if self.bodyCharsOrig == self.initCharsOrig: - self.reString = "[%s]+" % _escapeRegexRangeChars(self.initCharsOrig) - elif len(self.initCharsOrig) == 1: - self.reString = "%s[%s]*" % \ - (re.escape(self.initCharsOrig), - _escapeRegexRangeChars(self.bodyCharsOrig),) - else: - self.reString = "[%s][%s]*" % \ - (_escapeRegexRangeChars(self.initCharsOrig), - _escapeRegexRangeChars(self.bodyCharsOrig),) - if self.asKeyword: - self.reString = r"\b"+self.reString+r"\b" - try: - self.re = re.compile( self.reString ) - except Exception: - self.re = None - - def parseImpl( self, instring, loc, doActions=True ): - if self.re: - result = self.re.match(instring,loc) - if not result: - raise ParseException(instring, loc, self.errmsg, self) - - loc = result.end() - return loc, result.group() - - if not(instring[ loc ] in self.initChars): - raise ParseException(instring, loc, self.errmsg, self) - - start = loc - loc += 1 - instrlen = len(instring) - bodychars = self.bodyChars - maxloc = start + self.maxLen - maxloc = min( maxloc, instrlen ) - while loc < maxloc and instring[loc] in bodychars: - loc += 1 - - throwException = False - if loc - start < self.minLen: - throwException = True - if self.maxSpecified and loc < instrlen and instring[loc] in bodychars: - throwException = True - if self.asKeyword: - if (start>0 and instring[start-1] in bodychars) or (loc4: - return s[:4]+"..." - else: - return s - - if ( self.initCharsOrig != self.bodyCharsOrig ): - self.strRepr = "W:(%s,%s)" % ( charsAsStr(self.initCharsOrig), charsAsStr(self.bodyCharsOrig) ) - else: - self.strRepr = "W:(%s)" % charsAsStr(self.initCharsOrig) - - return self.strRepr - - -class Regex(Token): - r""" - Token for matching strings that match a given regular expression. - Defined with string specifying the regular expression in a form recognized by the inbuilt Python re module. - If the given regex contains named groups (defined using C{(?P...)}), these will be preserved as - named parse results. - - Example:: - realnum = Regex(r"[+-]?\d+\.\d*") - date = Regex(r'(?P\d{4})-(?P\d\d?)-(?P\d\d?)') - # ref: http://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression - roman = Regex(r"M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})") - """ - compiledREtype = type(re.compile("[A-Z]")) - def __init__( self, pattern, flags=0): - """The parameters C{pattern} and C{flags} are passed to the C{re.compile()} function as-is. See the Python C{re} module for an explanation of the acceptable patterns and flags.""" - super(Regex,self).__init__() - - if isinstance(pattern, basestring): - if not pattern: - warnings.warn("null string passed to Regex; use Empty() instead", - SyntaxWarning, stacklevel=2) - - self.pattern = pattern - self.flags = flags - - try: - self.re = re.compile(self.pattern, self.flags) - self.reString = self.pattern - except sre_constants.error: - warnings.warn("invalid pattern (%s) passed to Regex" % pattern, - SyntaxWarning, stacklevel=2) - raise - - elif isinstance(pattern, Regex.compiledREtype): - self.re = pattern - self.pattern = \ - self.reString = str(pattern) - self.flags = flags - - else: - raise ValueError("Regex may only be constructed with a string or a compiled RE object") - - self.name = _ustr(self) - self.errmsg = "Expected " + self.name - self.mayIndexError = False - self.mayReturnEmpty = True - - def parseImpl( self, instring, loc, doActions=True ): - result = self.re.match(instring,loc) - if not result: - raise ParseException(instring, loc, self.errmsg, self) - - loc = result.end() - d = result.groupdict() - ret = ParseResults(result.group()) - if d: - for k in d: - ret[k] = d[k] - return loc,ret - - def __str__( self ): - try: - return super(Regex,self).__str__() - except Exception: - pass - - if self.strRepr is None: - self.strRepr = "Re:(%s)" % repr(self.pattern) - - return self.strRepr - - -class QuotedString(Token): - r""" - Token for matching strings that are delimited by quoting characters. - - Defined with the following parameters: - - quoteChar - string of one or more characters defining the quote delimiting string - - escChar - character to escape quotes, typically backslash (default=C{None}) - - escQuote - special quote sequence to escape an embedded quote string (such as SQL's "" to escape an embedded ") (default=C{None}) - - multiline - boolean indicating whether quotes can span multiple lines (default=C{False}) - - unquoteResults - boolean indicating whether the matched text should be unquoted (default=C{True}) - - endQuoteChar - string of one or more characters defining the end of the quote delimited string (default=C{None} => same as quoteChar) - - convertWhitespaceEscapes - convert escaped whitespace (C{'\t'}, C{'\n'}, etc.) to actual whitespace (default=C{True}) - - Example:: - qs = QuotedString('"') - print(qs.searchString('lsjdf "This is the quote" sldjf')) - complex_qs = QuotedString('{{', endQuoteChar='}}') - print(complex_qs.searchString('lsjdf {{This is the "quote"}} sldjf')) - sql_qs = QuotedString('"', escQuote='""') - print(sql_qs.searchString('lsjdf "This is the quote with ""embedded"" quotes" sldjf')) - prints:: - [['This is the quote']] - [['This is the "quote"']] - [['This is the quote with "embedded" quotes']] - """ - def __init__( self, quoteChar, escChar=None, escQuote=None, multiline=False, unquoteResults=True, endQuoteChar=None, convertWhitespaceEscapes=True): - super(QuotedString,self).__init__() - - # remove white space from quote chars - wont work anyway - quoteChar = quoteChar.strip() - if not quoteChar: - warnings.warn("quoteChar cannot be the empty string",SyntaxWarning,stacklevel=2) - raise SyntaxError() - - if endQuoteChar is None: - endQuoteChar = quoteChar - else: - endQuoteChar = endQuoteChar.strip() - if not endQuoteChar: - warnings.warn("endQuoteChar cannot be the empty string",SyntaxWarning,stacklevel=2) - raise SyntaxError() - - self.quoteChar = quoteChar - self.quoteCharLen = len(quoteChar) - self.firstQuoteChar = quoteChar[0] - self.endQuoteChar = endQuoteChar - self.endQuoteCharLen = len(endQuoteChar) - self.escChar = escChar - self.escQuote = escQuote - self.unquoteResults = unquoteResults - self.convertWhitespaceEscapes = convertWhitespaceEscapes - - if multiline: - self.flags = re.MULTILINE | re.DOTALL - self.pattern = r'%s(?:[^%s%s]' % \ - ( re.escape(self.quoteChar), - _escapeRegexRangeChars(self.endQuoteChar[0]), - (escChar is not None and _escapeRegexRangeChars(escChar) or '') ) - else: - self.flags = 0 - self.pattern = r'%s(?:[^%s\n\r%s]' % \ - ( re.escape(self.quoteChar), - _escapeRegexRangeChars(self.endQuoteChar[0]), - (escChar is not None and _escapeRegexRangeChars(escChar) or '') ) - if len(self.endQuoteChar) > 1: - self.pattern += ( - '|(?:' + ')|(?:'.join("%s[^%s]" % (re.escape(self.endQuoteChar[:i]), - _escapeRegexRangeChars(self.endQuoteChar[i])) - for i in range(len(self.endQuoteChar)-1,0,-1)) + ')' - ) - if escQuote: - self.pattern += (r'|(?:%s)' % re.escape(escQuote)) - if escChar: - self.pattern += (r'|(?:%s.)' % re.escape(escChar)) - self.escCharReplacePattern = re.escape(self.escChar)+"(.)" - self.pattern += (r')*%s' % re.escape(self.endQuoteChar)) - - try: - self.re = re.compile(self.pattern, self.flags) - self.reString = self.pattern - except sre_constants.error: - warnings.warn("invalid pattern (%s) passed to Regex" % self.pattern, - SyntaxWarning, stacklevel=2) - raise - - self.name = _ustr(self) - self.errmsg = "Expected " + self.name - self.mayIndexError = False - self.mayReturnEmpty = True - - def parseImpl( self, instring, loc, doActions=True ): - result = instring[loc] == self.firstQuoteChar and self.re.match(instring,loc) or None - if not result: - raise ParseException(instring, loc, self.errmsg, self) - - loc = result.end() - ret = result.group() - - if self.unquoteResults: - - # strip off quotes - ret = ret[self.quoteCharLen:-self.endQuoteCharLen] - - if isinstance(ret,basestring): - # replace escaped whitespace - if '\\' in ret and self.convertWhitespaceEscapes: - ws_map = { - r'\t' : '\t', - r'\n' : '\n', - r'\f' : '\f', - r'\r' : '\r', - } - for wslit,wschar in ws_map.items(): - ret = ret.replace(wslit, wschar) - - # replace escaped characters - if self.escChar: - ret = re.sub(self.escCharReplacePattern, r"\g<1>", ret) - - # replace escaped quotes - if self.escQuote: - ret = ret.replace(self.escQuote, self.endQuoteChar) - - return loc, ret - - def __str__( self ): - try: - return super(QuotedString,self).__str__() - except Exception: - pass - - if self.strRepr is None: - self.strRepr = "quoted string, starting with %s ending with %s" % (self.quoteChar, self.endQuoteChar) - - return self.strRepr - - -class CharsNotIn(Token): - """ - Token for matching words composed of characters I{not} in a given set (will - include whitespace in matched characters if not listed in the provided exclusion set - see example). - Defined with string containing all disallowed characters, and an optional - minimum, maximum, and/or exact length. The default value for C{min} is 1 (a - minimum value < 1 is not valid); the default values for C{max} and C{exact} - are 0, meaning no maximum or exact length restriction. - - Example:: - # define a comma-separated-value as anything that is not a ',' - csv_value = CharsNotIn(',') - print(delimitedList(csv_value).parseString("dkls,lsdkjf,s12 34,@!#,213")) - prints:: - ['dkls', 'lsdkjf', 's12 34', '@!#', '213'] - """ - def __init__( self, notChars, min=1, max=0, exact=0 ): - super(CharsNotIn,self).__init__() - self.skipWhitespace = False - self.notChars = notChars - - if min < 1: - raise ValueError("cannot specify a minimum length < 1; use Optional(CharsNotIn()) if zero-length char group is permitted") - - self.minLen = min - - if max > 0: - self.maxLen = max - else: - self.maxLen = _MAX_INT - - if exact > 0: - self.maxLen = exact - self.minLen = exact - - self.name = _ustr(self) - self.errmsg = "Expected " + self.name - self.mayReturnEmpty = ( self.minLen == 0 ) - self.mayIndexError = False - - def parseImpl( self, instring, loc, doActions=True ): - if instring[loc] in self.notChars: - raise ParseException(instring, loc, self.errmsg, self) - - start = loc - loc += 1 - notchars = self.notChars - maxlen = min( start+self.maxLen, len(instring) ) - while loc < maxlen and \ - (instring[loc] not in notchars): - loc += 1 - - if loc - start < self.minLen: - raise ParseException(instring, loc, self.errmsg, self) - - return loc, instring[start:loc] - - def __str__( self ): - try: - return super(CharsNotIn, self).__str__() - except Exception: - pass - - if self.strRepr is None: - if len(self.notChars) > 4: - self.strRepr = "!W:(%s...)" % self.notChars[:4] - else: - self.strRepr = "!W:(%s)" % self.notChars - - return self.strRepr - -class White(Token): - """ - Special matching class for matching whitespace. Normally, whitespace is ignored - by pyparsing grammars. This class is included when some whitespace structures - are significant. Define with a string containing the whitespace characters to be - matched; default is C{" \\t\\r\\n"}. Also takes optional C{min}, C{max}, and C{exact} arguments, - as defined for the C{L{Word}} class. - """ - whiteStrs = { - " " : "", - "\t": "", - "\n": "", - "\r": "", - "\f": "", - } - def __init__(self, ws=" \t\r\n", min=1, max=0, exact=0): - super(White,self).__init__() - self.matchWhite = ws - self.setWhitespaceChars( "".join(c for c in self.whiteChars if c not in self.matchWhite) ) - #~ self.leaveWhitespace() - self.name = ("".join(White.whiteStrs[c] for c in self.matchWhite)) - self.mayReturnEmpty = True - self.errmsg = "Expected " + self.name - - self.minLen = min - - if max > 0: - self.maxLen = max - else: - self.maxLen = _MAX_INT - - if exact > 0: - self.maxLen = exact - self.minLen = exact - - def parseImpl( self, instring, loc, doActions=True ): - if not(instring[ loc ] in self.matchWhite): - raise ParseException(instring, loc, self.errmsg, self) - start = loc - loc += 1 - maxloc = start + self.maxLen - maxloc = min( maxloc, len(instring) ) - while loc < maxloc and instring[loc] in self.matchWhite: - loc += 1 - - if loc - start < self.minLen: - raise ParseException(instring, loc, self.errmsg, self) - - return loc, instring[start:loc] - - -class _PositionToken(Token): - def __init__( self ): - super(_PositionToken,self).__init__() - self.name=self.__class__.__name__ - self.mayReturnEmpty = True - self.mayIndexError = False - -class GoToColumn(_PositionToken): - """ - Token to advance to a specific column of input text; useful for tabular report scraping. - """ - def __init__( self, colno ): - super(GoToColumn,self).__init__() - self.col = colno - - def preParse( self, instring, loc ): - if col(loc,instring) != self.col: - instrlen = len(instring) - if self.ignoreExprs: - loc = self._skipIgnorables( instring, loc ) - while loc < instrlen and instring[loc].isspace() and col( loc, instring ) != self.col : - loc += 1 - return loc - - def parseImpl( self, instring, loc, doActions=True ): - thiscol = col( loc, instring ) - if thiscol > self.col: - raise ParseException( instring, loc, "Text not in expected column", self ) - newloc = loc + self.col - thiscol - ret = instring[ loc: newloc ] - return newloc, ret - - -class LineStart(_PositionToken): - """ - Matches if current position is at the beginning of a line within the parse string - - Example:: - - test = '''\ - AAA this line - AAA and this line - AAA but not this one - B AAA and definitely not this one - ''' - - for t in (LineStart() + 'AAA' + restOfLine).searchString(test): - print(t) - - Prints:: - ['AAA', ' this line'] - ['AAA', ' and this line'] - - """ - def __init__( self ): - super(LineStart,self).__init__() - self.errmsg = "Expected start of line" - - def parseImpl( self, instring, loc, doActions=True ): - if col(loc, instring) == 1: - return loc, [] - raise ParseException(instring, loc, self.errmsg, self) - -class LineEnd(_PositionToken): - """ - Matches if current position is at the end of a line within the parse string - """ - def __init__( self ): - super(LineEnd,self).__init__() - self.setWhitespaceChars( ParserElement.DEFAULT_WHITE_CHARS.replace("\n","") ) - self.errmsg = "Expected end of line" - - def parseImpl( self, instring, loc, doActions=True ): - if loc len(instring): - return loc, [] - else: - raise ParseException(instring, loc, self.errmsg, self) - -class WordStart(_PositionToken): - """ - Matches if the current position is at the beginning of a Word, and - is not preceded by any character in a given set of C{wordChars} - (default=C{printables}). To emulate the C{\b} behavior of regular expressions, - use C{WordStart(alphanums)}. C{WordStart} will also match at the beginning of - the string being parsed, or at the beginning of a line. - """ - def __init__(self, wordChars = printables): - super(WordStart,self).__init__() - self.wordChars = set(wordChars) - self.errmsg = "Not at the start of a word" - - def parseImpl(self, instring, loc, doActions=True ): - if loc != 0: - if (instring[loc-1] in self.wordChars or - instring[loc] not in self.wordChars): - raise ParseException(instring, loc, self.errmsg, self) - return loc, [] - -class WordEnd(_PositionToken): - """ - Matches if the current position is at the end of a Word, and - is not followed by any character in a given set of C{wordChars} - (default=C{printables}). To emulate the C{\b} behavior of regular expressions, - use C{WordEnd(alphanums)}. C{WordEnd} will also match at the end of - the string being parsed, or at the end of a line. - """ - def __init__(self, wordChars = printables): - super(WordEnd,self).__init__() - self.wordChars = set(wordChars) - self.skipWhitespace = False - self.errmsg = "Not at the end of a word" - - def parseImpl(self, instring, loc, doActions=True ): - instrlen = len(instring) - if instrlen>0 and loc maxExcLoc: - maxException = err - maxExcLoc = err.loc - except IndexError: - if len(instring) > maxExcLoc: - maxException = ParseException(instring,len(instring),e.errmsg,self) - maxExcLoc = len(instring) - else: - # save match among all matches, to retry longest to shortest - matches.append((loc2, e)) - - if matches: - matches.sort(key=lambda x: -x[0]) - for _,e in matches: - try: - return e._parse( instring, loc, doActions ) - except ParseException as err: - err.__traceback__ = None - if err.loc > maxExcLoc: - maxException = err - maxExcLoc = err.loc - - if maxException is not None: - maxException.msg = self.errmsg - raise maxException - else: - raise ParseException(instring, loc, "no defined alternatives to match", self) - - - def __ixor__(self, other ): - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - return self.append( other ) #Or( [ self, other ] ) - - def __str__( self ): - if hasattr(self,"name"): - return self.name - - if self.strRepr is None: - self.strRepr = "{" + " ^ ".join(_ustr(e) for e in self.exprs) + "}" - - return self.strRepr - - def checkRecursion( self, parseElementList ): - subRecCheckList = parseElementList[:] + [ self ] - for e in self.exprs: - e.checkRecursion( subRecCheckList ) - - -class MatchFirst(ParseExpression): - """ - Requires that at least one C{ParseExpression} is found. - If two expressions match, the first one listed is the one that will match. - May be constructed using the C{'|'} operator. - - Example:: - # construct MatchFirst using '|' operator - - # watch the order of expressions to match - number = Word(nums) | Combine(Word(nums) + '.' + Word(nums)) - print(number.searchString("123 3.1416 789")) # Fail! -> [['123'], ['3'], ['1416'], ['789']] - - # put more selective expression first - number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums) - print(number.searchString("123 3.1416 789")) # Better -> [['123'], ['3.1416'], ['789']] - """ - def __init__( self, exprs, savelist = False ): - super(MatchFirst,self).__init__(exprs, savelist) - if self.exprs: - self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs) - else: - self.mayReturnEmpty = True - - def parseImpl( self, instring, loc, doActions=True ): - maxExcLoc = -1 - maxException = None - for e in self.exprs: - try: - ret = e._parse( instring, loc, doActions ) - return ret - except ParseException as err: - if err.loc > maxExcLoc: - maxException = err - maxExcLoc = err.loc - except IndexError: - if len(instring) > maxExcLoc: - maxException = ParseException(instring,len(instring),e.errmsg,self) - maxExcLoc = len(instring) - - # only got here if no expression matched, raise exception for match that made it the furthest - else: - if maxException is not None: - maxException.msg = self.errmsg - raise maxException - else: - raise ParseException(instring, loc, "no defined alternatives to match", self) - - def __ior__(self, other ): - if isinstance( other, basestring ): - other = ParserElement._literalStringClass( other ) - return self.append( other ) #MatchFirst( [ self, other ] ) - - def __str__( self ): - if hasattr(self,"name"): - return self.name - - if self.strRepr is None: - self.strRepr = "{" + " | ".join(_ustr(e) for e in self.exprs) + "}" - - return self.strRepr - - def checkRecursion( self, parseElementList ): - subRecCheckList = parseElementList[:] + [ self ] - for e in self.exprs: - e.checkRecursion( subRecCheckList ) - - -class Each(ParseExpression): - """ - Requires all given C{ParseExpression}s to be found, but in any order. - Expressions may be separated by whitespace. - May be constructed using the C{'&'} operator. - - Example:: - color = oneOf("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN") - shape_type = oneOf("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON") - integer = Word(nums) - shape_attr = "shape:" + shape_type("shape") - posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn") - color_attr = "color:" + color("color") - size_attr = "size:" + integer("size") - - # use Each (using operator '&') to accept attributes in any order - # (shape and posn are required, color and size are optional) - shape_spec = shape_attr & posn_attr & Optional(color_attr) & Optional(size_attr) - - shape_spec.runTests(''' - shape: SQUARE color: BLACK posn: 100, 120 - shape: CIRCLE size: 50 color: BLUE posn: 50,80 - color:GREEN size:20 shape:TRIANGLE posn:20,40 - ''' - ) - prints:: - shape: SQUARE color: BLACK posn: 100, 120 - ['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']] - - color: BLACK - - posn: ['100', ',', '120'] - - x: 100 - - y: 120 - - shape: SQUARE - - - shape: CIRCLE size: 50 color: BLUE posn: 50,80 - ['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']] - - color: BLUE - - posn: ['50', ',', '80'] - - x: 50 - - y: 80 - - shape: CIRCLE - - size: 50 - - - color: GREEN size: 20 shape: TRIANGLE posn: 20,40 - ['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']] - - color: GREEN - - posn: ['20', ',', '40'] - - x: 20 - - y: 40 - - shape: TRIANGLE - - size: 20 - """ - def __init__( self, exprs, savelist = True ): - super(Each,self).__init__(exprs, savelist) - self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs) - self.skipWhitespace = True - self.initExprGroups = True - - def parseImpl( self, instring, loc, doActions=True ): - if self.initExprGroups: - self.opt1map = dict((id(e.expr),e) for e in self.exprs if isinstance(e,Optional)) - opt1 = [ e.expr for e in self.exprs if isinstance(e,Optional) ] - opt2 = [ e for e in self.exprs if e.mayReturnEmpty and not isinstance(e,Optional)] - self.optionals = opt1 + opt2 - self.multioptionals = [ e.expr for e in self.exprs if isinstance(e,ZeroOrMore) ] - self.multirequired = [ e.expr for e in self.exprs if isinstance(e,OneOrMore) ] - self.required = [ e for e in self.exprs if not isinstance(e,(Optional,ZeroOrMore,OneOrMore)) ] - self.required += self.multirequired - self.initExprGroups = False - tmpLoc = loc - tmpReqd = self.required[:] - tmpOpt = self.optionals[:] - matchOrder = [] - - keepMatching = True - while keepMatching: - tmpExprs = tmpReqd + tmpOpt + self.multioptionals + self.multirequired - failed = [] - for e in tmpExprs: - try: - tmpLoc = e.tryParse( instring, tmpLoc ) - except ParseException: - failed.append(e) - else: - matchOrder.append(self.opt1map.get(id(e),e)) - if e in tmpReqd: - tmpReqd.remove(e) - elif e in tmpOpt: - tmpOpt.remove(e) - if len(failed) == len(tmpExprs): - keepMatching = False - - if tmpReqd: - missing = ", ".join(_ustr(e) for e in tmpReqd) - raise ParseException(instring,loc,"Missing one or more required elements (%s)" % missing ) - - # add any unmatched Optionals, in case they have default values defined - matchOrder += [e for e in self.exprs if isinstance(e,Optional) and e.expr in tmpOpt] - - resultlist = [] - for e in matchOrder: - loc,results = e._parse(instring,loc,doActions) - resultlist.append(results) - - finalResults = sum(resultlist, ParseResults([])) - return loc, finalResults - - def __str__( self ): - if hasattr(self,"name"): - return self.name - - if self.strRepr is None: - self.strRepr = "{" + " & ".join(_ustr(e) for e in self.exprs) + "}" - - return self.strRepr - - def checkRecursion( self, parseElementList ): - subRecCheckList = parseElementList[:] + [ self ] - for e in self.exprs: - e.checkRecursion( subRecCheckList ) - - -class ParseElementEnhance(ParserElement): - """ - Abstract subclass of C{ParserElement}, for combining and post-processing parsed tokens. - """ - def __init__( self, expr, savelist=False ): - super(ParseElementEnhance,self).__init__(savelist) - if isinstance( expr, basestring ): - if issubclass(ParserElement._literalStringClass, Token): - expr = ParserElement._literalStringClass(expr) - else: - expr = ParserElement._literalStringClass(Literal(expr)) - self.expr = expr - self.strRepr = None - if expr is not None: - self.mayIndexError = expr.mayIndexError - self.mayReturnEmpty = expr.mayReturnEmpty - self.setWhitespaceChars( expr.whiteChars ) - self.skipWhitespace = expr.skipWhitespace - self.saveAsList = expr.saveAsList - self.callPreparse = expr.callPreparse - self.ignoreExprs.extend(expr.ignoreExprs) - - def parseImpl( self, instring, loc, doActions=True ): - if self.expr is not None: - return self.expr._parse( instring, loc, doActions, callPreParse=False ) - else: - raise ParseException("",loc,self.errmsg,self) - - def leaveWhitespace( self ): - self.skipWhitespace = False - self.expr = self.expr.copy() - if self.expr is not None: - self.expr.leaveWhitespace() - return self - - def ignore( self, other ): - if isinstance( other, Suppress ): - if other not in self.ignoreExprs: - super( ParseElementEnhance, self).ignore( other ) - if self.expr is not None: - self.expr.ignore( self.ignoreExprs[-1] ) - else: - super( ParseElementEnhance, self).ignore( other ) - if self.expr is not None: - self.expr.ignore( self.ignoreExprs[-1] ) - return self - - def streamline( self ): - super(ParseElementEnhance,self).streamline() - if self.expr is not None: - self.expr.streamline() - return self - - def checkRecursion( self, parseElementList ): - if self in parseElementList: - raise RecursiveGrammarException( parseElementList+[self] ) - subRecCheckList = parseElementList[:] + [ self ] - if self.expr is not None: - self.expr.checkRecursion( subRecCheckList ) - - def validate( self, validateTrace=[] ): - tmp = validateTrace[:]+[self] - if self.expr is not None: - self.expr.validate(tmp) - self.checkRecursion( [] ) - - def __str__( self ): - try: - return super(ParseElementEnhance,self).__str__() - except Exception: - pass - - if self.strRepr is None and self.expr is not None: - self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.expr) ) - return self.strRepr - - -class FollowedBy(ParseElementEnhance): - """ - Lookahead matching of the given parse expression. C{FollowedBy} - does I{not} advance the parsing position within the input string, it only - verifies that the specified parse expression matches at the current - position. C{FollowedBy} always returns a null token list. - - Example:: - # use FollowedBy to match a label only if it is followed by a ':' - data_word = Word(alphas) - label = data_word + FollowedBy(':') - attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)) - - OneOrMore(attr_expr).parseString("shape: SQUARE color: BLACK posn: upper left").pprint() - prints:: - [['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']] - """ - def __init__( self, expr ): - super(FollowedBy,self).__init__(expr) - self.mayReturnEmpty = True - - def parseImpl( self, instring, loc, doActions=True ): - self.expr.tryParse( instring, loc ) - return loc, [] - - -class NotAny(ParseElementEnhance): - """ - Lookahead to disallow matching with the given parse expression. C{NotAny} - does I{not} advance the parsing position within the input string, it only - verifies that the specified parse expression does I{not} match at the current - position. Also, C{NotAny} does I{not} skip over leading whitespace. C{NotAny} - always returns a null token list. May be constructed using the '~' operator. - - Example:: - - """ - def __init__( self, expr ): - super(NotAny,self).__init__(expr) - #~ self.leaveWhitespace() - self.skipWhitespace = False # do NOT use self.leaveWhitespace(), don't want to propagate to exprs - self.mayReturnEmpty = True - self.errmsg = "Found unwanted token, "+_ustr(self.expr) - - def parseImpl( self, instring, loc, doActions=True ): - if self.expr.canParseNext(instring, loc): - raise ParseException(instring, loc, self.errmsg, self) - return loc, [] - - def __str__( self ): - if hasattr(self,"name"): - return self.name - - if self.strRepr is None: - self.strRepr = "~{" + _ustr(self.expr) + "}" - - return self.strRepr - -class _MultipleMatch(ParseElementEnhance): - def __init__( self, expr, stopOn=None): - super(_MultipleMatch, self).__init__(expr) - self.saveAsList = True - ender = stopOn - if isinstance(ender, basestring): - ender = ParserElement._literalStringClass(ender) - self.not_ender = ~ender if ender is not None else None - - def parseImpl( self, instring, loc, doActions=True ): - self_expr_parse = self.expr._parse - self_skip_ignorables = self._skipIgnorables - check_ender = self.not_ender is not None - if check_ender: - try_not_ender = self.not_ender.tryParse - - # must be at least one (but first see if we are the stopOn sentinel; - # if so, fail) - if check_ender: - try_not_ender(instring, loc) - loc, tokens = self_expr_parse( instring, loc, doActions, callPreParse=False ) - try: - hasIgnoreExprs = (not not self.ignoreExprs) - while 1: - if check_ender: - try_not_ender(instring, loc) - if hasIgnoreExprs: - preloc = self_skip_ignorables( instring, loc ) - else: - preloc = loc - loc, tmptokens = self_expr_parse( instring, preloc, doActions ) - if tmptokens or tmptokens.haskeys(): - tokens += tmptokens - except (ParseException,IndexError): - pass - - return loc, tokens - -class OneOrMore(_MultipleMatch): - """ - Repetition of one or more of the given expression. - - Parameters: - - expr - expression that must match one or more times - - stopOn - (default=C{None}) - expression for a terminating sentinel - (only required if the sentinel would ordinarily match the repetition - expression) - - Example:: - data_word = Word(alphas) - label = data_word + FollowedBy(':') - attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join)) - - text = "shape: SQUARE posn: upper left color: BLACK" - OneOrMore(attr_expr).parseString(text).pprint() # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']] - - # use stopOn attribute for OneOrMore to avoid reading label string as part of the data - attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)) - OneOrMore(attr_expr).parseString(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']] - - # could also be written as - (attr_expr * (1,)).parseString(text).pprint() - """ - - def __str__( self ): - if hasattr(self,"name"): - return self.name - - if self.strRepr is None: - self.strRepr = "{" + _ustr(self.expr) + "}..." - - return self.strRepr - -class ZeroOrMore(_MultipleMatch): - """ - Optional repetition of zero or more of the given expression. - - Parameters: - - expr - expression that must match zero or more times - - stopOn - (default=C{None}) - expression for a terminating sentinel - (only required if the sentinel would ordinarily match the repetition - expression) - - Example: similar to L{OneOrMore} - """ - def __init__( self, expr, stopOn=None): - super(ZeroOrMore,self).__init__(expr, stopOn=stopOn) - self.mayReturnEmpty = True - - def parseImpl( self, instring, loc, doActions=True ): - try: - return super(ZeroOrMore, self).parseImpl(instring, loc, doActions) - except (ParseException,IndexError): - return loc, [] - - def __str__( self ): - if hasattr(self,"name"): - return self.name - - if self.strRepr is None: - self.strRepr = "[" + _ustr(self.expr) + "]..." - - return self.strRepr - -class _NullToken(object): - def __bool__(self): - return False - __nonzero__ = __bool__ - def __str__(self): - return "" - -_optionalNotMatched = _NullToken() -class Optional(ParseElementEnhance): - """ - Optional matching of the given expression. - - Parameters: - - expr - expression that must match zero or more times - - default (optional) - value to be returned if the optional expression is not found. - - Example:: - # US postal code can be a 5-digit zip, plus optional 4-digit qualifier - zip = Combine(Word(nums, exact=5) + Optional('-' + Word(nums, exact=4))) - zip.runTests(''' - # traditional ZIP code - 12345 - - # ZIP+4 form - 12101-0001 - - # invalid ZIP - 98765- - ''') - prints:: - # traditional ZIP code - 12345 - ['12345'] - - # ZIP+4 form - 12101-0001 - ['12101-0001'] - - # invalid ZIP - 98765- - ^ - FAIL: Expected end of text (at char 5), (line:1, col:6) - """ - def __init__( self, expr, default=_optionalNotMatched ): - super(Optional,self).__init__( expr, savelist=False ) - self.saveAsList = self.expr.saveAsList - self.defaultValue = default - self.mayReturnEmpty = True - - def parseImpl( self, instring, loc, doActions=True ): - try: - loc, tokens = self.expr._parse( instring, loc, doActions, callPreParse=False ) - except (ParseException,IndexError): - if self.defaultValue is not _optionalNotMatched: - if self.expr.resultsName: - tokens = ParseResults([ self.defaultValue ]) - tokens[self.expr.resultsName] = self.defaultValue - else: - tokens = [ self.defaultValue ] - else: - tokens = [] - return loc, tokens - - def __str__( self ): - if hasattr(self,"name"): - return self.name - - if self.strRepr is None: - self.strRepr = "[" + _ustr(self.expr) + "]" - - return self.strRepr - -class SkipTo(ParseElementEnhance): - """ - Token for skipping over all undefined text until the matched expression is found. - - Parameters: - - expr - target expression marking the end of the data to be skipped - - include - (default=C{False}) if True, the target expression is also parsed - (the skipped text and target expression are returned as a 2-element list). - - ignore - (default=C{None}) used to define grammars (typically quoted strings and - comments) that might contain false matches to the target expression - - failOn - (default=C{None}) define expressions that are not allowed to be - included in the skipped test; if found before the target expression is found, - the SkipTo is not a match - - Example:: - report = ''' - Outstanding Issues Report - 1 Jan 2000 - - # | Severity | Description | Days Open - -----+----------+-------------------------------------------+----------- - 101 | Critical | Intermittent system crash | 6 - 94 | Cosmetic | Spelling error on Login ('log|n') | 14 - 79 | Minor | System slow when running too many reports | 47 - ''' - integer = Word(nums) - SEP = Suppress('|') - # use SkipTo to simply match everything up until the next SEP - # - ignore quoted strings, so that a '|' character inside a quoted string does not match - # - parse action will call token.strip() for each matched token, i.e., the description body - string_data = SkipTo(SEP, ignore=quotedString) - string_data.setParseAction(tokenMap(str.strip)) - ticket_expr = (integer("issue_num") + SEP - + string_data("sev") + SEP - + string_data("desc") + SEP - + integer("days_open")) - - for tkt in ticket_expr.searchString(report): - print tkt.dump() - prints:: - ['101', 'Critical', 'Intermittent system crash', '6'] - - days_open: 6 - - desc: Intermittent system crash - - issue_num: 101 - - sev: Critical - ['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14'] - - days_open: 14 - - desc: Spelling error on Login ('log|n') - - issue_num: 94 - - sev: Cosmetic - ['79', 'Minor', 'System slow when running too many reports', '47'] - - days_open: 47 - - desc: System slow when running too many reports - - issue_num: 79 - - sev: Minor - """ - def __init__( self, other, include=False, ignore=None, failOn=None ): - super( SkipTo, self ).__init__( other ) - self.ignoreExpr = ignore - self.mayReturnEmpty = True - self.mayIndexError = False - self.includeMatch = include - self.asList = False - if isinstance(failOn, basestring): - self.failOn = ParserElement._literalStringClass(failOn) - else: - self.failOn = failOn - self.errmsg = "No match found for "+_ustr(self.expr) - - def parseImpl( self, instring, loc, doActions=True ): - startloc = loc - instrlen = len(instring) - expr = self.expr - expr_parse = self.expr._parse - self_failOn_canParseNext = self.failOn.canParseNext if self.failOn is not None else None - self_ignoreExpr_tryParse = self.ignoreExpr.tryParse if self.ignoreExpr is not None else None - - tmploc = loc - while tmploc <= instrlen: - if self_failOn_canParseNext is not None: - # break if failOn expression matches - if self_failOn_canParseNext(instring, tmploc): - break - - if self_ignoreExpr_tryParse is not None: - # advance past ignore expressions - while 1: - try: - tmploc = self_ignoreExpr_tryParse(instring, tmploc) - except ParseBaseException: - break - - try: - expr_parse(instring, tmploc, doActions=False, callPreParse=False) - except (ParseException, IndexError): - # no match, advance loc in string - tmploc += 1 - else: - # matched skipto expr, done - break - - else: - # ran off the end of the input string without matching skipto expr, fail - raise ParseException(instring, loc, self.errmsg, self) - - # build up return values - loc = tmploc - skiptext = instring[startloc:loc] - skipresult = ParseResults(skiptext) - - if self.includeMatch: - loc, mat = expr_parse(instring,loc,doActions,callPreParse=False) - skipresult += mat - - return loc, skipresult - -class Forward(ParseElementEnhance): - """ - Forward declaration of an expression to be defined later - - used for recursive grammars, such as algebraic infix notation. - When the expression is known, it is assigned to the C{Forward} variable using the '<<' operator. - - Note: take care when assigning to C{Forward} not to overlook precedence of operators. - Specifically, '|' has a lower precedence than '<<', so that:: - fwdExpr << a | b | c - will actually be evaluated as:: - (fwdExpr << a) | b | c - thereby leaving b and c out as parseable alternatives. It is recommended that you - explicitly group the values inserted into the C{Forward}:: - fwdExpr << (a | b | c) - Converting to use the '<<=' operator instead will avoid this problem. - - See L{ParseResults.pprint} for an example of a recursive parser created using - C{Forward}. - """ - def __init__( self, other=None ): - super(Forward,self).__init__( other, savelist=False ) - - def __lshift__( self, other ): - if isinstance( other, basestring ): - other = ParserElement._literalStringClass(other) - self.expr = other - self.strRepr = None - self.mayIndexError = self.expr.mayIndexError - self.mayReturnEmpty = self.expr.mayReturnEmpty - self.setWhitespaceChars( self.expr.whiteChars ) - self.skipWhitespace = self.expr.skipWhitespace - self.saveAsList = self.expr.saveAsList - self.ignoreExprs.extend(self.expr.ignoreExprs) - return self - - def __ilshift__(self, other): - return self << other - - def leaveWhitespace( self ): - self.skipWhitespace = False - return self - - def streamline( self ): - if not self.streamlined: - self.streamlined = True - if self.expr is not None: - self.expr.streamline() - return self - - def validate( self, validateTrace=[] ): - if self not in validateTrace: - tmp = validateTrace[:]+[self] - if self.expr is not None: - self.expr.validate(tmp) - self.checkRecursion([]) - - def __str__( self ): - if hasattr(self,"name"): - return self.name - return self.__class__.__name__ + ": ..." - - # stubbed out for now - creates awful memory and perf issues - self._revertClass = self.__class__ - self.__class__ = _ForwardNoRecurse - try: - if self.expr is not None: - retString = _ustr(self.expr) - else: - retString = "None" - finally: - self.__class__ = self._revertClass - return self.__class__.__name__ + ": " + retString - - def copy(self): - if self.expr is not None: - return super(Forward,self).copy() - else: - ret = Forward() - ret <<= self - return ret - -class _ForwardNoRecurse(Forward): - def __str__( self ): - return "..." - -class TokenConverter(ParseElementEnhance): - """ - Abstract subclass of C{ParseExpression}, for converting parsed results. - """ - def __init__( self, expr, savelist=False ): - super(TokenConverter,self).__init__( expr )#, savelist ) - self.saveAsList = False - -class Combine(TokenConverter): - """ - Converter to concatenate all matching tokens to a single string. - By default, the matching patterns must also be contiguous in the input string; - this can be disabled by specifying C{'adjacent=False'} in the constructor. - - Example:: - real = Word(nums) + '.' + Word(nums) - print(real.parseString('3.1416')) # -> ['3', '.', '1416'] - # will also erroneously match the following - print(real.parseString('3. 1416')) # -> ['3', '.', '1416'] - - real = Combine(Word(nums) + '.' + Word(nums)) - print(real.parseString('3.1416')) # -> ['3.1416'] - # no match when there are internal spaces - print(real.parseString('3. 1416')) # -> Exception: Expected W:(0123...) - """ - def __init__( self, expr, joinString="", adjacent=True ): - super(Combine,self).__init__( expr ) - # suppress whitespace-stripping in contained parse expressions, but re-enable it on the Combine itself - if adjacent: - self.leaveWhitespace() - self.adjacent = adjacent - self.skipWhitespace = True - self.joinString = joinString - self.callPreparse = True - - def ignore( self, other ): - if self.adjacent: - ParserElement.ignore(self, other) - else: - super( Combine, self).ignore( other ) - return self - - def postParse( self, instring, loc, tokenlist ): - retToks = tokenlist.copy() - del retToks[:] - retToks += ParseResults([ "".join(tokenlist._asStringList(self.joinString)) ], modal=self.modalResults) - - if self.resultsName and retToks.haskeys(): - return [ retToks ] - else: - return retToks - -class Group(TokenConverter): - """ - Converter to return the matched tokens as a list - useful for returning tokens of C{L{ZeroOrMore}} and C{L{OneOrMore}} expressions. - - Example:: - ident = Word(alphas) - num = Word(nums) - term = ident | num - func = ident + Optional(delimitedList(term)) - print(func.parseString("fn a,b,100")) # -> ['fn', 'a', 'b', '100'] - - func = ident + Group(Optional(delimitedList(term))) - print(func.parseString("fn a,b,100")) # -> ['fn', ['a', 'b', '100']] - """ - def __init__( self, expr ): - super(Group,self).__init__( expr ) - self.saveAsList = True - - def postParse( self, instring, loc, tokenlist ): - return [ tokenlist ] - -class Dict(TokenConverter): - """ - Converter to return a repetitive expression as a list, but also as a dictionary. - Each element can also be referenced using the first token in the expression as its key. - Useful for tabular report scraping when the first column can be used as a item key. - - Example:: - data_word = Word(alphas) - label = data_word + FollowedBy(':') - attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join)) - - text = "shape: SQUARE posn: upper left color: light blue texture: burlap" - attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)) - - # print attributes as plain groups - print(OneOrMore(attr_expr).parseString(text).dump()) - - # instead of OneOrMore(expr), parse using Dict(OneOrMore(Group(expr))) - Dict will auto-assign names - result = Dict(OneOrMore(Group(attr_expr))).parseString(text) - print(result.dump()) - - # access named fields as dict entries, or output as dict - print(result['shape']) - print(result.asDict()) - prints:: - ['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap'] - - [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']] - - color: light blue - - posn: upper left - - shape: SQUARE - - texture: burlap - SQUARE - {'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'} - See more examples at L{ParseResults} of accessing fields by results name. - """ - def __init__( self, expr ): - super(Dict,self).__init__( expr ) - self.saveAsList = True - - def postParse( self, instring, loc, tokenlist ): - for i,tok in enumerate(tokenlist): - if len(tok) == 0: - continue - ikey = tok[0] - if isinstance(ikey,int): - ikey = _ustr(tok[0]).strip() - if len(tok)==1: - tokenlist[ikey] = _ParseResultsWithOffset("",i) - elif len(tok)==2 and not isinstance(tok[1],ParseResults): - tokenlist[ikey] = _ParseResultsWithOffset(tok[1],i) - else: - dictvalue = tok.copy() #ParseResults(i) - del dictvalue[0] - if len(dictvalue)!= 1 or (isinstance(dictvalue,ParseResults) and dictvalue.haskeys()): - tokenlist[ikey] = _ParseResultsWithOffset(dictvalue,i) - else: - tokenlist[ikey] = _ParseResultsWithOffset(dictvalue[0],i) - - if self.resultsName: - return [ tokenlist ] - else: - return tokenlist - - -class Suppress(TokenConverter): - """ - Converter for ignoring the results of a parsed expression. - - Example:: - source = "a, b, c,d" - wd = Word(alphas) - wd_list1 = wd + ZeroOrMore(',' + wd) - print(wd_list1.parseString(source)) - - # often, delimiters that are useful during parsing are just in the - # way afterward - use Suppress to keep them out of the parsed output - wd_list2 = wd + ZeroOrMore(Suppress(',') + wd) - print(wd_list2.parseString(source)) - prints:: - ['a', ',', 'b', ',', 'c', ',', 'd'] - ['a', 'b', 'c', 'd'] - (See also L{delimitedList}.) - """ - def postParse( self, instring, loc, tokenlist ): - return [] - - def suppress( self ): - return self - - -class OnlyOnce(object): - """ - Wrapper for parse actions, to ensure they are only called once. - """ - def __init__(self, methodCall): - self.callable = _trim_arity(methodCall) - self.called = False - def __call__(self,s,l,t): - if not self.called: - results = self.callable(s,l,t) - self.called = True - return results - raise ParseException(s,l,"") - def reset(self): - self.called = False - -def traceParseAction(f): - """ - Decorator for debugging parse actions. - - When the parse action is called, this decorator will print C{">> entering I{method-name}(line:I{current_source_line}, I{parse_location}, I{matched_tokens})".} - When the parse action completes, the decorator will print C{"<<"} followed by the returned value, or any exception that the parse action raised. - - Example:: - wd = Word(alphas) - - @traceParseAction - def remove_duplicate_chars(tokens): - return ''.join(sorted(set(''.join(tokens)))) - - wds = OneOrMore(wd).setParseAction(remove_duplicate_chars) - print(wds.parseString("slkdjs sld sldd sdlf sdljf")) - prints:: - >>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {})) - <3: - thisFunc = paArgs[0].__class__.__name__ + '.' + thisFunc - sys.stderr.write( ">>entering %s(line: '%s', %d, %r)\n" % (thisFunc,line(l,s),l,t) ) - try: - ret = f(*paArgs) - except Exception as exc: - sys.stderr.write( "< ['aa', 'bb', 'cc'] - delimitedList(Word(hexnums), delim=':', combine=True).parseString("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE'] - """ - dlName = _ustr(expr)+" ["+_ustr(delim)+" "+_ustr(expr)+"]..." - if combine: - return Combine( expr + ZeroOrMore( delim + expr ) ).setName(dlName) - else: - return ( expr + ZeroOrMore( Suppress( delim ) + expr ) ).setName(dlName) - -def countedArray( expr, intExpr=None ): - """ - Helper to define a counted list of expressions. - This helper defines a pattern of the form:: - integer expr expr expr... - where the leading integer tells how many expr expressions follow. - The matched tokens returns the array of expr tokens as a list - the leading count token is suppressed. - - If C{intExpr} is specified, it should be a pyparsing expression that produces an integer value. - - Example:: - countedArray(Word(alphas)).parseString('2 ab cd ef') # -> ['ab', 'cd'] - - # in this parser, the leading integer value is given in binary, - # '10' indicating that 2 values are in the array - binaryConstant = Word('01').setParseAction(lambda t: int(t[0], 2)) - countedArray(Word(alphas), intExpr=binaryConstant).parseString('10 ab cd ef') # -> ['ab', 'cd'] - """ - arrayExpr = Forward() - def countFieldParseAction(s,l,t): - n = t[0] - arrayExpr << (n and Group(And([expr]*n)) or Group(empty)) - return [] - if intExpr is None: - intExpr = Word(nums).setParseAction(lambda t:int(t[0])) - else: - intExpr = intExpr.copy() - intExpr.setName("arrayLen") - intExpr.addParseAction(countFieldParseAction, callDuringTry=True) - return ( intExpr + arrayExpr ).setName('(len) ' + _ustr(expr) + '...') - -def _flatten(L): - ret = [] - for i in L: - if isinstance(i,list): - ret.extend(_flatten(i)) - else: - ret.append(i) - return ret - -def matchPreviousLiteral(expr): - """ - Helper to define an expression that is indirectly defined from - the tokens matched in a previous expression, that is, it looks - for a 'repeat' of a previous expression. For example:: - first = Word(nums) - second = matchPreviousLiteral(first) - matchExpr = first + ":" + second - will match C{"1:1"}, but not C{"1:2"}. Because this matches a - previous literal, will also match the leading C{"1:1"} in C{"1:10"}. - If this is not desired, use C{matchPreviousExpr}. - Do I{not} use with packrat parsing enabled. - """ - rep = Forward() - def copyTokenToRepeater(s,l,t): - if t: - if len(t) == 1: - rep << t[0] - else: - # flatten t tokens - tflat = _flatten(t.asList()) - rep << And(Literal(tt) for tt in tflat) - else: - rep << Empty() - expr.addParseAction(copyTokenToRepeater, callDuringTry=True) - rep.setName('(prev) ' + _ustr(expr)) - return rep - -def matchPreviousExpr(expr): - """ - Helper to define an expression that is indirectly defined from - the tokens matched in a previous expression, that is, it looks - for a 'repeat' of a previous expression. For example:: - first = Word(nums) - second = matchPreviousExpr(first) - matchExpr = first + ":" + second - will match C{"1:1"}, but not C{"1:2"}. Because this matches by - expressions, will I{not} match the leading C{"1:1"} in C{"1:10"}; - the expressions are evaluated first, and then compared, so - C{"1"} is compared with C{"10"}. - Do I{not} use with packrat parsing enabled. - """ - rep = Forward() - e2 = expr.copy() - rep <<= e2 - def copyTokenToRepeater(s,l,t): - matchTokens = _flatten(t.asList()) - def mustMatchTheseTokens(s,l,t): - theseTokens = _flatten(t.asList()) - if theseTokens != matchTokens: - raise ParseException("",0,"") - rep.setParseAction( mustMatchTheseTokens, callDuringTry=True ) - expr.addParseAction(copyTokenToRepeater, callDuringTry=True) - rep.setName('(prev) ' + _ustr(expr)) - return rep - -def _escapeRegexRangeChars(s): - #~ escape these chars: ^-] - for c in r"\^-]": - s = s.replace(c,_bslash+c) - s = s.replace("\n",r"\n") - s = s.replace("\t",r"\t") - return _ustr(s) - -def oneOf( strs, caseless=False, useRegex=True ): - """ - Helper to quickly define a set of alternative Literals, and makes sure to do - longest-first testing when there is a conflict, regardless of the input order, - but returns a C{L{MatchFirst}} for best performance. - - Parameters: - - strs - a string of space-delimited literals, or a collection of string literals - - caseless - (default=C{False}) - treat all literals as caseless - - useRegex - (default=C{True}) - as an optimization, will generate a Regex - object; otherwise, will generate a C{MatchFirst} object (if C{caseless=True}, or - if creating a C{Regex} raises an exception) - - Example:: - comp_oper = oneOf("< = > <= >= !=") - var = Word(alphas) - number = Word(nums) - term = var | number - comparison_expr = term + comp_oper + term - print(comparison_expr.searchString("B = 12 AA=23 B<=AA AA>12")) - prints:: - [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']] - """ - if caseless: - isequal = ( lambda a,b: a.upper() == b.upper() ) - masks = ( lambda a,b: b.upper().startswith(a.upper()) ) - parseElementClass = CaselessLiteral - else: - isequal = ( lambda a,b: a == b ) - masks = ( lambda a,b: b.startswith(a) ) - parseElementClass = Literal - - symbols = [] - if isinstance(strs,basestring): - symbols = strs.split() - elif isinstance(strs, Iterable): - symbols = list(strs) - else: - warnings.warn("Invalid argument to oneOf, expected string or iterable", - SyntaxWarning, stacklevel=2) - if not symbols: - return NoMatch() - - i = 0 - while i < len(symbols)-1: - cur = symbols[i] - for j,other in enumerate(symbols[i+1:]): - if ( isequal(other, cur) ): - del symbols[i+j+1] - break - elif ( masks(cur, other) ): - del symbols[i+j+1] - symbols.insert(i,other) - cur = other - break - else: - i += 1 - - if not caseless and useRegex: - #~ print (strs,"->", "|".join( [ _escapeRegexChars(sym) for sym in symbols] )) - try: - if len(symbols)==len("".join(symbols)): - return Regex( "[%s]" % "".join(_escapeRegexRangeChars(sym) for sym in symbols) ).setName(' | '.join(symbols)) - else: - return Regex( "|".join(re.escape(sym) for sym in symbols) ).setName(' | '.join(symbols)) - except Exception: - warnings.warn("Exception creating Regex for oneOf, building MatchFirst", - SyntaxWarning, stacklevel=2) - - - # last resort, just use MatchFirst - return MatchFirst(parseElementClass(sym) for sym in symbols).setName(' | '.join(symbols)) - -def dictOf( key, value ): - """ - Helper to easily and clearly define a dictionary by specifying the respective patterns - for the key and value. Takes care of defining the C{L{Dict}}, C{L{ZeroOrMore}}, and C{L{Group}} tokens - in the proper order. The key pattern can include delimiting markers or punctuation, - as long as they are suppressed, thereby leaving the significant key text. The value - pattern can include named results, so that the C{Dict} results can include named token - fields. - - Example:: - text = "shape: SQUARE posn: upper left color: light blue texture: burlap" - attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)) - print(OneOrMore(attr_expr).parseString(text).dump()) - - attr_label = label - attr_value = Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join) - - # similar to Dict, but simpler call format - result = dictOf(attr_label, attr_value).parseString(text) - print(result.dump()) - print(result['shape']) - print(result.shape) # object attribute access works too - print(result.asDict()) - prints:: - [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']] - - color: light blue - - posn: upper left - - shape: SQUARE - - texture: burlap - SQUARE - SQUARE - {'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'} - """ - return Dict( ZeroOrMore( Group ( key + value ) ) ) - -def originalTextFor(expr, asString=True): - """ - Helper to return the original, untokenized text for a given expression. Useful to - restore the parsed fields of an HTML start tag into the raw tag text itself, or to - revert separate tokens with intervening whitespace back to the original matching - input text. By default, returns astring containing the original parsed text. - - If the optional C{asString} argument is passed as C{False}, then the return value is a - C{L{ParseResults}} containing any results names that were originally matched, and a - single token containing the original matched text from the input string. So if - the expression passed to C{L{originalTextFor}} contains expressions with defined - results names, you must set C{asString} to C{False} if you want to preserve those - results name values. - - Example:: - src = "this is test bold text normal text " - for tag in ("b","i"): - opener,closer = makeHTMLTags(tag) - patt = originalTextFor(opener + SkipTo(closer) + closer) - print(patt.searchString(src)[0]) - prints:: - [' bold text '] - ['text'] - """ - locMarker = Empty().setParseAction(lambda s,loc,t: loc) - endlocMarker = locMarker.copy() - endlocMarker.callPreparse = False - matchExpr = locMarker("_original_start") + expr + endlocMarker("_original_end") - if asString: - extractText = lambda s,l,t: s[t._original_start:t._original_end] - else: - def extractText(s,l,t): - t[:] = [s[t.pop('_original_start'):t.pop('_original_end')]] - matchExpr.setParseAction(extractText) - matchExpr.ignoreExprs = expr.ignoreExprs - return matchExpr - -def ungroup(expr): - """ - Helper to undo pyparsing's default grouping of And expressions, even - if all but one are non-empty. - """ - return TokenConverter(expr).setParseAction(lambda t:t[0]) - -def locatedExpr(expr): - """ - Helper to decorate a returned token with its starting and ending locations in the input string. - This helper adds the following results names: - - locn_start = location where matched expression begins - - locn_end = location where matched expression ends - - value = the actual parsed results - - Be careful if the input text contains C{} characters, you may want to call - C{L{ParserElement.parseWithTabs}} - - Example:: - wd = Word(alphas) - for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"): - print(match) - prints:: - [[0, 'ljsdf', 5]] - [[8, 'lksdjjf', 15]] - [[18, 'lkkjj', 23]] - """ - locator = Empty().setParseAction(lambda s,l,t: l) - return Group(locator("locn_start") + expr("value") + locator.copy().leaveWhitespace()("locn_end")) - - -# convenience constants for positional expressions -empty = Empty().setName("empty") -lineStart = LineStart().setName("lineStart") -lineEnd = LineEnd().setName("lineEnd") -stringStart = StringStart().setName("stringStart") -stringEnd = StringEnd().setName("stringEnd") - -_escapedPunc = Word( _bslash, r"\[]-*.$+^?()~ ", exact=2 ).setParseAction(lambda s,l,t:t[0][1]) -_escapedHexChar = Regex(r"\\0?[xX][0-9a-fA-F]+").setParseAction(lambda s,l,t:unichr(int(t[0].lstrip(r'\0x'),16))) -_escapedOctChar = Regex(r"\\0[0-7]+").setParseAction(lambda s,l,t:unichr(int(t[0][1:],8))) -_singleChar = _escapedPunc | _escapedHexChar | _escapedOctChar | CharsNotIn(r'\]', exact=1) -_charRange = Group(_singleChar + Suppress("-") + _singleChar) -_reBracketExpr = Literal("[") + Optional("^").setResultsName("negate") + Group( OneOrMore( _charRange | _singleChar ) ).setResultsName("body") + "]" - -def srange(s): - r""" - Helper to easily define string ranges for use in Word construction. Borrows - syntax from regexp '[]' string range definitions:: - srange("[0-9]") -> "0123456789" - srange("[a-z]") -> "abcdefghijklmnopqrstuvwxyz" - srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_" - The input string must be enclosed in []'s, and the returned string is the expanded - character set joined into a single string. - The values enclosed in the []'s may be: - - a single character - - an escaped character with a leading backslash (such as C{\-} or C{\]}) - - an escaped hex character with a leading C{'\x'} (C{\x21}, which is a C{'!'} character) - (C{\0x##} is also supported for backwards compatibility) - - an escaped octal character with a leading C{'\0'} (C{\041}, which is a C{'!'} character) - - a range of any of the above, separated by a dash (C{'a-z'}, etc.) - - any combination of the above (C{'aeiouy'}, C{'a-zA-Z0-9_$'}, etc.) - """ - _expanded = lambda p: p if not isinstance(p,ParseResults) else ''.join(unichr(c) for c in range(ord(p[0]),ord(p[1])+1)) - try: - return "".join(_expanded(part) for part in _reBracketExpr.parseString(s).body) - except Exception: - return "" - -def matchOnlyAtCol(n): - """ - Helper method for defining parse actions that require matching at a specific - column in the input text. - """ - def verifyCol(strg,locn,toks): - if col(locn,strg) != n: - raise ParseException(strg,locn,"matched token not at column %d" % n) - return verifyCol - -def replaceWith(replStr): - """ - Helper method for common parse actions that simply return a literal value. Especially - useful when used with C{L{transformString}()}. - - Example:: - num = Word(nums).setParseAction(lambda toks: int(toks[0])) - na = oneOf("N/A NA").setParseAction(replaceWith(math.nan)) - term = na | num - - OneOrMore(term).parseString("324 234 N/A 234") # -> [324, 234, nan, 234] - """ - return lambda s,l,t: [replStr] - -def removeQuotes(s,l,t): - """ - Helper parse action for removing quotation marks from parsed quoted strings. - - Example:: - # by default, quotation marks are included in parsed results - quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"] - - # use removeQuotes to strip quotation marks from parsed results - quotedString.setParseAction(removeQuotes) - quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"] - """ - return t[0][1:-1] - -def tokenMap(func, *args): - """ - Helper to define a parse action by mapping a function to all elements of a ParseResults list.If any additional - args are passed, they are forwarded to the given function as additional arguments after - the token, as in C{hex_integer = Word(hexnums).setParseAction(tokenMap(int, 16))}, which will convert the - parsed data to an integer using base 16. - - Example (compare the last to example in L{ParserElement.transformString}:: - hex_ints = OneOrMore(Word(hexnums)).setParseAction(tokenMap(int, 16)) - hex_ints.runTests(''' - 00 11 22 aa FF 0a 0d 1a - ''') - - upperword = Word(alphas).setParseAction(tokenMap(str.upper)) - OneOrMore(upperword).runTests(''' - my kingdom for a horse - ''') - - wd = Word(alphas).setParseAction(tokenMap(str.title)) - OneOrMore(wd).setParseAction(' '.join).runTests(''' - now is the winter of our discontent made glorious summer by this sun of york - ''') - prints:: - 00 11 22 aa FF 0a 0d 1a - [0, 17, 34, 170, 255, 10, 13, 26] - - my kingdom for a horse - ['MY', 'KINGDOM', 'FOR', 'A', 'HORSE'] - - now is the winter of our discontent made glorious summer by this sun of york - ['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York'] - """ - def pa(s,l,t): - return [func(tokn, *args) for tokn in t] - - try: - func_name = getattr(func, '__name__', - getattr(func, '__class__').__name__) - except Exception: - func_name = str(func) - pa.__name__ = func_name - - return pa - -upcaseTokens = tokenMap(lambda t: _ustr(t).upper()) -"""(Deprecated) Helper parse action to convert tokens to upper case. Deprecated in favor of L{pyparsing_common.upcaseTokens}""" - -downcaseTokens = tokenMap(lambda t: _ustr(t).lower()) -"""(Deprecated) Helper parse action to convert tokens to lower case. Deprecated in favor of L{pyparsing_common.downcaseTokens}""" - -def _makeTags(tagStr, xml): - """Internal helper to construct opening and closing tag expressions, given a tag name""" - if isinstance(tagStr,basestring): - resname = tagStr - tagStr = Keyword(tagStr, caseless=not xml) - else: - resname = tagStr.name - - tagAttrName = Word(alphas,alphanums+"_-:") - if (xml): - tagAttrValue = dblQuotedString.copy().setParseAction( removeQuotes ) - openTag = Suppress("<") + tagStr("tag") + \ - Dict(ZeroOrMore(Group( tagAttrName + Suppress("=") + tagAttrValue ))) + \ - Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">") - else: - printablesLessRAbrack = "".join(c for c in printables if c not in ">") - tagAttrValue = quotedString.copy().setParseAction( removeQuotes ) | Word(printablesLessRAbrack) - openTag = Suppress("<") + tagStr("tag") + \ - Dict(ZeroOrMore(Group( tagAttrName.setParseAction(downcaseTokens) + \ - Optional( Suppress("=") + tagAttrValue ) ))) + \ - Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">") - closeTag = Combine(_L("") - - openTag = openTag.setResultsName("start"+"".join(resname.replace(":"," ").title().split())).setName("<%s>" % resname) - closeTag = closeTag.setResultsName("end"+"".join(resname.replace(":"," ").title().split())).setName("" % resname) - openTag.tag = resname - closeTag.tag = resname - return openTag, closeTag - -def makeHTMLTags(tagStr): - """ - Helper to construct opening and closing tag expressions for HTML, given a tag name. Matches - tags in either upper or lower case, attributes with namespaces and with quoted or unquoted values. - - Example:: - text = 'More info at the pyparsing wiki page' - # makeHTMLTags returns pyparsing expressions for the opening and closing tags as a 2-tuple - a,a_end = makeHTMLTags("A") - link_expr = a + SkipTo(a_end)("link_text") + a_end - - for link in link_expr.searchString(text): - # attributes in the tag (like "href" shown here) are also accessible as named results - print(link.link_text, '->', link.href) - prints:: - pyparsing -> http://pyparsing.wikispaces.com - """ - return _makeTags( tagStr, False ) - -def makeXMLTags(tagStr): - """ - Helper to construct opening and closing tag expressions for XML, given a tag name. Matches - tags only in the given upper/lower case. - - Example: similar to L{makeHTMLTags} - """ - return _makeTags( tagStr, True ) - -def withAttribute(*args,**attrDict): - """ - Helper to create a validating parse action to be used with start tags created - with C{L{makeXMLTags}} or C{L{makeHTMLTags}}. Use C{withAttribute} to qualify a starting tag - with a required attribute value, to avoid false matches on common tags such as - C{} or C{
}. - - Call C{withAttribute} with a series of attribute names and values. Specify the list - of filter attributes names and values as: - - keyword arguments, as in C{(align="right")}, or - - as an explicit dict with C{**} operator, when an attribute name is also a Python - reserved word, as in C{**{"class":"Customer", "align":"right"}} - - a list of name-value tuples, as in ( ("ns1:class", "Customer"), ("ns2:align","right") ) - For attribute names with a namespace prefix, you must use the second form. Attribute - names are matched insensitive to upper/lower case. - - If just testing for C{class} (with or without a namespace), use C{L{withClass}}. - - To verify that the attribute exists, but without specifying a value, pass - C{withAttribute.ANY_VALUE} as the value. - - Example:: - html = ''' -
- Some text -
1 4 0 1 0
-
1,3 2,3 1,1
-
this has no type
-
- - ''' - div,div_end = makeHTMLTags("div") - - # only match div tag having a type attribute with value "grid" - div_grid = div().setParseAction(withAttribute(type="grid")) - grid_expr = div_grid + SkipTo(div | div_end)("body") - for grid_header in grid_expr.searchString(html): - print(grid_header.body) - - # construct a match with any div tag having a type attribute, regardless of the value - div_any_type = div().setParseAction(withAttribute(type=withAttribute.ANY_VALUE)) - div_expr = div_any_type + SkipTo(div | div_end)("body") - for div_header in div_expr.searchString(html): - print(div_header.body) - prints:: - 1 4 0 1 0 - - 1 4 0 1 0 - 1,3 2,3 1,1 - """ - if args: - attrs = args[:] - else: - attrs = attrDict.items() - attrs = [(k,v) for k,v in attrs] - def pa(s,l,tokens): - for attrName,attrValue in attrs: - if attrName not in tokens: - raise ParseException(s,l,"no matching attribute " + attrName) - if attrValue != withAttribute.ANY_VALUE and tokens[attrName] != attrValue: - raise ParseException(s,l,"attribute '%s' has value '%s', must be '%s'" % - (attrName, tokens[attrName], attrValue)) - return pa -withAttribute.ANY_VALUE = object() - -def withClass(classname, namespace=''): - """ - Simplified version of C{L{withAttribute}} when matching on a div class - made - difficult because C{class} is a reserved word in Python. - - Example:: - html = ''' -
- Some text -
1 4 0 1 0
-
1,3 2,3 1,1
-
this <div> has no class
-
- - ''' - div,div_end = makeHTMLTags("div") - div_grid = div().setParseAction(withClass("grid")) - - grid_expr = div_grid + SkipTo(div | div_end)("body") - for grid_header in grid_expr.searchString(html): - print(grid_header.body) - - div_any_type = div().setParseAction(withClass(withAttribute.ANY_VALUE)) - div_expr = div_any_type + SkipTo(div | div_end)("body") - for div_header in div_expr.searchString(html): - print(div_header.body) - prints:: - 1 4 0 1 0 - - 1 4 0 1 0 - 1,3 2,3 1,1 - """ - classattr = "%s:class" % namespace if namespace else "class" - return withAttribute(**{classattr : classname}) - -opAssoc = _Constants() -opAssoc.LEFT = object() -opAssoc.RIGHT = object() - -def infixNotation( baseExpr, opList, lpar=Suppress('('), rpar=Suppress(')') ): - """ - Helper method for constructing grammars of expressions made up of - operators working in a precedence hierarchy. Operators may be unary or - binary, left- or right-associative. Parse actions can also be attached - to operator expressions. The generated parser will also recognize the use - of parentheses to override operator precedences (see example below). - - Note: if you define a deep operator list, you may see performance issues - when using infixNotation. See L{ParserElement.enablePackrat} for a - mechanism to potentially improve your parser performance. - - Parameters: - - baseExpr - expression representing the most basic element for the nested - - opList - list of tuples, one for each operator precedence level in the - expression grammar; each tuple is of the form - (opExpr, numTerms, rightLeftAssoc, parseAction), where: - - opExpr is the pyparsing expression for the operator; - may also be a string, which will be converted to a Literal; - if numTerms is 3, opExpr is a tuple of two expressions, for the - two operators separating the 3 terms - - numTerms is the number of terms for this operator (must - be 1, 2, or 3) - - rightLeftAssoc is the indicator whether the operator is - right or left associative, using the pyparsing-defined - constants C{opAssoc.RIGHT} and C{opAssoc.LEFT}. - - parseAction is the parse action to be associated with - expressions matching this operator expression (the - parse action tuple member may be omitted); if the parse action - is passed a tuple or list of functions, this is equivalent to - calling C{setParseAction(*fn)} (L{ParserElement.setParseAction}) - - lpar - expression for matching left-parentheses (default=C{Suppress('(')}) - - rpar - expression for matching right-parentheses (default=C{Suppress(')')}) - - Example:: - # simple example of four-function arithmetic with ints and variable names - integer = pyparsing_common.signed_integer - varname = pyparsing_common.identifier - - arith_expr = infixNotation(integer | varname, - [ - ('-', 1, opAssoc.RIGHT), - (oneOf('* /'), 2, opAssoc.LEFT), - (oneOf('+ -'), 2, opAssoc.LEFT), - ]) - - arith_expr.runTests(''' - 5+3*6 - (5+3)*6 - -2--11 - ''', fullDump=False) - prints:: - 5+3*6 - [[5, '+', [3, '*', 6]]] - - (5+3)*6 - [[[5, '+', 3], '*', 6]] - - -2--11 - [[['-', 2], '-', ['-', 11]]] - """ - ret = Forward() - lastExpr = baseExpr | ( lpar + ret + rpar ) - for i,operDef in enumerate(opList): - opExpr,arity,rightLeftAssoc,pa = (operDef + (None,))[:4] - termName = "%s term" % opExpr if arity < 3 else "%s%s term" % opExpr - if arity == 3: - if opExpr is None or len(opExpr) != 2: - raise ValueError("if numterms=3, opExpr must be a tuple or list of two expressions") - opExpr1, opExpr2 = opExpr - thisExpr = Forward().setName(termName) - if rightLeftAssoc == opAssoc.LEFT: - if arity == 1: - matchExpr = FollowedBy(lastExpr + opExpr) + Group( lastExpr + OneOrMore( opExpr ) ) - elif arity == 2: - if opExpr is not None: - matchExpr = FollowedBy(lastExpr + opExpr + lastExpr) + Group( lastExpr + OneOrMore( opExpr + lastExpr ) ) - else: - matchExpr = FollowedBy(lastExpr+lastExpr) + Group( lastExpr + OneOrMore(lastExpr) ) - elif arity == 3: - matchExpr = FollowedBy(lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr) + \ - Group( lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr ) - else: - raise ValueError("operator must be unary (1), binary (2), or ternary (3)") - elif rightLeftAssoc == opAssoc.RIGHT: - if arity == 1: - # try to avoid LR with this extra test - if not isinstance(opExpr, Optional): - opExpr = Optional(opExpr) - matchExpr = FollowedBy(opExpr.expr + thisExpr) + Group( opExpr + thisExpr ) - elif arity == 2: - if opExpr is not None: - matchExpr = FollowedBy(lastExpr + opExpr + thisExpr) + Group( lastExpr + OneOrMore( opExpr + thisExpr ) ) - else: - matchExpr = FollowedBy(lastExpr + thisExpr) + Group( lastExpr + OneOrMore( thisExpr ) ) - elif arity == 3: - matchExpr = FollowedBy(lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr) + \ - Group( lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr ) - else: - raise ValueError("operator must be unary (1), binary (2), or ternary (3)") - else: - raise ValueError("operator must indicate right or left associativity") - if pa: - if isinstance(pa, (tuple, list)): - matchExpr.setParseAction(*pa) - else: - matchExpr.setParseAction(pa) - thisExpr <<= ( matchExpr.setName(termName) | lastExpr ) - lastExpr = thisExpr - ret <<= lastExpr - return ret - -operatorPrecedence = infixNotation -"""(Deprecated) Former name of C{L{infixNotation}}, will be dropped in a future release.""" - -dblQuotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"').setName("string enclosed in double quotes") -sglQuotedString = Combine(Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("string enclosed in single quotes") -quotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"'| - Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("quotedString using single or double quotes") -unicodeString = Combine(_L('u') + quotedString.copy()).setName("unicode string literal") - -def nestedExpr(opener="(", closer=")", content=None, ignoreExpr=quotedString.copy()): - """ - Helper method for defining nested lists enclosed in opening and closing - delimiters ("(" and ")" are the default). - - Parameters: - - opener - opening character for a nested list (default=C{"("}); can also be a pyparsing expression - - closer - closing character for a nested list (default=C{")"}); can also be a pyparsing expression - - content - expression for items within the nested lists (default=C{None}) - - ignoreExpr - expression for ignoring opening and closing delimiters (default=C{quotedString}) - - If an expression is not provided for the content argument, the nested - expression will capture all whitespace-delimited content between delimiters - as a list of separate values. - - Use the C{ignoreExpr} argument to define expressions that may contain - opening or closing characters that should not be treated as opening - or closing characters for nesting, such as quotedString or a comment - expression. Specify multiple expressions using an C{L{Or}} or C{L{MatchFirst}}. - The default is L{quotedString}, but if no expressions are to be ignored, - then pass C{None} for this argument. - - Example:: - data_type = oneOf("void int short long char float double") - decl_data_type = Combine(data_type + Optional(Word('*'))) - ident = Word(alphas+'_', alphanums+'_') - number = pyparsing_common.number - arg = Group(decl_data_type + ident) - LPAR,RPAR = map(Suppress, "()") - - code_body = nestedExpr('{', '}', ignoreExpr=(quotedString | cStyleComment)) - - c_function = (decl_data_type("type") - + ident("name") - + LPAR + Optional(delimitedList(arg), [])("args") + RPAR - + code_body("body")) - c_function.ignore(cStyleComment) - - source_code = ''' - int is_odd(int x) { - return (x%2); - } - - int dec_to_hex(char hchar) { - if (hchar >= '0' && hchar <= '9') { - return (ord(hchar)-ord('0')); - } else { - return (10+ord(hchar)-ord('A')); - } - } - ''' - for func in c_function.searchString(source_code): - print("%(name)s (%(type)s) args: %(args)s" % func) - - prints:: - is_odd (int) args: [['int', 'x']] - dec_to_hex (int) args: [['char', 'hchar']] - """ - if opener == closer: - raise ValueError("opening and closing strings cannot be the same") - if content is None: - if isinstance(opener,basestring) and isinstance(closer,basestring): - if len(opener) == 1 and len(closer)==1: - if ignoreExpr is not None: - content = (Combine(OneOrMore(~ignoreExpr + - CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS,exact=1)) - ).setParseAction(lambda t:t[0].strip())) - else: - content = (empty.copy()+CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS - ).setParseAction(lambda t:t[0].strip())) - else: - if ignoreExpr is not None: - content = (Combine(OneOrMore(~ignoreExpr + - ~Literal(opener) + ~Literal(closer) + - CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1)) - ).setParseAction(lambda t:t[0].strip())) - else: - content = (Combine(OneOrMore(~Literal(opener) + ~Literal(closer) + - CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1)) - ).setParseAction(lambda t:t[0].strip())) - else: - raise ValueError("opening and closing arguments must be strings if no content expression is given") - ret = Forward() - if ignoreExpr is not None: - ret <<= Group( Suppress(opener) + ZeroOrMore( ignoreExpr | ret | content ) + Suppress(closer) ) - else: - ret <<= Group( Suppress(opener) + ZeroOrMore( ret | content ) + Suppress(closer) ) - ret.setName('nested %s%s expression' % (opener,closer)) - return ret - -def indentedBlock(blockStatementExpr, indentStack, indent=True): - """ - Helper method for defining space-delimited indentation blocks, such as - those used to define block statements in Python source code. - - Parameters: - - blockStatementExpr - expression defining syntax of statement that - is repeated within the indented block - - indentStack - list created by caller to manage indentation stack - (multiple statementWithIndentedBlock expressions within a single grammar - should share a common indentStack) - - indent - boolean indicating whether block must be indented beyond the - the current level; set to False for block of left-most statements - (default=C{True}) - - A valid block must contain at least one C{blockStatement}. - - Example:: - data = ''' - def A(z): - A1 - B = 100 - G = A2 - A2 - A3 - B - def BB(a,b,c): - BB1 - def BBA(): - bba1 - bba2 - bba3 - C - D - def spam(x,y): - def eggs(z): - pass - ''' - - - indentStack = [1] - stmt = Forward() - - identifier = Word(alphas, alphanums) - funcDecl = ("def" + identifier + Group( "(" + Optional( delimitedList(identifier) ) + ")" ) + ":") - func_body = indentedBlock(stmt, indentStack) - funcDef = Group( funcDecl + func_body ) - - rvalue = Forward() - funcCall = Group(identifier + "(" + Optional(delimitedList(rvalue)) + ")") - rvalue << (funcCall | identifier | Word(nums)) - assignment = Group(identifier + "=" + rvalue) - stmt << ( funcDef | assignment | identifier ) - - module_body = OneOrMore(stmt) - - parseTree = module_body.parseString(data) - parseTree.pprint() - prints:: - [['def', - 'A', - ['(', 'z', ')'], - ':', - [['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]], - 'B', - ['def', - 'BB', - ['(', 'a', 'b', 'c', ')'], - ':', - [['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]], - 'C', - 'D', - ['def', - 'spam', - ['(', 'x', 'y', ')'], - ':', - [[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]] - """ - def checkPeerIndent(s,l,t): - if l >= len(s): return - curCol = col(l,s) - if curCol != indentStack[-1]: - if curCol > indentStack[-1]: - raise ParseFatalException(s,l,"illegal nesting") - raise ParseException(s,l,"not a peer entry") - - def checkSubIndent(s,l,t): - curCol = col(l,s) - if curCol > indentStack[-1]: - indentStack.append( curCol ) - else: - raise ParseException(s,l,"not a subentry") - - def checkUnindent(s,l,t): - if l >= len(s): return - curCol = col(l,s) - if not(indentStack and curCol < indentStack[-1] and curCol <= indentStack[-2]): - raise ParseException(s,l,"not an unindent") - indentStack.pop() - - NL = OneOrMore(LineEnd().setWhitespaceChars("\t ").suppress()) - INDENT = (Empty() + Empty().setParseAction(checkSubIndent)).setName('INDENT') - PEER = Empty().setParseAction(checkPeerIndent).setName('') - UNDENT = Empty().setParseAction(checkUnindent).setName('UNINDENT') - if indent: - smExpr = Group( Optional(NL) + - #~ FollowedBy(blockStatementExpr) + - INDENT + (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) + UNDENT) - else: - smExpr = Group( Optional(NL) + - (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) ) - blockStatementExpr.ignore(_bslash + LineEnd()) - return smExpr.setName('indented block') - -alphas8bit = srange(r"[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]") -punc8bit = srange(r"[\0xa1-\0xbf\0xd7\0xf7]") - -anyOpenTag,anyCloseTag = makeHTMLTags(Word(alphas,alphanums+"_:").setName('any tag')) -_htmlEntityMap = dict(zip("gt lt amp nbsp quot apos".split(),'><& "\'')) -commonHTMLEntity = Regex('&(?P' + '|'.join(_htmlEntityMap.keys()) +");").setName("common HTML entity") -def replaceHTMLEntity(t): - """Helper parser action to replace common HTML entities with their special characters""" - return _htmlEntityMap.get(t.entity) - -# it's easy to get these comment structures wrong - they're very common, so may as well make them available -cStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/').setName("C style comment") -"Comment of the form C{/* ... */}" - -htmlComment = Regex(r"").setName("HTML comment") -"Comment of the form C{}" - -restOfLine = Regex(r".*").leaveWhitespace().setName("rest of line") -dblSlashComment = Regex(r"//(?:\\\n|[^\n])*").setName("// comment") -"Comment of the form C{// ... (to end of line)}" - -cppStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/'| dblSlashComment).setName("C++ style comment") -"Comment of either form C{L{cStyleComment}} or C{L{dblSlashComment}}" - -javaStyleComment = cppStyleComment -"Same as C{L{cppStyleComment}}" - -pythonStyleComment = Regex(r"#.*").setName("Python style comment") -"Comment of the form C{# ... (to end of line)}" - -_commasepitem = Combine(OneOrMore(Word(printables, excludeChars=',') + - Optional( Word(" \t") + - ~Literal(",") + ~LineEnd() ) ) ).streamline().setName("commaItem") -commaSeparatedList = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("commaSeparatedList") -"""(Deprecated) Predefined expression of 1 or more printable words or quoted strings, separated by commas. - This expression is deprecated in favor of L{pyparsing_common.comma_separated_list}.""" - -# some other useful expressions - using lower-case class name since we are really using this as a namespace -class pyparsing_common: - """ - Here are some common low-level expressions that may be useful in jump-starting parser development: - - numeric forms (L{integers}, L{reals}, L{scientific notation}) - - common L{programming identifiers} - - network addresses (L{MAC}, L{IPv4}, L{IPv6}) - - ISO8601 L{dates} and L{datetime} - - L{UUID} - - L{comma-separated list} - Parse actions: - - C{L{convertToInteger}} - - C{L{convertToFloat}} - - C{L{convertToDate}} - - C{L{convertToDatetime}} - - C{L{stripHTMLTags}} - - C{L{upcaseTokens}} - - C{L{downcaseTokens}} - - Example:: - pyparsing_common.number.runTests(''' - # any int or real number, returned as the appropriate type - 100 - -100 - +100 - 3.14159 - 6.02e23 - 1e-12 - ''') - - pyparsing_common.fnumber.runTests(''' - # any int or real number, returned as float - 100 - -100 - +100 - 3.14159 - 6.02e23 - 1e-12 - ''') - - pyparsing_common.hex_integer.runTests(''' - # hex numbers - 100 - FF - ''') - - pyparsing_common.fraction.runTests(''' - # fractions - 1/2 - -3/4 - ''') - - pyparsing_common.mixed_integer.runTests(''' - # mixed fractions - 1 - 1/2 - -3/4 - 1-3/4 - ''') - - import uuid - pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID)) - pyparsing_common.uuid.runTests(''' - # uuid - 12345678-1234-5678-1234-567812345678 - ''') - prints:: - # any int or real number, returned as the appropriate type - 100 - [100] - - -100 - [-100] - - +100 - [100] - - 3.14159 - [3.14159] - - 6.02e23 - [6.02e+23] - - 1e-12 - [1e-12] - - # any int or real number, returned as float - 100 - [100.0] - - -100 - [-100.0] - - +100 - [100.0] - - 3.14159 - [3.14159] - - 6.02e23 - [6.02e+23] - - 1e-12 - [1e-12] - - # hex numbers - 100 - [256] - - FF - [255] - - # fractions - 1/2 - [0.5] - - -3/4 - [-0.75] - - # mixed fractions - 1 - [1] - - 1/2 - [0.5] - - -3/4 - [-0.75] - - 1-3/4 - [1.75] - - # uuid - 12345678-1234-5678-1234-567812345678 - [UUID('12345678-1234-5678-1234-567812345678')] - """ - - convertToInteger = tokenMap(int) - """ - Parse action for converting parsed integers to Python int - """ - - convertToFloat = tokenMap(float) - """ - Parse action for converting parsed numbers to Python float - """ - - integer = Word(nums).setName("integer").setParseAction(convertToInteger) - """expression that parses an unsigned integer, returns an int""" - - hex_integer = Word(hexnums).setName("hex integer").setParseAction(tokenMap(int,16)) - """expression that parses a hexadecimal integer, returns an int""" - - signed_integer = Regex(r'[+-]?\d+').setName("signed integer").setParseAction(convertToInteger) - """expression that parses an integer with optional leading sign, returns an int""" - - fraction = (signed_integer().setParseAction(convertToFloat) + '/' + signed_integer().setParseAction(convertToFloat)).setName("fraction") - """fractional expression of an integer divided by an integer, returns a float""" - fraction.addParseAction(lambda t: t[0]/t[-1]) - - mixed_integer = (fraction | signed_integer + Optional(Optional('-').suppress() + fraction)).setName("fraction or mixed integer-fraction") - """mixed integer of the form 'integer - fraction', with optional leading integer, returns float""" - mixed_integer.addParseAction(sum) - - real = Regex(r'[+-]?\d+\.\d*').setName("real number").setParseAction(convertToFloat) - """expression that parses a floating point number and returns a float""" - - sci_real = Regex(r'[+-]?\d+([eE][+-]?\d+|\.\d*([eE][+-]?\d+)?)').setName("real number with scientific notation").setParseAction(convertToFloat) - """expression that parses a floating point number with optional scientific notation and returns a float""" - - # streamlining this expression makes the docs nicer-looking - number = (sci_real | real | signed_integer).streamline() - """any numeric expression, returns the corresponding Python type""" - - fnumber = Regex(r'[+-]?\d+\.?\d*([eE][+-]?\d+)?').setName("fnumber").setParseAction(convertToFloat) - """any int or real number, returned as float""" - - identifier = Word(alphas+'_', alphanums+'_').setName("identifier") - """typical code identifier (leading alpha or '_', followed by 0 or more alphas, nums, or '_')""" - - ipv4_address = Regex(r'(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}').setName("IPv4 address") - "IPv4 address (C{0.0.0.0 - 255.255.255.255})" - - _ipv6_part = Regex(r'[0-9a-fA-F]{1,4}').setName("hex_integer") - _full_ipv6_address = (_ipv6_part + (':' + _ipv6_part)*7).setName("full IPv6 address") - _short_ipv6_address = (Optional(_ipv6_part + (':' + _ipv6_part)*(0,6)) + "::" + Optional(_ipv6_part + (':' + _ipv6_part)*(0,6))).setName("short IPv6 address") - _short_ipv6_address.addCondition(lambda t: sum(1 for tt in t if pyparsing_common._ipv6_part.matches(tt)) < 8) - _mixed_ipv6_address = ("::ffff:" + ipv4_address).setName("mixed IPv6 address") - ipv6_address = Combine((_full_ipv6_address | _mixed_ipv6_address | _short_ipv6_address).setName("IPv6 address")).setName("IPv6 address") - "IPv6 address (long, short, or mixed form)" - - mac_address = Regex(r'[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}').setName("MAC address") - "MAC address xx:xx:xx:xx:xx (may also have '-' or '.' delimiters)" - - @staticmethod - def convertToDate(fmt="%Y-%m-%d"): - """ - Helper to create a parse action for converting parsed date string to Python datetime.date - - Params - - - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%d"}) - - Example:: - date_expr = pyparsing_common.iso8601_date.copy() - date_expr.setParseAction(pyparsing_common.convertToDate()) - print(date_expr.parseString("1999-12-31")) - prints:: - [datetime.date(1999, 12, 31)] - """ - def cvt_fn(s,l,t): - try: - return datetime.strptime(t[0], fmt).date() - except ValueError as ve: - raise ParseException(s, l, str(ve)) - return cvt_fn - - @staticmethod - def convertToDatetime(fmt="%Y-%m-%dT%H:%M:%S.%f"): - """ - Helper to create a parse action for converting parsed datetime string to Python datetime.datetime - - Params - - - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%dT%H:%M:%S.%f"}) - - Example:: - dt_expr = pyparsing_common.iso8601_datetime.copy() - dt_expr.setParseAction(pyparsing_common.convertToDatetime()) - print(dt_expr.parseString("1999-12-31T23:59:59.999")) - prints:: - [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)] - """ - def cvt_fn(s,l,t): - try: - return datetime.strptime(t[0], fmt) - except ValueError as ve: - raise ParseException(s, l, str(ve)) - return cvt_fn - - iso8601_date = Regex(r'(?P\d{4})(?:-(?P\d\d)(?:-(?P\d\d))?)?').setName("ISO8601 date") - "ISO8601 date (C{yyyy-mm-dd})" - - iso8601_datetime = Regex(r'(?P\d{4})-(?P\d\d)-(?P\d\d)[T ](?P\d\d):(?P\d\d)(:(?P\d\d(\.\d*)?)?)?(?PZ|[+-]\d\d:?\d\d)?').setName("ISO8601 datetime") - "ISO8601 datetime (C{yyyy-mm-ddThh:mm:ss.s(Z|+-00:00)}) - trailing seconds, milliseconds, and timezone optional; accepts separating C{'T'} or C{' '}" - - uuid = Regex(r'[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}').setName("UUID") - "UUID (C{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx})" - - _html_stripper = anyOpenTag.suppress() | anyCloseTag.suppress() - @staticmethod - def stripHTMLTags(s, l, tokens): - """ - Parse action to remove HTML tags from web page HTML source - - Example:: - # strip HTML links from normal text - text = 'More info at the pyparsing wiki page' - td,td_end = makeHTMLTags("TD") - table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end - - print(table_text.parseString(text).body) # -> 'More info at the pyparsing wiki page' - """ - return pyparsing_common._html_stripper.transformString(tokens[0]) - - _commasepitem = Combine(OneOrMore(~Literal(",") + ~LineEnd() + Word(printables, excludeChars=',') - + Optional( White(" \t") ) ) ).streamline().setName("commaItem") - comma_separated_list = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("comma separated list") - """Predefined expression of 1 or more printable words or quoted strings, separated by commas.""" - - upcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).upper())) - """Parse action to convert tokens to upper case.""" - - downcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).lower())) - """Parse action to convert tokens to lower case.""" - - -if __name__ == "__main__": - - selectToken = CaselessLiteral("select") - fromToken = CaselessLiteral("from") - - ident = Word(alphas, alphanums + "_$") - - columnName = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens) - columnNameList = Group(delimitedList(columnName)).setName("columns") - columnSpec = ('*' | columnNameList) - - tableName = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens) - tableNameList = Group(delimitedList(tableName)).setName("tables") - - simpleSQL = selectToken("command") + columnSpec("columns") + fromToken + tableNameList("tables") - - # demo runTests method, including embedded comments in test string - simpleSQL.runTests(""" - # '*' as column list and dotted table name - select * from SYS.XYZZY - - # caseless match on "SELECT", and casts back to "select" - SELECT * from XYZZY, ABC - - # list of column names, and mixed case SELECT keyword - Select AA,BB,CC from Sys.dual - - # multiple tables - Select A, B, C from Sys.dual, Table2 - - # invalid SELECT keyword - should fail - Xelect A, B, C from Sys.dual - - # incomplete command - should fail - Select - - # invalid column name - should fail - Select ^^^ frox Sys.dual - - """) - - pyparsing_common.number.runTests(""" - 100 - -100 - +100 - 3.14159 - 6.02e23 - 1e-12 - """) - - # any int or real number, returned as float - pyparsing_common.fnumber.runTests(""" - 100 - -100 - +100 - 3.14159 - 6.02e23 - 1e-12 - """) - - pyparsing_common.hex_integer.runTests(""" - 100 - FF - """) - - import uuid - pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID)) - pyparsing_common.uuid.runTests(""" - 12345678-1234-5678-1234-567812345678 - """) diff --git a/setuptools/_vendor/pyparsing/__init__.py b/setuptools/_vendor/pyparsing/__init__.py new file mode 100644 index 0000000..45f334d --- /dev/null +++ b/setuptools/_vendor/pyparsing/__init__.py @@ -0,0 +1,331 @@ +# module pyparsing.py +# +# Copyright (c) 2003-2022 Paul T. McGuire +# +# Permission is hereby granted, free of charge, to any person obtaining +# a copy of this software and associated documentation files (the +# "Software"), to deal in the Software without restriction, including +# without limitation the rights to use, copy, modify, merge, publish, +# distribute, sublicense, and/or sell copies of the Software, and to +# permit persons to whom the Software is furnished to do so, subject to +# the following conditions: +# +# The above copyright notice and this permission notice shall be +# included in all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +# + +__doc__ = """ +pyparsing module - Classes and methods to define and execute parsing grammars +============================================================================= + +The pyparsing module is an alternative approach to creating and +executing simple grammars, vs. the traditional lex/yacc approach, or the +use of regular expressions. With pyparsing, you don't need to learn +a new syntax for defining grammars or matching expressions - the parsing +module provides a library of classes that you use to construct the +grammar directly in Python. + +Here is a program to parse "Hello, World!" (or any greeting of the form +``", !"``), built up using :class:`Word`, +:class:`Literal`, and :class:`And` elements +(the :meth:`'+'` operators create :class:`And` expressions, +and the strings are auto-converted to :class:`Literal` expressions):: + + from pyparsing import Word, alphas + + # define grammar of a greeting + greet = Word(alphas) + "," + Word(alphas) + "!" + + hello = "Hello, World!" + print(hello, "->", greet.parse_string(hello)) + +The program outputs the following:: + + Hello, World! -> ['Hello', ',', 'World', '!'] + +The Python representation of the grammar is quite readable, owing to the +self-explanatory class names, and the use of :class:`'+'`, +:class:`'|'`, :class:`'^'` and :class:`'&'` operators. + +The :class:`ParseResults` object returned from +:class:`ParserElement.parseString` can be +accessed as a nested list, a dictionary, or an object with named +attributes. + +The pyparsing module handles some of the problems that are typically +vexing when writing text parsers: + + - extra or missing whitespace (the above program will also handle + "Hello,World!", "Hello , World !", etc.) + - quoted strings + - embedded comments + + +Getting Started - +----------------- +Visit the classes :class:`ParserElement` and :class:`ParseResults` to +see the base classes that most other pyparsing +classes inherit from. Use the docstrings for examples of how to: + + - construct literal match expressions from :class:`Literal` and + :class:`CaselessLiteral` classes + - construct character word-group expressions using the :class:`Word` + class + - see how to create repetitive expressions using :class:`ZeroOrMore` + and :class:`OneOrMore` classes + - use :class:`'+'`, :class:`'|'`, :class:`'^'`, + and :class:`'&'` operators to combine simple expressions into + more complex ones + - associate names with your parsed results using + :class:`ParserElement.setResultsName` + - access the parsed data, which is returned as a :class:`ParseResults` + object + - find some helpful expression short-cuts like :class:`delimitedList` + and :class:`oneOf` + - find more useful common expressions in the :class:`pyparsing_common` + namespace class +""" +from typing import NamedTuple + + +class version_info(NamedTuple): + major: int + minor: int + micro: int + releaselevel: str + serial: int + + @property + def __version__(self): + return ( + "{}.{}.{}".format(self.major, self.minor, self.micro) + + ( + "{}{}{}".format( + "r" if self.releaselevel[0] == "c" else "", + self.releaselevel[0], + self.serial, + ), + "", + )[self.releaselevel == "final"] + ) + + def __str__(self): + return "{} {} / {}".format(__name__, self.__version__, __version_time__) + + def __repr__(self): + return "{}.{}({})".format( + __name__, + type(self).__name__, + ", ".join("{}={!r}".format(*nv) for nv in zip(self._fields, self)), + ) + + +__version_info__ = version_info(3, 0, 8, "final", 0) +__version_time__ = "09 Apr 2022 23:29 UTC" +__version__ = __version_info__.__version__ +__versionTime__ = __version_time__ +__author__ = "Paul McGuire " + +from .util import * +from .exceptions import * +from .actions import * +from .core import __diag__, __compat__ +from .results import * +from .core import * +from .core import _builtin_exprs as core_builtin_exprs +from .helpers import * +from .helpers import _builtin_exprs as helper_builtin_exprs + +from .unicode import unicode_set, UnicodeRangeList, pyparsing_unicode as unicode +from .testing import pyparsing_test as testing +from .common import ( + pyparsing_common as common, + _builtin_exprs as common_builtin_exprs, +) + +# define backward compat synonyms +if "pyparsing_unicode" not in globals(): + pyparsing_unicode = unicode +if "pyparsing_common" not in globals(): + pyparsing_common = common +if "pyparsing_test" not in globals(): + pyparsing_test = testing + +core_builtin_exprs += common_builtin_exprs + helper_builtin_exprs + + +__all__ = [ + "__version__", + "__version_time__", + "__author__", + "__compat__", + "__diag__", + "And", + "AtLineStart", + "AtStringStart", + "CaselessKeyword", + "CaselessLiteral", + "CharsNotIn", + "Combine", + "Dict", + "Each", + "Empty", + "FollowedBy", + "Forward", + "GoToColumn", + "Group", + "IndentedBlock", + "Keyword", + "LineEnd", + "LineStart", + "Literal", + "Located", + "PrecededBy", + "MatchFirst", + "NoMatch", + "NotAny", + "OneOrMore", + "OnlyOnce", + "OpAssoc", + "Opt", + "Optional", + "Or", + "ParseBaseException", + "ParseElementEnhance", + "ParseException", + "ParseExpression", + "ParseFatalException", + "ParseResults", + "ParseSyntaxException", + "ParserElement", + "PositionToken", + "QuotedString", + "RecursiveGrammarException", + "Regex", + "SkipTo", + "StringEnd", + "StringStart", + "Suppress", + "Token", + "TokenConverter", + "White", + "Word", + "WordEnd", + "WordStart", + "ZeroOrMore", + "Char", + "alphanums", + "alphas", + "alphas8bit", + "any_close_tag", + "any_open_tag", + "c_style_comment", + "col", + "common_html_entity", + "counted_array", + "cpp_style_comment", + "dbl_quoted_string", + "dbl_slash_comment", + "delimited_list", + "dict_of", + "empty", + "hexnums", + "html_comment", + "identchars", + "identbodychars", + "java_style_comment", + "line", + "line_end", + "line_start", + "lineno", + "make_html_tags", + "make_xml_tags", + "match_only_at_col", + "match_previous_expr", + "match_previous_literal", + "nested_expr", + "null_debug_action", + "nums", + "one_of", + "printables", + "punc8bit", + "python_style_comment", + "quoted_string", + "remove_quotes", + "replace_with", + "replace_html_entity", + "rest_of_line", + "sgl_quoted_string", + "srange", + "string_end", + "string_start", + "trace_parse_action", + "unicode_string", + "with_attribute", + "indentedBlock", + "original_text_for", + "ungroup", + "infix_notation", + "locatedExpr", + "with_class", + "CloseMatch", + "token_map", + "pyparsing_common", + "pyparsing_unicode", + "unicode_set", + "condition_as_parse_action", + "pyparsing_test", + # pre-PEP8 compatibility names + "__versionTime__", + "anyCloseTag", + "anyOpenTag", + "cStyleComment", + "commonHTMLEntity", + "countedArray", + "cppStyleComment", + "dblQuotedString", + "dblSlashComment", + "delimitedList", + "dictOf", + "htmlComment", + "javaStyleComment", + "lineEnd", + "lineStart", + "makeHTMLTags", + "makeXMLTags", + "matchOnlyAtCol", + "matchPreviousExpr", + "matchPreviousLiteral", + "nestedExpr", + "nullDebugAction", + "oneOf", + "opAssoc", + "pythonStyleComment", + "quotedString", + "removeQuotes", + "replaceHTMLEntity", + "replaceWith", + "restOfLine", + "sglQuotedString", + "stringEnd", + "stringStart", + "traceParseAction", + "unicodeString", + "withAttribute", + "indentedBlock", + "originalTextFor", + "infixNotation", + "locatedExpr", + "withClass", + "tokenMap", + "conditionAsParseAction", + "autoname_elements", +] diff --git a/setuptools/_vendor/pyparsing/actions.py b/setuptools/_vendor/pyparsing/actions.py new file mode 100644 index 0000000..2bcc550 --- /dev/null +++ b/setuptools/_vendor/pyparsing/actions.py @@ -0,0 +1,207 @@ +# actions.py + +from .exceptions import ParseException +from .util import col + + +class OnlyOnce: + """ + Wrapper for parse actions, to ensure they are only called once. + """ + + def __init__(self, method_call): + from .core import _trim_arity + + self.callable = _trim_arity(method_call) + self.called = False + + def __call__(self, s, l, t): + if not self.called: + results = self.callable(s, l, t) + self.called = True + return results + raise ParseException(s, l, "OnlyOnce obj called multiple times w/out reset") + + def reset(self): + """ + Allow the associated parse action to be called once more. + """ + + self.called = False + + +def match_only_at_col(n): + """ + Helper method for defining parse actions that require matching at + a specific column in the input text. + """ + + def verify_col(strg, locn, toks): + if col(locn, strg) != n: + raise ParseException(strg, locn, "matched token not at column {}".format(n)) + + return verify_col + + +def replace_with(repl_str): + """ + Helper method for common parse actions that simply return + a literal value. Especially useful when used with + :class:`transform_string` (). + + Example:: + + num = Word(nums).set_parse_action(lambda toks: int(toks[0])) + na = one_of("N/A NA").set_parse_action(replace_with(math.nan)) + term = na | num + + OneOrMore(term).parse_string("324 234 N/A 234") # -> [324, 234, nan, 234] + """ + return lambda s, l, t: [repl_str] + + +def remove_quotes(s, l, t): + """ + Helper parse action for removing quotation marks from parsed + quoted strings. + + Example:: + + # by default, quotation marks are included in parsed results + quoted_string.parse_string("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"] + + # use remove_quotes to strip quotation marks from parsed results + quoted_string.set_parse_action(remove_quotes) + quoted_string.parse_string("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"] + """ + return t[0][1:-1] + + +def with_attribute(*args, **attr_dict): + """ + Helper to create a validating parse action to be used with start + tags created with :class:`make_xml_tags` or + :class:`make_html_tags`. Use ``with_attribute`` to qualify + a starting tag with a required attribute value, to avoid false + matches on common tags such as ```` or ``
``. + + Call ``with_attribute`` with a series of attribute names and + values. Specify the list of filter attributes names and values as: + + - keyword arguments, as in ``(align="right")``, or + - as an explicit dict with ``**`` operator, when an attribute + name is also a Python reserved word, as in ``**{"class":"Customer", "align":"right"}`` + - a list of name-value tuples, as in ``(("ns1:class", "Customer"), ("ns2:align", "right"))`` + + For attribute names with a namespace prefix, you must use the second + form. Attribute names are matched insensitive to upper/lower case. + + If just testing for ``class`` (with or without a namespace), use + :class:`with_class`. + + To verify that the attribute exists, but without specifying a value, + pass ``with_attribute.ANY_VALUE`` as the value. + + Example:: + + html = ''' +
+ Some text +
1 4 0 1 0
+
1,3 2,3 1,1
+
this has no type
+
+ + ''' + div,div_end = make_html_tags("div") + + # only match div tag having a type attribute with value "grid" + div_grid = div().set_parse_action(with_attribute(type="grid")) + grid_expr = div_grid + SkipTo(div | div_end)("body") + for grid_header in grid_expr.search_string(html): + print(grid_header.body) + + # construct a match with any div tag having a type attribute, regardless of the value + div_any_type = div().set_parse_action(with_attribute(type=with_attribute.ANY_VALUE)) + div_expr = div_any_type + SkipTo(div | div_end)("body") + for div_header in div_expr.search_string(html): + print(div_header.body) + + prints:: + + 1 4 0 1 0 + + 1 4 0 1 0 + 1,3 2,3 1,1 + """ + if args: + attrs = args[:] + else: + attrs = attr_dict.items() + attrs = [(k, v) for k, v in attrs] + + def pa(s, l, tokens): + for attrName, attrValue in attrs: + if attrName not in tokens: + raise ParseException(s, l, "no matching attribute " + attrName) + if attrValue != with_attribute.ANY_VALUE and tokens[attrName] != attrValue: + raise ParseException( + s, + l, + "attribute {!r} has value {!r}, must be {!r}".format( + attrName, tokens[attrName], attrValue + ), + ) + + return pa + + +with_attribute.ANY_VALUE = object() + + +def with_class(classname, namespace=""): + """ + Simplified version of :class:`with_attribute` when + matching on a div class - made difficult because ``class`` is + a reserved word in Python. + + Example:: + + html = ''' +
+ Some text +
1 4 0 1 0
+
1,3 2,3 1,1
+
this <div> has no class
+
+ + ''' + div,div_end = make_html_tags("div") + div_grid = div().set_parse_action(with_class("grid")) + + grid_expr = div_grid + SkipTo(div | div_end)("body") + for grid_header in grid_expr.search_string(html): + print(grid_header.body) + + div_any_type = div().set_parse_action(with_class(withAttribute.ANY_VALUE)) + div_expr = div_any_type + SkipTo(div | div_end)("body") + for div_header in div_expr.search_string(html): + print(div_header.body) + + prints:: + + 1 4 0 1 0 + + 1 4 0 1 0 + 1,3 2,3 1,1 + """ + classattr = "{}:class".format(namespace) if namespace else "class" + return with_attribute(**{classattr: classname}) + + +# pre-PEP8 compatibility symbols +replaceWith = replace_with +removeQuotes = remove_quotes +withAttribute = with_attribute +withClass = with_class +matchOnlyAtCol = match_only_at_col diff --git a/setuptools/_vendor/pyparsing/common.py b/setuptools/_vendor/pyparsing/common.py new file mode 100644 index 0000000..1859fb7 --- /dev/null +++ b/setuptools/_vendor/pyparsing/common.py @@ -0,0 +1,424 @@ +# common.py +from .core import * +from .helpers import delimited_list, any_open_tag, any_close_tag +from datetime import datetime + + +# some other useful expressions - using lower-case class name since we are really using this as a namespace +class pyparsing_common: + """Here are some common low-level expressions that may be useful in + jump-starting parser development: + + - numeric forms (:class:`integers`, :class:`reals`, + :class:`scientific notation`) + - common :class:`programming identifiers` + - network addresses (:class:`MAC`, + :class:`IPv4`, :class:`IPv6`) + - ISO8601 :class:`dates` and + :class:`datetime` + - :class:`UUID` + - :class:`comma-separated list` + - :class:`url` + + Parse actions: + + - :class:`convertToInteger` + - :class:`convertToFloat` + - :class:`convertToDate` + - :class:`convertToDatetime` + - :class:`stripHTMLTags` + - :class:`upcaseTokens` + - :class:`downcaseTokens` + + Example:: + + pyparsing_common.number.runTests(''' + # any int or real number, returned as the appropriate type + 100 + -100 + +100 + 3.14159 + 6.02e23 + 1e-12 + ''') + + pyparsing_common.fnumber.runTests(''' + # any int or real number, returned as float + 100 + -100 + +100 + 3.14159 + 6.02e23 + 1e-12 + ''') + + pyparsing_common.hex_integer.runTests(''' + # hex numbers + 100 + FF + ''') + + pyparsing_common.fraction.runTests(''' + # fractions + 1/2 + -3/4 + ''') + + pyparsing_common.mixed_integer.runTests(''' + # mixed fractions + 1 + 1/2 + -3/4 + 1-3/4 + ''') + + import uuid + pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID)) + pyparsing_common.uuid.runTests(''' + # uuid + 12345678-1234-5678-1234-567812345678 + ''') + + prints:: + + # any int or real number, returned as the appropriate type + 100 + [100] + + -100 + [-100] + + +100 + [100] + + 3.14159 + [3.14159] + + 6.02e23 + [6.02e+23] + + 1e-12 + [1e-12] + + # any int or real number, returned as float + 100 + [100.0] + + -100 + [-100.0] + + +100 + [100.0] + + 3.14159 + [3.14159] + + 6.02e23 + [6.02e+23] + + 1e-12 + [1e-12] + + # hex numbers + 100 + [256] + + FF + [255] + + # fractions + 1/2 + [0.5] + + -3/4 + [-0.75] + + # mixed fractions + 1 + [1] + + 1/2 + [0.5] + + -3/4 + [-0.75] + + 1-3/4 + [1.75] + + # uuid + 12345678-1234-5678-1234-567812345678 + [UUID('12345678-1234-5678-1234-567812345678')] + """ + + convert_to_integer = token_map(int) + """ + Parse action for converting parsed integers to Python int + """ + + convert_to_float = token_map(float) + """ + Parse action for converting parsed numbers to Python float + """ + + integer = Word(nums).set_name("integer").set_parse_action(convert_to_integer) + """expression that parses an unsigned integer, returns an int""" + + hex_integer = ( + Word(hexnums).set_name("hex integer").set_parse_action(token_map(int, 16)) + ) + """expression that parses a hexadecimal integer, returns an int""" + + signed_integer = ( + Regex(r"[+-]?\d+") + .set_name("signed integer") + .set_parse_action(convert_to_integer) + ) + """expression that parses an integer with optional leading sign, returns an int""" + + fraction = ( + signed_integer().set_parse_action(convert_to_float) + + "/" + + signed_integer().set_parse_action(convert_to_float) + ).set_name("fraction") + """fractional expression of an integer divided by an integer, returns a float""" + fraction.add_parse_action(lambda tt: tt[0] / tt[-1]) + + mixed_integer = ( + fraction | signed_integer + Opt(Opt("-").suppress() + fraction) + ).set_name("fraction or mixed integer-fraction") + """mixed integer of the form 'integer - fraction', with optional leading integer, returns float""" + mixed_integer.add_parse_action(sum) + + real = ( + Regex(r"[+-]?(?:\d+\.\d*|\.\d+)") + .set_name("real number") + .set_parse_action(convert_to_float) + ) + """expression that parses a floating point number and returns a float""" + + sci_real = ( + Regex(r"[+-]?(?:\d+(?:[eE][+-]?\d+)|(?:\d+\.\d*|\.\d+)(?:[eE][+-]?\d+)?)") + .set_name("real number with scientific notation") + .set_parse_action(convert_to_float) + ) + """expression that parses a floating point number with optional + scientific notation and returns a float""" + + # streamlining this expression makes the docs nicer-looking + number = (sci_real | real | signed_integer).setName("number").streamline() + """any numeric expression, returns the corresponding Python type""" + + fnumber = ( + Regex(r"[+-]?\d+\.?\d*([eE][+-]?\d+)?") + .set_name("fnumber") + .set_parse_action(convert_to_float) + ) + """any int or real number, returned as float""" + + identifier = Word(identchars, identbodychars).set_name("identifier") + """typical code identifier (leading alpha or '_', followed by 0 or more alphas, nums, or '_')""" + + ipv4_address = Regex( + r"(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}" + ).set_name("IPv4 address") + "IPv4 address (``0.0.0.0 - 255.255.255.255``)" + + _ipv6_part = Regex(r"[0-9a-fA-F]{1,4}").set_name("hex_integer") + _full_ipv6_address = (_ipv6_part + (":" + _ipv6_part) * 7).set_name( + "full IPv6 address" + ) + _short_ipv6_address = ( + Opt(_ipv6_part + (":" + _ipv6_part) * (0, 6)) + + "::" + + Opt(_ipv6_part + (":" + _ipv6_part) * (0, 6)) + ).set_name("short IPv6 address") + _short_ipv6_address.add_condition( + lambda t: sum(1 for tt in t if pyparsing_common._ipv6_part.matches(tt)) < 8 + ) + _mixed_ipv6_address = ("::ffff:" + ipv4_address).set_name("mixed IPv6 address") + ipv6_address = Combine( + (_full_ipv6_address | _mixed_ipv6_address | _short_ipv6_address).set_name( + "IPv6 address" + ) + ).set_name("IPv6 address") + "IPv6 address (long, short, or mixed form)" + + mac_address = Regex( + r"[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}" + ).set_name("MAC address") + "MAC address xx:xx:xx:xx:xx (may also have '-' or '.' delimiters)" + + @staticmethod + def convert_to_date(fmt: str = "%Y-%m-%d"): + """ + Helper to create a parse action for converting parsed date string to Python datetime.date + + Params - + - fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%d"``) + + Example:: + + date_expr = pyparsing_common.iso8601_date.copy() + date_expr.setParseAction(pyparsing_common.convertToDate()) + print(date_expr.parseString("1999-12-31")) + + prints:: + + [datetime.date(1999, 12, 31)] + """ + + def cvt_fn(ss, ll, tt): + try: + return datetime.strptime(tt[0], fmt).date() + except ValueError as ve: + raise ParseException(ss, ll, str(ve)) + + return cvt_fn + + @staticmethod + def convert_to_datetime(fmt: str = "%Y-%m-%dT%H:%M:%S.%f"): + """Helper to create a parse action for converting parsed + datetime string to Python datetime.datetime + + Params - + - fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%dT%H:%M:%S.%f"``) + + Example:: + + dt_expr = pyparsing_common.iso8601_datetime.copy() + dt_expr.setParseAction(pyparsing_common.convertToDatetime()) + print(dt_expr.parseString("1999-12-31T23:59:59.999")) + + prints:: + + [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)] + """ + + def cvt_fn(s, l, t): + try: + return datetime.strptime(t[0], fmt) + except ValueError as ve: + raise ParseException(s, l, str(ve)) + + return cvt_fn + + iso8601_date = Regex( + r"(?P\d{4})(?:-(?P\d\d)(?:-(?P\d\d))?)?" + ).set_name("ISO8601 date") + "ISO8601 date (``yyyy-mm-dd``)" + + iso8601_datetime = Regex( + r"(?P\d{4})-(?P\d\d)-(?P\d\d)[T ](?P\d\d):(?P\d\d)(:(?P\d\d(\.\d*)?)?)?(?PZ|[+-]\d\d:?\d\d)?" + ).set_name("ISO8601 datetime") + "ISO8601 datetime (``yyyy-mm-ddThh:mm:ss.s(Z|+-00:00)``) - trailing seconds, milliseconds, and timezone optional; accepts separating ``'T'`` or ``' '``" + + uuid = Regex(r"[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}").set_name("UUID") + "UUID (``xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx``)" + + _html_stripper = any_open_tag.suppress() | any_close_tag.suppress() + + @staticmethod + def strip_html_tags(s: str, l: int, tokens: ParseResults): + """Parse action to remove HTML tags from web page HTML source + + Example:: + + # strip HTML links from normal text + text = 'More info at the pyparsing wiki page' + td, td_end = makeHTMLTags("TD") + table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end + print(table_text.parseString(text).body) + + Prints:: + + More info at the pyparsing wiki page + """ + return pyparsing_common._html_stripper.transform_string(tokens[0]) + + _commasepitem = ( + Combine( + OneOrMore( + ~Literal(",") + + ~LineEnd() + + Word(printables, exclude_chars=",") + + Opt(White(" \t") + ~FollowedBy(LineEnd() | ",")) + ) + ) + .streamline() + .set_name("commaItem") + ) + comma_separated_list = delimited_list( + Opt(quoted_string.copy() | _commasepitem, default="") + ).set_name("comma separated list") + """Predefined expression of 1 or more printable words or quoted strings, separated by commas.""" + + upcase_tokens = staticmethod(token_map(lambda t: t.upper())) + """Parse action to convert tokens to upper case.""" + + downcase_tokens = staticmethod(token_map(lambda t: t.lower())) + """Parse action to convert tokens to lower case.""" + + # fmt: off + url = Regex( + # https://mathiasbynens.be/demo/url-regex + # https://gist.github.com/dperini/729294 + r"^" + + # protocol identifier (optional) + # short syntax // still required + r"(?:(?:(?Phttps?|ftp):)?\/\/)" + + # user:pass BasicAuth (optional) + r"(?:(?P\S+(?::\S*)?)@)?" + + r"(?P" + + # IP address exclusion + # private & local networks + r"(?!(?:10|127)(?:\.\d{1,3}){3})" + + r"(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})" + + r"(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})" + + # IP address dotted notation octets + # excludes loopback network 0.0.0.0 + # excludes reserved space >= 224.0.0.0 + # excludes network & broadcast addresses + # (first & last IP address of each class) + r"(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])" + + r"(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}" + + r"(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))" + + r"|" + + # host & domain names, may end with dot + # can be replaced by a shortest alternative + # (?![-_])(?:[-\w\u00a1-\uffff]{0,63}[^-_]\.)+ + r"(?:" + + r"(?:" + + r"[a-z0-9\u00a1-\uffff]" + + r"[a-z0-9\u00a1-\uffff_-]{0,62}" + + r")?" + + r"[a-z0-9\u00a1-\uffff]\." + + r")+" + + # TLD identifier name, may end with dot + r"(?:[a-z\u00a1-\uffff]{2,}\.?)" + + r")" + + # port number (optional) + r"(:(?P\d{2,5}))?" + + # resource path (optional) + r"(?P\/[^?# ]*)?" + + # query string (optional) + r"(\?(?P[^#]*))?" + + # fragment (optional) + r"(#(?P\S*))?" + + r"$" + ).set_name("url") + # fmt: on + + # pre-PEP8 compatibility names + convertToInteger = convert_to_integer + convertToFloat = convert_to_float + convertToDate = convert_to_date + convertToDatetime = convert_to_datetime + stripHTMLTags = strip_html_tags + upcaseTokens = upcase_tokens + downcaseTokens = downcase_tokens + + +_builtin_exprs = [ + v for v in vars(pyparsing_common).values() if isinstance(v, ParserElement) +] diff --git a/setuptools/_vendor/pyparsing/core.py b/setuptools/_vendor/pyparsing/core.py new file mode 100644 index 0000000..454bd57 --- /dev/null +++ b/setuptools/_vendor/pyparsing/core.py @@ -0,0 +1,5812 @@ +# +# core.py +# +import os +from typing import ( + Optional as OptionalType, + Iterable as IterableType, + NamedTuple, + Union, + Callable, + Any, + Generator, + Tuple, + List, + TextIO, + Set, + Dict as DictType, + Sequence, +) +from abc import ABC, abstractmethod +from enum import Enum +import string +import copy +import warnings +import re +import sys +from collections.abc import Iterable +import traceback +import types +from operator import itemgetter +from functools import wraps +from threading import RLock +from pathlib import Path + +from .util import ( + _FifoCache, + _UnboundedCache, + __config_flags, + _collapse_string_to_ranges, + _escape_regex_range_chars, + _bslash, + _flatten, + LRUMemo as _LRUMemo, + UnboundedMemo as _UnboundedMemo, +) +from .exceptions import * +from .actions import * +from .results import ParseResults, _ParseResultsWithOffset +from .unicode import pyparsing_unicode + +_MAX_INT = sys.maxsize +str_type: Tuple[type, ...] = (str, bytes) + +# +# Copyright (c) 2003-2022 Paul T. McGuire +# +# Permission is hereby granted, free of charge, to any person obtaining +# a copy of this software and associated documentation files (the +# "Software"), to deal in the Software without restriction, including +# without limitation the rights to use, copy, modify, merge, publish, +# distribute, sublicense, and/or sell copies of the Software, and to +# permit persons to whom the Software is furnished to do so, subject to +# the following conditions: +# +# The above copyright notice and this permission notice shall be +# included in all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +# + + +if sys.version_info >= (3, 8): + from functools import cached_property +else: + + class cached_property: + def __init__(self, func): + self._func = func + + def __get__(self, instance, owner=None): + ret = instance.__dict__[self._func.__name__] = self._func(instance) + return ret + + +class __compat__(__config_flags): + """ + A cross-version compatibility configuration for pyparsing features that will be + released in a future version. By setting values in this configuration to True, + those features can be enabled in prior versions for compatibility development + and testing. + + - ``collect_all_And_tokens`` - flag to enable fix for Issue #63 that fixes erroneous grouping + of results names when an :class:`And` expression is nested within an :class:`Or` or :class:`MatchFirst`; + maintained for compatibility, but setting to ``False`` no longer restores pre-2.3.1 + behavior + """ + + _type_desc = "compatibility" + + collect_all_And_tokens = True + + _all_names = [__ for __ in locals() if not __.startswith("_")] + _fixed_names = """ + collect_all_And_tokens + """.split() + + +class __diag__(__config_flags): + _type_desc = "diagnostic" + + warn_multiple_tokens_in_named_alternation = False + warn_ungrouped_named_tokens_in_collection = False + warn_name_set_on_empty_Forward = False + warn_on_parse_using_empty_Forward = False + warn_on_assignment_to_Forward = False + warn_on_multiple_string_args_to_oneof = False + warn_on_match_first_with_lshift_operator = False + enable_debug_on_named_expressions = False + + _all_names = [__ for __ in locals() if not __.startswith("_")] + _warning_names = [name for name in _all_names if name.startswith("warn")] + _debug_names = [name for name in _all_names if name.startswith("enable_debug")] + + @classmethod + def enable_all_warnings(cls) -> None: + for name in cls._warning_names: + cls.enable(name) + + +class Diagnostics(Enum): + """ + Diagnostic configuration (all default to disabled) + - ``warn_multiple_tokens_in_named_alternation`` - flag to enable warnings when a results + name is defined on a :class:`MatchFirst` or :class:`Or` expression with one or more :class:`And` subexpressions + - ``warn_ungrouped_named_tokens_in_collection`` - flag to enable warnings when a results + name is defined on a containing expression with ungrouped subexpressions that also + have results names + - ``warn_name_set_on_empty_Forward`` - flag to enable warnings when a :class:`Forward` is defined + with a results name, but has no contents defined + - ``warn_on_parse_using_empty_Forward`` - flag to enable warnings when a :class:`Forward` is + defined in a grammar but has never had an expression attached to it + - ``warn_on_assignment_to_Forward`` - flag to enable warnings when a :class:`Forward` is defined + but is overwritten by assigning using ``'='`` instead of ``'<<='`` or ``'<<'`` + - ``warn_on_multiple_string_args_to_oneof`` - flag to enable warnings when :class:`one_of` is + incorrectly called with multiple str arguments + - ``enable_debug_on_named_expressions`` - flag to auto-enable debug on all subsequent + calls to :class:`ParserElement.set_name` + + Diagnostics are enabled/disabled by calling :class:`enable_diag` and :class:`disable_diag`. + All warnings can be enabled by calling :class:`enable_all_warnings`. + """ + + warn_multiple_tokens_in_named_alternation = 0 + warn_ungrouped_named_tokens_in_collection = 1 + warn_name_set_on_empty_Forward = 2 + warn_on_parse_using_empty_Forward = 3 + warn_on_assignment_to_Forward = 4 + warn_on_multiple_string_args_to_oneof = 5 + warn_on_match_first_with_lshift_operator = 6 + enable_debug_on_named_expressions = 7 + + +def enable_diag(diag_enum: Diagnostics) -> None: + """ + Enable a global pyparsing diagnostic flag (see :class:`Diagnostics`). + """ + __diag__.enable(diag_enum.name) + + +def disable_diag(diag_enum: Diagnostics) -> None: + """ + Disable a global pyparsing diagnostic flag (see :class:`Diagnostics`). + """ + __diag__.disable(diag_enum.name) + + +def enable_all_warnings() -> None: + """ + Enable all global pyparsing diagnostic warnings (see :class:`Diagnostics`). + """ + __diag__.enable_all_warnings() + + +# hide abstract class +del __config_flags + + +def _should_enable_warnings( + cmd_line_warn_options: IterableType[str], warn_env_var: OptionalType[str] +) -> bool: + enable = bool(warn_env_var) + for warn_opt in cmd_line_warn_options: + w_action, w_message, w_category, w_module, w_line = (warn_opt + "::::").split( + ":" + )[:5] + if not w_action.lower().startswith("i") and ( + not (w_message or w_category or w_module) or w_module == "pyparsing" + ): + enable = True + elif w_action.lower().startswith("i") and w_module in ("pyparsing", ""): + enable = False + return enable + + +if _should_enable_warnings( + sys.warnoptions, os.environ.get("PYPARSINGENABLEALLWARNINGS") +): + enable_all_warnings() + + +# build list of single arg builtins, that can be used as parse actions +_single_arg_builtins = { + sum, + len, + sorted, + reversed, + list, + tuple, + set, + any, + all, + min, + max, +} + +_generatorType = types.GeneratorType +ParseAction = Union[ + Callable[[], Any], + Callable[[ParseResults], Any], + Callable[[int, ParseResults], Any], + Callable[[str, int, ParseResults], Any], +] +ParseCondition = Union[ + Callable[[], bool], + Callable[[ParseResults], bool], + Callable[[int, ParseResults], bool], + Callable[[str, int, ParseResults], bool], +] +ParseFailAction = Callable[[str, int, "ParserElement", Exception], None] +DebugStartAction = Callable[[str, int, "ParserElement", bool], None] +DebugSuccessAction = Callable[ + [str, int, int, "ParserElement", ParseResults, bool], None +] +DebugExceptionAction = Callable[[str, int, "ParserElement", Exception, bool], None] + + +alphas = string.ascii_uppercase + string.ascii_lowercase +identchars = pyparsing_unicode.Latin1.identchars +identbodychars = pyparsing_unicode.Latin1.identbodychars +nums = "0123456789" +hexnums = nums + "ABCDEFabcdef" +alphanums = alphas + nums +printables = "".join([c for c in string.printable if c not in string.whitespace]) + +_trim_arity_call_line: traceback.StackSummary = None + + +def _trim_arity(func, max_limit=3): + """decorator to trim function calls to match the arity of the target""" + global _trim_arity_call_line + + if func in _single_arg_builtins: + return lambda s, l, t: func(t) + + limit = 0 + found_arity = False + + def extract_tb(tb, limit=0): + frames = traceback.extract_tb(tb, limit=limit) + frame_summary = frames[-1] + return [frame_summary[:2]] + + # synthesize what would be returned by traceback.extract_stack at the call to + # user's parse action 'func', so that we don't incur call penalty at parse time + + # fmt: off + LINE_DIFF = 7 + # IF ANY CODE CHANGES, EVEN JUST COMMENTS OR BLANK LINES, BETWEEN THE NEXT LINE AND + # THE CALL TO FUNC INSIDE WRAPPER, LINE_DIFF MUST BE MODIFIED!!!! + _trim_arity_call_line = (_trim_arity_call_line or traceback.extract_stack(limit=2)[-1]) + pa_call_line_synth = (_trim_arity_call_line[0], _trim_arity_call_line[1] + LINE_DIFF) + + def wrapper(*args): + nonlocal found_arity, limit + while 1: + try: + ret = func(*args[limit:]) + found_arity = True + return ret + except TypeError as te: + # re-raise TypeErrors if they did not come from our arity testing + if found_arity: + raise + else: + tb = te.__traceback__ + trim_arity_type_error = ( + extract_tb(tb, limit=2)[-1][:2] == pa_call_line_synth + ) + del tb + + if trim_arity_type_error: + if limit < max_limit: + limit += 1 + continue + + raise + # fmt: on + + # copy func name to wrapper for sensible debug output + # (can't use functools.wraps, since that messes with function signature) + func_name = getattr(func, "__name__", getattr(func, "__class__").__name__) + wrapper.__name__ = func_name + wrapper.__doc__ = func.__doc__ + + return wrapper + + +def condition_as_parse_action( + fn: ParseCondition, message: str = None, fatal: bool = False +) -> ParseAction: + """ + Function to convert a simple predicate function that returns ``True`` or ``False`` + into a parse action. Can be used in places when a parse action is required + and :class:`ParserElement.add_condition` cannot be used (such as when adding a condition + to an operator level in :class:`infix_notation`). + + Optional keyword arguments: + + - ``message`` - define a custom message to be used in the raised exception + - ``fatal`` - if True, will raise :class:`ParseFatalException` to stop parsing immediately; + otherwise will raise :class:`ParseException` + + """ + msg = message if message is not None else "failed user-defined condition" + exc_type = ParseFatalException if fatal else ParseException + fn = _trim_arity(fn) + + @wraps(fn) + def pa(s, l, t): + if not bool(fn(s, l, t)): + raise exc_type(s, l, msg) + + return pa + + +def _default_start_debug_action( + instring: str, loc: int, expr: "ParserElement", cache_hit: bool = False +): + cache_hit_str = "*" if cache_hit else "" + print( + ( + "{}Match {} at loc {}({},{})\n {}\n {}^".format( + cache_hit_str, + expr, + loc, + lineno(loc, instring), + col(loc, instring), + line(loc, instring), + " " * (col(loc, instring) - 1), + ) + ) + ) + + +def _default_success_debug_action( + instring: str, + startloc: int, + endloc: int, + expr: "ParserElement", + toks: ParseResults, + cache_hit: bool = False, +): + cache_hit_str = "*" if cache_hit else "" + print("{}Matched {} -> {}".format(cache_hit_str, expr, toks.as_list())) + + +def _default_exception_debug_action( + instring: str, + loc: int, + expr: "ParserElement", + exc: Exception, + cache_hit: bool = False, +): + cache_hit_str = "*" if cache_hit else "" + print( + "{}Match {} failed, {} raised: {}".format( + cache_hit_str, expr, type(exc).__name__, exc + ) + ) + + +def null_debug_action(*args): + """'Do-nothing' debug action, to suppress debugging output during parsing.""" + + +class ParserElement(ABC): + """Abstract base level parser element class.""" + + DEFAULT_WHITE_CHARS: str = " \n\t\r" + verbose_stacktrace: bool = False + _literalStringClass: OptionalType[type] = None + + @staticmethod + def set_default_whitespace_chars(chars: str) -> None: + r""" + Overrides the default whitespace chars + + Example:: + + # default whitespace chars are space, and newline + OneOrMore(Word(alphas)).parse_string("abc def\nghi jkl") # -> ['abc', 'def', 'ghi', 'jkl'] + + # change to just treat newline as significant + ParserElement.set_default_whitespace_chars(" \t") + OneOrMore(Word(alphas)).parse_string("abc def\nghi jkl") # -> ['abc', 'def'] + """ + ParserElement.DEFAULT_WHITE_CHARS = chars + + # update whitespace all parse expressions defined in this module + for expr in _builtin_exprs: + if expr.copyDefaultWhiteChars: + expr.whiteChars = set(chars) + + @staticmethod + def inline_literals_using(cls: type) -> None: + """ + Set class to be used for inclusion of string literals into a parser. + + Example:: + + # default literal class used is Literal + integer = Word(nums) + date_str = integer("year") + '/' + integer("month") + '/' + integer("day") + + date_str.parse_string("1999/12/31") # -> ['1999', '/', '12', '/', '31'] + + + # change to Suppress + ParserElement.inline_literals_using(Suppress) + date_str = integer("year") + '/' + integer("month") + '/' + integer("day") + + date_str.parse_string("1999/12/31") # -> ['1999', '12', '31'] + """ + ParserElement._literalStringClass = cls + + class DebugActions(NamedTuple): + debug_try: OptionalType[DebugStartAction] + debug_match: OptionalType[DebugSuccessAction] + debug_fail: OptionalType[DebugExceptionAction] + + def __init__(self, savelist: bool = False): + self.parseAction: List[ParseAction] = list() + self.failAction: OptionalType[ParseFailAction] = None + self.customName = None + self._defaultName = None + self.resultsName = None + self.saveAsList = savelist + self.skipWhitespace = True + self.whiteChars = set(ParserElement.DEFAULT_WHITE_CHARS) + self.copyDefaultWhiteChars = True + # used when checking for left-recursion + self.mayReturnEmpty = False + self.keepTabs = False + self.ignoreExprs: List["ParserElement"] = list() + self.debug = False + self.streamlined = False + # optimize exception handling for subclasses that don't advance parse index + self.mayIndexError = True + self.errmsg = "" + # mark results names as modal (report only last) or cumulative (list all) + self.modalResults = True + # custom debug actions + self.debugActions = self.DebugActions(None, None, None) + # avoid redundant calls to preParse + self.callPreparse = True + self.callDuringTry = False + self.suppress_warnings_: List[Diagnostics] = [] + + def suppress_warning(self, warning_type: Diagnostics) -> "ParserElement": + """ + Suppress warnings emitted for a particular diagnostic on this expression. + + Example:: + + base = pp.Forward() + base.suppress_warning(Diagnostics.warn_on_parse_using_empty_Forward) + + # statement would normally raise a warning, but is now suppressed + print(base.parseString("x")) + + """ + self.suppress_warnings_.append(warning_type) + return self + + def copy(self) -> "ParserElement": + """ + Make a copy of this :class:`ParserElement`. Useful for defining + different parse actions for the same parsing pattern, using copies of + the original parse element. + + Example:: + + integer = Word(nums).set_parse_action(lambda toks: int(toks[0])) + integerK = integer.copy().add_parse_action(lambda toks: toks[0] * 1024) + Suppress("K") + integerM = integer.copy().add_parse_action(lambda toks: toks[0] * 1024 * 1024) + Suppress("M") + + print(OneOrMore(integerK | integerM | integer).parse_string("5K 100 640K 256M")) + + prints:: + + [5120, 100, 655360, 268435456] + + Equivalent form of ``expr.copy()`` is just ``expr()``:: + + integerM = integer().add_parse_action(lambda toks: toks[0] * 1024 * 1024) + Suppress("M") + """ + cpy = copy.copy(self) + cpy.parseAction = self.parseAction[:] + cpy.ignoreExprs = self.ignoreExprs[:] + if self.copyDefaultWhiteChars: + cpy.whiteChars = set(ParserElement.DEFAULT_WHITE_CHARS) + return cpy + + def set_results_name( + self, name: str, list_all_matches: bool = False, *, listAllMatches: bool = False + ) -> "ParserElement": + """ + Define name for referencing matching tokens as a nested attribute + of the returned parse results. + + Normally, results names are assigned as you would assign keys in a dict: + any existing value is overwritten by later values. If it is necessary to + keep all values captured for a particular results name, call ``set_results_name`` + with ``list_all_matches`` = True. + + NOTE: ``set_results_name`` returns a *copy* of the original :class:`ParserElement` object; + this is so that the client can define a basic element, such as an + integer, and reference it in multiple places with different names. + + You can also set results names using the abbreviated syntax, + ``expr("name")`` in place of ``expr.set_results_name("name")`` + - see :class:`__call__`. If ``list_all_matches`` is required, use + ``expr("name*")``. + + Example:: + + date_str = (integer.set_results_name("year") + '/' + + integer.set_results_name("month") + '/' + + integer.set_results_name("day")) + + # equivalent form: + date_str = integer("year") + '/' + integer("month") + '/' + integer("day") + """ + listAllMatches = listAllMatches or list_all_matches + return self._setResultsName(name, listAllMatches) + + def _setResultsName(self, name, listAllMatches=False): + if name is None: + return self + newself = self.copy() + if name.endswith("*"): + name = name[:-1] + listAllMatches = True + newself.resultsName = name + newself.modalResults = not listAllMatches + return newself + + def set_break(self, break_flag: bool = True) -> "ParserElement": + """ + Method to invoke the Python pdb debugger when this element is + about to be parsed. Set ``break_flag`` to ``True`` to enable, ``False`` to + disable. + """ + if break_flag: + _parseMethod = self._parse + + def breaker(instring, loc, doActions=True, callPreParse=True): + import pdb + + # this call to pdb.set_trace() is intentional, not a checkin error + pdb.set_trace() + return _parseMethod(instring, loc, doActions, callPreParse) + + breaker._originalParseMethod = _parseMethod + self._parse = breaker + else: + if hasattr(self._parse, "_originalParseMethod"): + self._parse = self._parse._originalParseMethod + return self + + def set_parse_action(self, *fns: ParseAction, **kwargs) -> "ParserElement": + """ + Define one or more actions to perform when successfully matching parse element definition. + + Parse actions can be called to perform data conversions, do extra validation, + update external data structures, or enhance or replace the parsed tokens. + Each parse action ``fn`` is a callable method with 0-3 arguments, called as + ``fn(s, loc, toks)`` , ``fn(loc, toks)`` , ``fn(toks)`` , or just ``fn()`` , where: + + - s = the original string being parsed (see note below) + - loc = the location of the matching substring + - toks = a list of the matched tokens, packaged as a :class:`ParseResults` object + + The parsed tokens are passed to the parse action as ParseResults. They can be + modified in place using list-style append, extend, and pop operations to update + the parsed list elements; and with dictionary-style item set and del operations + to add, update, or remove any named results. If the tokens are modified in place, + it is not necessary to return them with a return statement. + + Parse actions can also completely replace the given tokens, with another ``ParseResults`` + object, or with some entirely different object (common for parse actions that perform data + conversions). A convenient way to build a new parse result is to define the values + using a dict, and then create the return value using :class:`ParseResults.from_dict`. + + If None is passed as the ``fn`` parse action, all previously added parse actions for this + expression are cleared. + + Optional keyword arguments: + + - call_during_try = (default= ``False``) indicate if parse action should be run during + lookaheads and alternate testing. For parse actions that have side effects, it is + important to only call the parse action once it is determined that it is being + called as part of a successful parse. For parse actions that perform additional + validation, then call_during_try should be passed as True, so that the validation + code is included in the preliminary "try" parses. + + Note: the default parsing behavior is to expand tabs in the input string + before starting the parsing process. See :class:`parse_string` for more + information on parsing strings containing ```` s, and suggested + methods to maintain a consistent view of the parsed string, the parse + location, and line and column positions within the parsed string. + + Example:: + + # parse dates in the form YYYY/MM/DD + + # use parse action to convert toks from str to int at parse time + def convert_to_int(toks): + return int(toks[0]) + + # use a parse action to verify that the date is a valid date + def is_valid_date(instring, loc, toks): + from datetime import date + year, month, day = toks[::2] + try: + date(year, month, day) + except ValueError: + raise ParseException(instring, loc, "invalid date given") + + integer = Word(nums) + date_str = integer + '/' + integer + '/' + integer + + # add parse actions + integer.set_parse_action(convert_to_int) + date_str.set_parse_action(is_valid_date) + + # note that integer fields are now ints, not strings + date_str.run_tests(''' + # successful parse - note that integer fields were converted to ints + 1999/12/31 + + # fail - invalid date + 1999/13/31 + ''') + """ + if list(fns) == [None]: + self.parseAction = [] + else: + if not all(callable(fn) for fn in fns): + raise TypeError("parse actions must be callable") + self.parseAction = [_trim_arity(fn) for fn in fns] + self.callDuringTry = kwargs.get( + "call_during_try", kwargs.get("callDuringTry", False) + ) + return self + + def add_parse_action(self, *fns: ParseAction, **kwargs) -> "ParserElement": + """ + Add one or more parse actions to expression's list of parse actions. See :class:`set_parse_action`. + + See examples in :class:`copy`. + """ + self.parseAction += [_trim_arity(fn) for fn in fns] + self.callDuringTry = self.callDuringTry or kwargs.get( + "call_during_try", kwargs.get("callDuringTry", False) + ) + return self + + def add_condition(self, *fns: ParseCondition, **kwargs) -> "ParserElement": + """Add a boolean predicate function to expression's list of parse actions. See + :class:`set_parse_action` for function call signatures. Unlike ``set_parse_action``, + functions passed to ``add_condition`` need to return boolean success/fail of the condition. + + Optional keyword arguments: + + - message = define a custom message to be used in the raised exception + - fatal = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise + ParseException + - call_during_try = boolean to indicate if this method should be called during internal tryParse calls, + default=False + + Example:: + + integer = Word(nums).set_parse_action(lambda toks: int(toks[0])) + year_int = integer.copy() + year_int.add_condition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later") + date_str = year_int + '/' + integer + '/' + integer + + result = date_str.parse_string("1999/12/31") # -> Exception: Only support years 2000 and later (at char 0), + (line:1, col:1) + """ + for fn in fns: + self.parseAction.append( + condition_as_parse_action( + fn, message=kwargs.get("message"), fatal=kwargs.get("fatal", False) + ) + ) + + self.callDuringTry = self.callDuringTry or kwargs.get( + "call_during_try", kwargs.get("callDuringTry", False) + ) + return self + + def set_fail_action(self, fn: ParseFailAction) -> "ParserElement": + """ + Define action to perform if parsing fails at this expression. + Fail acton fn is a callable function that takes the arguments + ``fn(s, loc, expr, err)`` where: + + - s = string being parsed + - loc = location where expression match was attempted and failed + - expr = the parse expression that failed + - err = the exception thrown + + The function returns no value. It may throw :class:`ParseFatalException` + if it is desired to stop parsing immediately.""" + self.failAction = fn + return self + + def _skipIgnorables(self, instring, loc): + exprsFound = True + while exprsFound: + exprsFound = False + for e in self.ignoreExprs: + try: + while 1: + loc, dummy = e._parse(instring, loc) + exprsFound = True + except ParseException: + pass + return loc + + def preParse(self, instring, loc): + if self.ignoreExprs: + loc = self._skipIgnorables(instring, loc) + + if self.skipWhitespace: + instrlen = len(instring) + white_chars = self.whiteChars + while loc < instrlen and instring[loc] in white_chars: + loc += 1 + + return loc + + def parseImpl(self, instring, loc, doActions=True): + return loc, [] + + def postParse(self, instring, loc, tokenlist): + return tokenlist + + # @profile + def _parseNoCache( + self, instring, loc, doActions=True, callPreParse=True + ) -> Tuple[int, ParseResults]: + TRY, MATCH, FAIL = 0, 1, 2 + debugging = self.debug # and doActions) + len_instring = len(instring) + + if debugging or self.failAction: + # print("Match {} at loc {}({}, {})".format(self, loc, lineno(loc, instring), col(loc, instring))) + try: + if callPreParse and self.callPreparse: + pre_loc = self.preParse(instring, loc) + else: + pre_loc = loc + tokens_start = pre_loc + if self.debugActions.debug_try: + self.debugActions.debug_try(instring, tokens_start, self, False) + if self.mayIndexError or pre_loc >= len_instring: + try: + loc, tokens = self.parseImpl(instring, pre_loc, doActions) + except IndexError: + raise ParseException(instring, len_instring, self.errmsg, self) + else: + loc, tokens = self.parseImpl(instring, pre_loc, doActions) + except Exception as err: + # print("Exception raised:", err) + if self.debugActions.debug_fail: + self.debugActions.debug_fail( + instring, tokens_start, self, err, False + ) + if self.failAction: + self.failAction(instring, tokens_start, self, err) + raise + else: + if callPreParse and self.callPreparse: + pre_loc = self.preParse(instring, loc) + else: + pre_loc = loc + tokens_start = pre_loc + if self.mayIndexError or pre_loc >= len_instring: + try: + loc, tokens = self.parseImpl(instring, pre_loc, doActions) + except IndexError: + raise ParseException(instring, len_instring, self.errmsg, self) + else: + loc, tokens = self.parseImpl(instring, pre_loc, doActions) + + tokens = self.postParse(instring, loc, tokens) + + ret_tokens = ParseResults( + tokens, self.resultsName, asList=self.saveAsList, modal=self.modalResults + ) + if self.parseAction and (doActions or self.callDuringTry): + if debugging: + try: + for fn in self.parseAction: + try: + tokens = fn(instring, tokens_start, ret_tokens) + except IndexError as parse_action_exc: + exc = ParseException("exception raised in parse action") + raise exc from parse_action_exc + + if tokens is not None and tokens is not ret_tokens: + ret_tokens = ParseResults( + tokens, + self.resultsName, + asList=self.saveAsList + and isinstance(tokens, (ParseResults, list)), + modal=self.modalResults, + ) + except Exception as err: + # print "Exception raised in user parse action:", err + if self.debugActions.debug_fail: + self.debugActions.debug_fail( + instring, tokens_start, self, err, False + ) + raise + else: + for fn in self.parseAction: + try: + tokens = fn(instring, tokens_start, ret_tokens) + except IndexError as parse_action_exc: + exc = ParseException("exception raised in parse action") + raise exc from parse_action_exc + + if tokens is not None and tokens is not ret_tokens: + ret_tokens = ParseResults( + tokens, + self.resultsName, + asList=self.saveAsList + and isinstance(tokens, (ParseResults, list)), + modal=self.modalResults, + ) + if debugging: + # print("Matched", self, "->", ret_tokens.as_list()) + if self.debugActions.debug_match: + self.debugActions.debug_match( + instring, tokens_start, loc, self, ret_tokens, False + ) + + return loc, ret_tokens + + def try_parse(self, instring: str, loc: int, raise_fatal: bool = False) -> int: + try: + return self._parse(instring, loc, doActions=False)[0] + except ParseFatalException: + if raise_fatal: + raise + raise ParseException(instring, loc, self.errmsg, self) + + def can_parse_next(self, instring: str, loc: int) -> bool: + try: + self.try_parse(instring, loc) + except (ParseException, IndexError): + return False + else: + return True + + # cache for left-recursion in Forward references + recursion_lock = RLock() + recursion_memos: DictType[ + Tuple[int, "Forward", bool], Tuple[int, Union[ParseResults, Exception]] + ] = {} + + # argument cache for optimizing repeated calls when backtracking through recursive expressions + packrat_cache = ( + {} + ) # this is set later by enabled_packrat(); this is here so that reset_cache() doesn't fail + packrat_cache_lock = RLock() + packrat_cache_stats = [0, 0] + + # this method gets repeatedly called during backtracking with the same arguments - + # we can cache these arguments and save ourselves the trouble of re-parsing the contained expression + def _parseCache( + self, instring, loc, doActions=True, callPreParse=True + ) -> Tuple[int, ParseResults]: + HIT, MISS = 0, 1 + TRY, MATCH, FAIL = 0, 1, 2 + lookup = (self, instring, loc, callPreParse, doActions) + with ParserElement.packrat_cache_lock: + cache = ParserElement.packrat_cache + value = cache.get(lookup) + if value is cache.not_in_cache: + ParserElement.packrat_cache_stats[MISS] += 1 + try: + value = self._parseNoCache(instring, loc, doActions, callPreParse) + except ParseBaseException as pe: + # cache a copy of the exception, without the traceback + cache.set(lookup, pe.__class__(*pe.args)) + raise + else: + cache.set(lookup, (value[0], value[1].copy(), loc)) + return value + else: + ParserElement.packrat_cache_stats[HIT] += 1 + if self.debug and self.debugActions.debug_try: + try: + self.debugActions.debug_try(instring, loc, self, cache_hit=True) + except TypeError: + pass + if isinstance(value, Exception): + if self.debug and self.debugActions.debug_fail: + try: + self.debugActions.debug_fail( + instring, loc, self, value, cache_hit=True + ) + except TypeError: + pass + raise value + + loc_, result, endloc = value[0], value[1].copy(), value[2] + if self.debug and self.debugActions.debug_match: + try: + self.debugActions.debug_match( + instring, loc_, endloc, self, result, cache_hit=True + ) + except TypeError: + pass + + return loc_, result + + _parse = _parseNoCache + + @staticmethod + def reset_cache() -> None: + ParserElement.packrat_cache.clear() + ParserElement.packrat_cache_stats[:] = [0] * len( + ParserElement.packrat_cache_stats + ) + ParserElement.recursion_memos.clear() + + _packratEnabled = False + _left_recursion_enabled = False + + @staticmethod + def disable_memoization() -> None: + """ + Disables active Packrat or Left Recursion parsing and their memoization + + This method also works if neither Packrat nor Left Recursion are enabled. + This makes it safe to call before activating Packrat nor Left Recursion + to clear any previous settings. + """ + ParserElement.reset_cache() + ParserElement._left_recursion_enabled = False + ParserElement._packratEnabled = False + ParserElement._parse = ParserElement._parseNoCache + + @staticmethod + def enable_left_recursion( + cache_size_limit: OptionalType[int] = None, *, force=False + ) -> None: + """ + Enables "bounded recursion" parsing, which allows for both direct and indirect + left-recursion. During parsing, left-recursive :class:`Forward` elements are + repeatedly matched with a fixed recursion depth that is gradually increased + until finding the longest match. + + Example:: + + import pyparsing as pp + pp.ParserElement.enable_left_recursion() + + E = pp.Forward("E") + num = pp.Word(pp.nums) + # match `num`, or `num '+' num`, or `num '+' num '+' num`, ... + E <<= E + '+' - num | num + + print(E.parse_string("1+2+3")) + + Recursion search naturally memoizes matches of ``Forward`` elements and may + thus skip reevaluation of parse actions during backtracking. This may break + programs with parse actions which rely on strict ordering of side-effects. + + Parameters: + + - cache_size_limit - (default=``None``) - memoize at most this many + ``Forward`` elements during matching; if ``None`` (the default), + memoize all ``Forward`` elements. + + Bounded Recursion parsing works similar but not identical to Packrat parsing, + thus the two cannot be used together. Use ``force=True`` to disable any + previous, conflicting settings. + """ + if force: + ParserElement.disable_memoization() + elif ParserElement._packratEnabled: + raise RuntimeError("Packrat and Bounded Recursion are not compatible") + if cache_size_limit is None: + ParserElement.recursion_memos = _UnboundedMemo() + elif cache_size_limit > 0: + ParserElement.recursion_memos = _LRUMemo(capacity=cache_size_limit) + else: + raise NotImplementedError("Memo size of %s" % cache_size_limit) + ParserElement._left_recursion_enabled = True + + @staticmethod + def enable_packrat(cache_size_limit: int = 128, *, force: bool = False) -> None: + """ + Enables "packrat" parsing, which adds memoizing to the parsing logic. + Repeated parse attempts at the same string location (which happens + often in many complex grammars) can immediately return a cached value, + instead of re-executing parsing/validating code. Memoizing is done of + both valid results and parsing exceptions. + + Parameters: + + - cache_size_limit - (default= ``128``) - if an integer value is provided + will limit the size of the packrat cache; if None is passed, then + the cache size will be unbounded; if 0 is passed, the cache will + be effectively disabled. + + This speedup may break existing programs that use parse actions that + have side-effects. For this reason, packrat parsing is disabled when + you first import pyparsing. To activate the packrat feature, your + program must call the class method :class:`ParserElement.enable_packrat`. + For best results, call ``enable_packrat()`` immediately after + importing pyparsing. + + Example:: + + import pyparsing + pyparsing.ParserElement.enable_packrat() + + Packrat parsing works similar but not identical to Bounded Recursion parsing, + thus the two cannot be used together. Use ``force=True`` to disable any + previous, conflicting settings. + """ + if force: + ParserElement.disable_memoization() + elif ParserElement._left_recursion_enabled: + raise RuntimeError("Packrat and Bounded Recursion are not compatible") + if not ParserElement._packratEnabled: + ParserElement._packratEnabled = True + if cache_size_limit is None: + ParserElement.packrat_cache = _UnboundedCache() + else: + ParserElement.packrat_cache = _FifoCache(cache_size_limit) + ParserElement._parse = ParserElement._parseCache + + def parse_string( + self, instring: str, parse_all: bool = False, *, parseAll: bool = False + ) -> ParseResults: + """ + Parse a string with respect to the parser definition. This function is intended as the primary interface to the + client code. + + :param instring: The input string to be parsed. + :param parse_all: If set, the entire input string must match the grammar. + :param parseAll: retained for pre-PEP8 compatibility, will be removed in a future release. + :raises ParseException: Raised if ``parse_all`` is set and the input string does not match the whole grammar. + :returns: the parsed data as a :class:`ParseResults` object, which may be accessed as a `list`, a `dict`, or + an object with attributes if the given parser includes results names. + + If the input string is required to match the entire grammar, ``parse_all`` flag must be set to ``True``. This + is also equivalent to ending the grammar with :class:`StringEnd`(). + + To report proper column numbers, ``parse_string`` operates on a copy of the input string where all tabs are + converted to spaces (8 spaces per tab, as per the default in ``string.expandtabs``). If the input string + contains tabs and the grammar uses parse actions that use the ``loc`` argument to index into the string + being parsed, one can ensure a consistent view of the input string by doing one of the following: + + - calling ``parse_with_tabs`` on your grammar before calling ``parse_string`` (see :class:`parse_with_tabs`), + - define your parse action using the full ``(s,loc,toks)`` signature, and reference the input string using the + parse action's ``s`` argument, or + - explicitly expand the tabs in your input string before calling ``parse_string``. + + Examples: + + By default, partial matches are OK. + + >>> res = Word('a').parse_string('aaaaabaaa') + >>> print(res) + ['aaaaa'] + + The parsing behavior varies by the inheriting class of this abstract class. Please refer to the children + directly to see more examples. + + It raises an exception if parse_all flag is set and instring does not match the whole grammar. + + >>> res = Word('a').parse_string('aaaaabaaa', parse_all=True) + Traceback (most recent call last): + ... + pyparsing.ParseException: Expected end of text, found 'b' (at char 5), (line:1, col:6) + """ + parseAll = parse_all or parseAll + + ParserElement.reset_cache() + if not self.streamlined: + self.streamline() + for e in self.ignoreExprs: + e.streamline() + if not self.keepTabs: + instring = instring.expandtabs() + try: + loc, tokens = self._parse(instring, 0) + if parseAll: + loc = self.preParse(instring, loc) + se = Empty() + StringEnd() + se._parse(instring, loc) + except ParseBaseException as exc: + if ParserElement.verbose_stacktrace: + raise + else: + # catch and re-raise exception from here, clearing out pyparsing internal stack trace + raise exc.with_traceback(None) + else: + return tokens + + def scan_string( + self, + instring: str, + max_matches: int = _MAX_INT, + overlap: bool = False, + *, + debug: bool = False, + maxMatches: int = _MAX_INT, + ) -> Generator[Tuple[ParseResults, int, int], None, None]: + """ + Scan the input string for expression matches. Each match will return the + matching tokens, start location, and end location. May be called with optional + ``max_matches`` argument, to clip scanning after 'n' matches are found. If + ``overlap`` is specified, then overlapping matches will be reported. + + Note that the start and end locations are reported relative to the string + being parsed. See :class:`parse_string` for more information on parsing + strings with embedded tabs. + + Example:: + + source = "sldjf123lsdjjkf345sldkjf879lkjsfd987" + print(source) + for tokens, start, end in Word(alphas).scan_string(source): + print(' '*start + '^'*(end-start)) + print(' '*start + tokens[0]) + + prints:: + + sldjf123lsdjjkf345sldkjf879lkjsfd987 + ^^^^^ + sldjf + ^^^^^^^ + lsdjjkf + ^^^^^^ + sldkjf + ^^^^^^ + lkjsfd + """ + maxMatches = min(maxMatches, max_matches) + if not self.streamlined: + self.streamline() + for e in self.ignoreExprs: + e.streamline() + + if not self.keepTabs: + instring = str(instring).expandtabs() + instrlen = len(instring) + loc = 0 + preparseFn = self.preParse + parseFn = self._parse + ParserElement.resetCache() + matches = 0 + try: + while loc <= instrlen and matches < maxMatches: + try: + preloc = preparseFn(instring, loc) + nextLoc, tokens = parseFn(instring, preloc, callPreParse=False) + except ParseException: + loc = preloc + 1 + else: + if nextLoc > loc: + matches += 1 + if debug: + print( + { + "tokens": tokens.asList(), + "start": preloc, + "end": nextLoc, + } + ) + yield tokens, preloc, nextLoc + if overlap: + nextloc = preparseFn(instring, loc) + if nextloc > loc: + loc = nextLoc + else: + loc += 1 + else: + loc = nextLoc + else: + loc = preloc + 1 + except ParseBaseException as exc: + if ParserElement.verbose_stacktrace: + raise + else: + # catch and re-raise exception from here, clears out pyparsing internal stack trace + raise exc.with_traceback(None) + + def transform_string(self, instring: str, *, debug: bool = False) -> str: + """ + Extension to :class:`scan_string`, to modify matching text with modified tokens that may + be returned from a parse action. To use ``transform_string``, define a grammar and + attach a parse action to it that modifies the returned token list. + Invoking ``transform_string()`` on a target string will then scan for matches, + and replace the matched text patterns according to the logic in the parse + action. ``transform_string()`` returns the resulting transformed string. + + Example:: + + wd = Word(alphas) + wd.set_parse_action(lambda toks: toks[0].title()) + + print(wd.transform_string("now is the winter of our discontent made glorious summer by this sun of york.")) + + prints:: + + Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York. + """ + out: List[str] = [] + lastE = 0 + # force preservation of s, to minimize unwanted transformation of string, and to + # keep string locs straight between transform_string and scan_string + self.keepTabs = True + try: + for t, s, e in self.scan_string(instring, debug=debug): + out.append(instring[lastE:s]) + if t: + if isinstance(t, ParseResults): + out += t.as_list() + elif isinstance(t, Iterable) and not isinstance(t, str_type): + out.extend(t) + else: + out.append(t) + lastE = e + out.append(instring[lastE:]) + out = [o for o in out if o] + return "".join([str(s) for s in _flatten(out)]) + except ParseBaseException as exc: + if ParserElement.verbose_stacktrace: + raise + else: + # catch and re-raise exception from here, clears out pyparsing internal stack trace + raise exc.with_traceback(None) + + def search_string( + self, + instring: str, + max_matches: int = _MAX_INT, + *, + debug: bool = False, + maxMatches: int = _MAX_INT, + ) -> ParseResults: + """ + Another extension to :class:`scan_string`, simplifying the access to the tokens found + to match the given parse expression. May be called with optional + ``max_matches`` argument, to clip searching after 'n' matches are found. + + Example:: + + # a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters + cap_word = Word(alphas.upper(), alphas.lower()) + + print(cap_word.search_string("More than Iron, more than Lead, more than Gold I need Electricity")) + + # the sum() builtin can be used to merge results into a single ParseResults object + print(sum(cap_word.search_string("More than Iron, more than Lead, more than Gold I need Electricity"))) + + prints:: + + [['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']] + ['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity'] + """ + maxMatches = min(maxMatches, max_matches) + try: + return ParseResults( + [t for t, s, e in self.scan_string(instring, maxMatches, debug=debug)] + ) + except ParseBaseException as exc: + if ParserElement.verbose_stacktrace: + raise + else: + # catch and re-raise exception from here, clears out pyparsing internal stack trace + raise exc.with_traceback(None) + + def split( + self, + instring: str, + maxsplit: int = _MAX_INT, + include_separators: bool = False, + *, + includeSeparators=False, + ) -> Generator[str, None, None]: + """ + Generator method to split a string using the given expression as a separator. + May be called with optional ``maxsplit`` argument, to limit the number of splits; + and the optional ``include_separators`` argument (default= ``False``), if the separating + matching text should be included in the split results. + + Example:: + + punc = one_of(list(".,;:/-!?")) + print(list(punc.split("This, this?, this sentence, is badly punctuated!"))) + + prints:: + + ['This', ' this', '', ' this sentence', ' is badly punctuated', ''] + """ + includeSeparators = includeSeparators or include_separators + last = 0 + for t, s, e in self.scan_string(instring, max_matches=maxsplit): + yield instring[last:s] + if includeSeparators: + yield t[0] + last = e + yield instring[last:] + + def __add__(self, other) -> "ParserElement": + """ + Implementation of ``+`` operator - returns :class:`And`. Adding strings to a :class:`ParserElement` + converts them to :class:`Literal`s by default. + + Example:: + + greet = Word(alphas) + "," + Word(alphas) + "!" + hello = "Hello, World!" + print(hello, "->", greet.parse_string(hello)) + + prints:: + + Hello, World! -> ['Hello', ',', 'World', '!'] + + ``...`` may be used as a parse expression as a short form of :class:`SkipTo`. + + Literal('start') + ... + Literal('end') + + is equivalent to: + + Literal('start') + SkipTo('end')("_skipped*") + Literal('end') + + Note that the skipped text is returned with '_skipped' as a results name, + and to support having multiple skips in the same parser, the value returned is + a list of all skipped text. + """ + if other is Ellipsis: + return _PendingSkip(self) + + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return And([self, other]) + + def __radd__(self, other) -> "ParserElement": + """ + Implementation of ``+`` operator when left operand is not a :class:`ParserElement` + """ + if other is Ellipsis: + return SkipTo(self)("_skipped*") + self + + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return other + self + + def __sub__(self, other) -> "ParserElement": + """ + Implementation of ``-`` operator, returns :class:`And` with error stop + """ + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return self + And._ErrorStop() + other + + def __rsub__(self, other) -> "ParserElement": + """ + Implementation of ``-`` operator when left operand is not a :class:`ParserElement` + """ + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return other - self + + def __mul__(self, other) -> "ParserElement": + """ + Implementation of ``*`` operator, allows use of ``expr * 3`` in place of + ``expr + expr + expr``. Expressions may also be multiplied by a 2-integer + tuple, similar to ``{min, max}`` multipliers in regular expressions. Tuples + may also include ``None`` as in: + - ``expr*(n, None)`` or ``expr*(n, )`` is equivalent + to ``expr*n + ZeroOrMore(expr)`` + (read as "at least n instances of ``expr``") + - ``expr*(None, n)`` is equivalent to ``expr*(0, n)`` + (read as "0 to n instances of ``expr``") + - ``expr*(None, None)`` is equivalent to ``ZeroOrMore(expr)`` + - ``expr*(1, None)`` is equivalent to ``OneOrMore(expr)`` + + Note that ``expr*(None, n)`` does not raise an exception if + more than n exprs exist in the input stream; that is, + ``expr*(None, n)`` does not enforce a maximum number of expr + occurrences. If this behavior is desired, then write + ``expr*(None, n) + ~expr`` + """ + if other is Ellipsis: + other = (0, None) + elif isinstance(other, tuple) and other[:1] == (Ellipsis,): + other = ((0,) + other[1:] + (None,))[:2] + + if isinstance(other, int): + minElements, optElements = other, 0 + elif isinstance(other, tuple): + other = tuple(o if o is not Ellipsis else None for o in other) + other = (other + (None, None))[:2] + if other[0] is None: + other = (0, other[1]) + if isinstance(other[0], int) and other[1] is None: + if other[0] == 0: + return ZeroOrMore(self) + if other[0] == 1: + return OneOrMore(self) + else: + return self * other[0] + ZeroOrMore(self) + elif isinstance(other[0], int) and isinstance(other[1], int): + minElements, optElements = other + optElements -= minElements + else: + raise TypeError( + "cannot multiply ParserElement and ({}) objects".format( + ",".join(type(item).__name__ for item in other) + ) + ) + else: + raise TypeError( + "cannot multiply ParserElement and {} objects".format( + type(other).__name__ + ) + ) + + if minElements < 0: + raise ValueError("cannot multiply ParserElement by negative value") + if optElements < 0: + raise ValueError( + "second tuple value must be greater or equal to first tuple value" + ) + if minElements == optElements == 0: + return And([]) + + if optElements: + + def makeOptionalList(n): + if n > 1: + return Opt(self + makeOptionalList(n - 1)) + else: + return Opt(self) + + if minElements: + if minElements == 1: + ret = self + makeOptionalList(optElements) + else: + ret = And([self] * minElements) + makeOptionalList(optElements) + else: + ret = makeOptionalList(optElements) + else: + if minElements == 1: + ret = self + else: + ret = And([self] * minElements) + return ret + + def __rmul__(self, other) -> "ParserElement": + return self.__mul__(other) + + def __or__(self, other) -> "ParserElement": + """ + Implementation of ``|`` operator - returns :class:`MatchFirst` + """ + if other is Ellipsis: + return _PendingSkip(self, must_skip=True) + + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return MatchFirst([self, other]) + + def __ror__(self, other) -> "ParserElement": + """ + Implementation of ``|`` operator when left operand is not a :class:`ParserElement` + """ + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return other | self + + def __xor__(self, other) -> "ParserElement": + """ + Implementation of ``^`` operator - returns :class:`Or` + """ + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return Or([self, other]) + + def __rxor__(self, other) -> "ParserElement": + """ + Implementation of ``^`` operator when left operand is not a :class:`ParserElement` + """ + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return other ^ self + + def __and__(self, other) -> "ParserElement": + """ + Implementation of ``&`` operator - returns :class:`Each` + """ + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return Each([self, other]) + + def __rand__(self, other) -> "ParserElement": + """ + Implementation of ``&`` operator when left operand is not a :class:`ParserElement` + """ + if isinstance(other, str_type): + other = self._literalStringClass(other) + if not isinstance(other, ParserElement): + raise TypeError( + "Cannot combine element of type {} with ParserElement".format( + type(other).__name__ + ) + ) + return other & self + + def __invert__(self) -> "ParserElement": + """ + Implementation of ``~`` operator - returns :class:`NotAny` + """ + return NotAny(self) + + # disable __iter__ to override legacy use of sequential access to __getitem__ to + # iterate over a sequence + __iter__ = None + + def __getitem__(self, key): + """ + use ``[]`` indexing notation as a short form for expression repetition: + + - ``expr[n]`` is equivalent to ``expr*n`` + - ``expr[m, n]`` is equivalent to ``expr*(m, n)`` + - ``expr[n, ...]`` or ``expr[n,]`` is equivalent + to ``expr*n + ZeroOrMore(expr)`` + (read as "at least n instances of ``expr``") + - ``expr[..., n]`` is equivalent to ``expr*(0, n)`` + (read as "0 to n instances of ``expr``") + - ``expr[...]`` and ``expr[0, ...]`` are equivalent to ``ZeroOrMore(expr)`` + - ``expr[1, ...]`` is equivalent to ``OneOrMore(expr)`` + + ``None`` may be used in place of ``...``. + + Note that ``expr[..., n]`` and ``expr[m, n]``do not raise an exception + if more than ``n`` ``expr``s exist in the input stream. If this behavior is + desired, then write ``expr[..., n] + ~expr``. + """ + + # convert single arg keys to tuples + try: + if isinstance(key, str_type): + key = (key,) + iter(key) + except TypeError: + key = (key, key) + + if len(key) > 2: + raise TypeError( + "only 1 or 2 index arguments supported ({}{})".format( + key[:5], "... [{}]".format(len(key)) if len(key) > 5 else "" + ) + ) + + # clip to 2 elements + ret = self * tuple(key[:2]) + return ret + + def __call__(self, name: str = None) -> "ParserElement": + """ + Shortcut for :class:`set_results_name`, with ``list_all_matches=False``. + + If ``name`` is given with a trailing ``'*'`` character, then ``list_all_matches`` will be + passed as ``True``. + + If ``name` is omitted, same as calling :class:`copy`. + + Example:: + + # these are equivalent + userdata = Word(alphas).set_results_name("name") + Word(nums + "-").set_results_name("socsecno") + userdata = Word(alphas)("name") + Word(nums + "-")("socsecno") + """ + if name is not None: + return self._setResultsName(name) + else: + return self.copy() + + def suppress(self) -> "ParserElement": + """ + Suppresses the output of this :class:`ParserElement`; useful to keep punctuation from + cluttering up returned output. + """ + return Suppress(self) + + def ignore_whitespace(self, recursive: bool = True) -> "ParserElement": + """ + Enables the skipping of whitespace before matching the characters in the + :class:`ParserElement`'s defined pattern. + + :param recursive: If ``True`` (the default), also enable whitespace skipping in child elements (if any) + """ + self.skipWhitespace = True + return self + + def leave_whitespace(self, recursive: bool = True) -> "ParserElement": + """ + Disables the skipping of whitespace before matching the characters in the + :class:`ParserElement`'s defined pattern. This is normally only used internally by + the pyparsing module, but may be needed in some whitespace-sensitive grammars. + + :param recursive: If true (the default), also disable whitespace skipping in child elements (if any) + """ + self.skipWhitespace = False + return self + + def set_whitespace_chars( + self, chars: Union[Set[str], str], copy_defaults: bool = False + ) -> "ParserElement": + """ + Overrides the default whitespace chars + """ + self.skipWhitespace = True + self.whiteChars = set(chars) + self.copyDefaultWhiteChars = copy_defaults + return self + + def parse_with_tabs(self) -> "ParserElement": + """ + Overrides default behavior to expand ```` s to spaces before parsing the input string. + Must be called before ``parse_string`` when the input grammar contains elements that + match ```` characters. + """ + self.keepTabs = True + return self + + def ignore(self, other: "ParserElement") -> "ParserElement": + """ + Define expression to be ignored (e.g., comments) while doing pattern + matching; may be called repeatedly, to define multiple comment or other + ignorable patterns. + + Example:: + + patt = OneOrMore(Word(alphas)) + patt.parse_string('ablaj /* comment */ lskjd') + # -> ['ablaj'] + + patt.ignore(c_style_comment) + patt.parse_string('ablaj /* comment */ lskjd') + # -> ['ablaj', 'lskjd'] + """ + import typing + + if isinstance(other, str_type): + other = Suppress(other) + + if isinstance(other, Suppress): + if other not in self.ignoreExprs: + self.ignoreExprs.append(other) + else: + self.ignoreExprs.append(Suppress(other.copy())) + return self + + def set_debug_actions( + self, + start_action: DebugStartAction, + success_action: DebugSuccessAction, + exception_action: DebugExceptionAction, + ) -> "ParserElement": + """ + Customize display of debugging messages while doing pattern matching: + + - ``start_action`` - method to be called when an expression is about to be parsed; + should have the signature ``fn(input_string: str, location: int, expression: ParserElement, cache_hit: bool)`` + + - ``success_action`` - method to be called when an expression has successfully parsed; + should have the signature ``fn(input_string: str, start_location: int, end_location: int, expression: ParserELement, parsed_tokens: ParseResults, cache_hit: bool)`` + + - ``exception_action`` - method to be called when expression fails to parse; + should have the signature ``fn(input_string: str, location: int, expression: ParserElement, exception: Exception, cache_hit: bool)`` + """ + self.debugActions = self.DebugActions( + start_action or _default_start_debug_action, + success_action or _default_success_debug_action, + exception_action or _default_exception_debug_action, + ) + self.debug = True + return self + + def set_debug(self, flag: bool = True) -> "ParserElement": + """ + Enable display of debugging messages while doing pattern matching. + Set ``flag`` to ``True`` to enable, ``False`` to disable. + + Example:: + + wd = Word(alphas).set_name("alphaword") + integer = Word(nums).set_name("numword") + term = wd | integer + + # turn on debugging for wd + wd.set_debug() + + OneOrMore(term).parse_string("abc 123 xyz 890") + + prints:: + + Match alphaword at loc 0(1,1) + Matched alphaword -> ['abc'] + Match alphaword at loc 3(1,4) + Exception raised:Expected alphaword (at char 4), (line:1, col:5) + Match alphaword at loc 7(1,8) + Matched alphaword -> ['xyz'] + Match alphaword at loc 11(1,12) + Exception raised:Expected alphaword (at char 12), (line:1, col:13) + Match alphaword at loc 15(1,16) + Exception raised:Expected alphaword (at char 15), (line:1, col:16) + + The output shown is that produced by the default debug actions - custom debug actions can be + specified using :class:`set_debug_actions`. Prior to attempting + to match the ``wd`` expression, the debugging message ``"Match at loc (,)"`` + is shown. Then if the parse succeeds, a ``"Matched"`` message is shown, or an ``"Exception raised"`` + message is shown. Also note the use of :class:`set_name` to assign a human-readable name to the expression, + which makes debugging and exception messages easier to understand - for instance, the default + name created for the :class:`Word` expression without calling ``set_name`` is ``"W:(A-Za-z)"``. + """ + if flag: + self.set_debug_actions( + _default_start_debug_action, + _default_success_debug_action, + _default_exception_debug_action, + ) + else: + self.debug = False + return self + + @property + def default_name(self) -> str: + if self._defaultName is None: + self._defaultName = self._generateDefaultName() + return self._defaultName + + @abstractmethod + def _generateDefaultName(self): + """ + Child classes must define this method, which defines how the ``default_name`` is set. + """ + + def set_name(self, name: str) -> "ParserElement": + """ + Define name for this expression, makes debugging and exception messages clearer. + Example:: + Word(nums).parse_string("ABC") # -> Exception: Expected W:(0-9) (at char 0), (line:1, col:1) + Word(nums).set_name("integer").parse_string("ABC") # -> Exception: Expected integer (at char 0), (line:1, col:1) + """ + self.customName = name + self.errmsg = "Expected " + self.name + if __diag__.enable_debug_on_named_expressions: + self.set_debug() + return self + + @property + def name(self) -> str: + # This will use a user-defined name if available, but otherwise defaults back to the auto-generated name + return self.customName if self.customName is not None else self.default_name + + def __str__(self) -> str: + return self.name + + def __repr__(self) -> str: + return str(self) + + def streamline(self) -> "ParserElement": + self.streamlined = True + self._defaultName = None + return self + + def recurse(self) -> Sequence["ParserElement"]: + return [] + + def _checkRecursion(self, parseElementList): + subRecCheckList = parseElementList[:] + [self] + for e in self.recurse(): + e._checkRecursion(subRecCheckList) + + def validate(self, validateTrace=None) -> None: + """ + Check defined expressions for valid structure, check for infinite recursive definitions. + """ + self._checkRecursion([]) + + def parse_file( + self, + file_or_filename: Union[str, Path, TextIO], + encoding: str = "utf-8", + parse_all: bool = False, + *, + parseAll: bool = False, + ) -> ParseResults: + """ + Execute the parse expression on the given file or filename. + If a filename is specified (instead of a file object), + the entire file is opened, read, and closed before parsing. + """ + parseAll = parseAll or parse_all + try: + file_contents = file_or_filename.read() + except AttributeError: + with open(file_or_filename, "r", encoding=encoding) as f: + file_contents = f.read() + try: + return self.parse_string(file_contents, parseAll) + except ParseBaseException as exc: + if ParserElement.verbose_stacktrace: + raise + else: + # catch and re-raise exception from here, clears out pyparsing internal stack trace + raise exc.with_traceback(None) + + def __eq__(self, other): + if self is other: + return True + elif isinstance(other, str_type): + return self.matches(other, parse_all=True) + elif isinstance(other, ParserElement): + return vars(self) == vars(other) + return False + + def __hash__(self): + return id(self) + + def matches( + self, test_string: str, parse_all: bool = True, *, parseAll: bool = True + ) -> bool: + """ + Method for quick testing of a parser against a test string. Good for simple + inline microtests of sub expressions while building up larger parser. + + Parameters: + - ``test_string`` - to test against this expression for a match + - ``parse_all`` - (default= ``True``) - flag to pass to :class:`parse_string` when running tests + + Example:: + + expr = Word(nums) + assert expr.matches("100") + """ + parseAll = parseAll and parse_all + try: + self.parse_string(str(test_string), parse_all=parseAll) + return True + except ParseBaseException: + return False + + def run_tests( + self, + tests: Union[str, List[str]], + parse_all: bool = True, + comment: OptionalType[Union["ParserElement", str]] = "#", + full_dump: bool = True, + print_results: bool = True, + failure_tests: bool = False, + post_parse: Callable[[str, ParseResults], str] = None, + file: OptionalType[TextIO] = None, + with_line_numbers: bool = False, + *, + parseAll: bool = True, + fullDump: bool = True, + printResults: bool = True, + failureTests: bool = False, + postParse: Callable[[str, ParseResults], str] = None, + ) -> Tuple[bool, List[Tuple[str, Union[ParseResults, Exception]]]]: + """ + Execute the parse expression on a series of test strings, showing each + test, the parsed results or where the parse failed. Quick and easy way to + run a parse expression against a list of sample strings. + + Parameters: + - ``tests`` - a list of separate test strings, or a multiline string of test strings + - ``parse_all`` - (default= ``True``) - flag to pass to :class:`parse_string` when running tests + - ``comment`` - (default= ``'#'``) - expression for indicating embedded comments in the test + string; pass None to disable comment filtering + - ``full_dump`` - (default= ``True``) - dump results as list followed by results names in nested outline; + if False, only dump nested list + - ``print_results`` - (default= ``True``) prints test output to stdout + - ``failure_tests`` - (default= ``False``) indicates if these tests are expected to fail parsing + - ``post_parse`` - (default= ``None``) optional callback for successful parse results; called as + `fn(test_string, parse_results)` and returns a string to be added to the test output + - ``file`` - (default= ``None``) optional file-like object to which test output will be written; + if None, will default to ``sys.stdout`` + - ``with_line_numbers`` - default= ``False``) show test strings with line and column numbers + + Returns: a (success, results) tuple, where success indicates that all tests succeeded + (or failed if ``failure_tests`` is True), and the results contain a list of lines of each + test's output + + Example:: + + number_expr = pyparsing_common.number.copy() + + result = number_expr.run_tests(''' + # unsigned integer + 100 + # negative integer + -100 + # float with scientific notation + 6.02e23 + # integer with scientific notation + 1e-12 + ''') + print("Success" if result[0] else "Failed!") + + result = number_expr.run_tests(''' + # stray character + 100Z + # missing leading digit before '.' + -.100 + # too many '.' + 3.14.159 + ''', failure_tests=True) + print("Success" if result[0] else "Failed!") + + prints:: + + # unsigned integer + 100 + [100] + + # negative integer + -100 + [-100] + + # float with scientific notation + 6.02e23 + [6.02e+23] + + # integer with scientific notation + 1e-12 + [1e-12] + + Success + + # stray character + 100Z + ^ + FAIL: Expected end of text (at char 3), (line:1, col:4) + + # missing leading digit before '.' + -.100 + ^ + FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1) + + # too many '.' + 3.14.159 + ^ + FAIL: Expected end of text (at char 4), (line:1, col:5) + + Success + + Each test string must be on a single line. If you want to test a string that spans multiple + lines, create a test like this:: + + expr.run_tests(r"this is a test\\n of strings that spans \\n 3 lines") + + (Note that this is a raw string literal, you must include the leading ``'r'``.) + """ + from .testing import pyparsing_test + + parseAll = parseAll and parse_all + fullDump = fullDump and full_dump + printResults = printResults and print_results + failureTests = failureTests or failure_tests + postParse = postParse or post_parse + if isinstance(tests, str_type): + line_strip = type(tests).strip + tests = [line_strip(test_line) for test_line in tests.rstrip().splitlines()] + if isinstance(comment, str_type): + comment = Literal(comment) + if file is None: + file = sys.stdout + print_ = file.write + + result: Union[ParseResults, Exception] + allResults = [] + comments = [] + success = True + NL = Literal(r"\n").add_parse_action(replace_with("\n")).ignore(quoted_string) + BOM = "\ufeff" + for t in tests: + if comment is not None and comment.matches(t, False) or comments and not t: + comments.append( + pyparsing_test.with_line_numbers(t) if with_line_numbers else t + ) + continue + if not t: + continue + out = [ + "\n" + "\n".join(comments) if comments else "", + pyparsing_test.with_line_numbers(t) if with_line_numbers else t, + ] + comments = [] + try: + # convert newline marks to actual newlines, and strip leading BOM if present + t = NL.transform_string(t.lstrip(BOM)) + result = self.parse_string(t, parse_all=parseAll) + except ParseBaseException as pe: + fatal = "(FATAL)" if isinstance(pe, ParseFatalException) else "" + out.append(pe.explain()) + out.append("FAIL: " + str(pe)) + if ParserElement.verbose_stacktrace: + out.extend(traceback.format_tb(pe.__traceback__)) + success = success and failureTests + result = pe + except Exception as exc: + out.append("FAIL-EXCEPTION: {}: {}".format(type(exc).__name__, exc)) + if ParserElement.verbose_stacktrace: + out.extend(traceback.format_tb(exc.__traceback__)) + success = success and failureTests + result = exc + else: + success = success and not failureTests + if postParse is not None: + try: + pp_value = postParse(t, result) + if pp_value is not None: + if isinstance(pp_value, ParseResults): + out.append(pp_value.dump()) + else: + out.append(str(pp_value)) + else: + out.append(result.dump()) + except Exception as e: + out.append(result.dump(full=fullDump)) + out.append( + "{} failed: {}: {}".format( + postParse.__name__, type(e).__name__, e + ) + ) + else: + out.append(result.dump(full=fullDump)) + out.append("") + + if printResults: + print_("\n".join(out)) + + allResults.append((t, result)) + + return success, allResults + + def create_diagram( + self, + output_html: Union[TextIO, Path, str], + vertical: int = 3, + show_results_names: bool = False, + show_groups: bool = False, + **kwargs, + ) -> None: + """ + Create a railroad diagram for the parser. + + Parameters: + - output_html (str or file-like object) - output target for generated + diagram HTML + - vertical (int) - threshold for formatting multiple alternatives vertically + instead of horizontally (default=3) + - show_results_names - bool flag whether diagram should show annotations for + defined results names + - show_groups - bool flag whether groups should be highlighted with an unlabeled surrounding box + Additional diagram-formatting keyword arguments can also be included; + see railroad.Diagram class. + """ + + try: + from .diagram import to_railroad, railroad_to_html + except ImportError as ie: + raise Exception( + "must ``pip install pyparsing[diagrams]`` to generate parser railroad diagrams" + ) from ie + + self.streamline() + + railroad = to_railroad( + self, + vertical=vertical, + show_results_names=show_results_names, + show_groups=show_groups, + diagram_kwargs=kwargs, + ) + if isinstance(output_html, (str, Path)): + with open(output_html, "w", encoding="utf-8") as diag_file: + diag_file.write(railroad_to_html(railroad)) + else: + # we were passed a file-like object, just write to it + output_html.write(railroad_to_html(railroad)) + + setDefaultWhitespaceChars = set_default_whitespace_chars + inlineLiteralsUsing = inline_literals_using + setResultsName = set_results_name + setBreak = set_break + setParseAction = set_parse_action + addParseAction = add_parse_action + addCondition = add_condition + setFailAction = set_fail_action + tryParse = try_parse + canParseNext = can_parse_next + resetCache = reset_cache + enableLeftRecursion = enable_left_recursion + enablePackrat = enable_packrat + parseString = parse_string + scanString = scan_string + searchString = search_string + transformString = transform_string + setWhitespaceChars = set_whitespace_chars + parseWithTabs = parse_with_tabs + setDebugActions = set_debug_actions + setDebug = set_debug + defaultName = default_name + setName = set_name + parseFile = parse_file + runTests = run_tests + ignoreWhitespace = ignore_whitespace + leaveWhitespace = leave_whitespace + + +class _PendingSkip(ParserElement): + # internal placeholder class to hold a place were '...' is added to a parser element, + # once another ParserElement is added, this placeholder will be replaced with a SkipTo + def __init__(self, expr: ParserElement, must_skip: bool = False): + super().__init__() + self.anchor = expr + self.must_skip = must_skip + + def _generateDefaultName(self): + return str(self.anchor + Empty()).replace("Empty", "...") + + def __add__(self, other) -> "ParserElement": + skipper = SkipTo(other).set_name("...")("_skipped*") + if self.must_skip: + + def must_skip(t): + if not t._skipped or t._skipped.as_list() == [""]: + del t[0] + t.pop("_skipped", None) + + def show_skip(t): + if t._skipped.as_list()[-1:] == [""]: + t.pop("_skipped") + t["_skipped"] = "missing <" + repr(self.anchor) + ">" + + return ( + self.anchor + skipper().add_parse_action(must_skip) + | skipper().add_parse_action(show_skip) + ) + other + + return self.anchor + skipper + other + + def __repr__(self): + return self.defaultName + + def parseImpl(self, *args): + raise Exception( + "use of `...` expression without following SkipTo target expression" + ) + + +class Token(ParserElement): + """Abstract :class:`ParserElement` subclass, for defining atomic + matching patterns. + """ + + def __init__(self): + super().__init__(savelist=False) + + def _generateDefaultName(self): + return type(self).__name__ + + +class Empty(Token): + """ + An empty token, will always match. + """ + + def __init__(self): + super().__init__() + self.mayReturnEmpty = True + self.mayIndexError = False + + +class NoMatch(Token): + """ + A token that will never match. + """ + + def __init__(self): + super().__init__() + self.mayReturnEmpty = True + self.mayIndexError = False + self.errmsg = "Unmatchable token" + + def parseImpl(self, instring, loc, doActions=True): + raise ParseException(instring, loc, self.errmsg, self) + + +class Literal(Token): + """ + Token to exactly match a specified string. + + Example:: + + Literal('blah').parse_string('blah') # -> ['blah'] + Literal('blah').parse_string('blahfooblah') # -> ['blah'] + Literal('blah').parse_string('bla') # -> Exception: Expected "blah" + + For case-insensitive matching, use :class:`CaselessLiteral`. + + For keyword matching (force word break before and after the matched string), + use :class:`Keyword` or :class:`CaselessKeyword`. + """ + + def __init__(self, match_string: str = "", *, matchString: str = ""): + super().__init__() + match_string = matchString or match_string + self.match = match_string + self.matchLen = len(match_string) + try: + self.firstMatchChar = match_string[0] + except IndexError: + raise ValueError("null string passed to Literal; use Empty() instead") + self.errmsg = "Expected " + self.name + self.mayReturnEmpty = False + self.mayIndexError = False + + # Performance tuning: modify __class__ to select + # a parseImpl optimized for single-character check + if self.matchLen == 1 and type(self) is Literal: + self.__class__ = _SingleCharLiteral + + def _generateDefaultName(self): + return repr(self.match) + + def parseImpl(self, instring, loc, doActions=True): + if instring[loc] == self.firstMatchChar and instring.startswith( + self.match, loc + ): + return loc + self.matchLen, self.match + raise ParseException(instring, loc, self.errmsg, self) + + +class _SingleCharLiteral(Literal): + def parseImpl(self, instring, loc, doActions=True): + if instring[loc] == self.firstMatchChar: + return loc + 1, self.match + raise ParseException(instring, loc, self.errmsg, self) + + +ParserElement._literalStringClass = Literal + + +class Keyword(Token): + """ + Token to exactly match a specified string as a keyword, that is, + it must be immediately followed by a non-keyword character. Compare + with :class:`Literal`: + + - ``Literal("if")`` will match the leading ``'if'`` in + ``'ifAndOnlyIf'``. + - ``Keyword("if")`` will not; it will only match the leading + ``'if'`` in ``'if x=1'``, or ``'if(y==2)'`` + + Accepts two optional constructor arguments in addition to the + keyword string: + + - ``identChars`` is a string of characters that would be valid + identifier characters, defaulting to all alphanumerics + "_" and + "$" + - ``caseless`` allows case-insensitive matching, default is ``False``. + + Example:: + + Keyword("start").parse_string("start") # -> ['start'] + Keyword("start").parse_string("starting") # -> Exception + + For case-insensitive matching, use :class:`CaselessKeyword`. + """ + + DEFAULT_KEYWORD_CHARS = alphanums + "_$" + + def __init__( + self, + match_string: str = "", + ident_chars: OptionalType[str] = None, + caseless: bool = False, + *, + matchString: str = "", + identChars: OptionalType[str] = None, + ): + super().__init__() + identChars = identChars or ident_chars + if identChars is None: + identChars = Keyword.DEFAULT_KEYWORD_CHARS + match_string = matchString or match_string + self.match = match_string + self.matchLen = len(match_string) + try: + self.firstMatchChar = match_string[0] + except IndexError: + raise ValueError("null string passed to Keyword; use Empty() instead") + self.errmsg = "Expected {} {}".format(type(self).__name__, self.name) + self.mayReturnEmpty = False + self.mayIndexError = False + self.caseless = caseless + if caseless: + self.caselessmatch = match_string.upper() + identChars = identChars.upper() + self.identChars = set(identChars) + + def _generateDefaultName(self): + return repr(self.match) + + def parseImpl(self, instring, loc, doActions=True): + errmsg = self.errmsg + errloc = loc + if self.caseless: + if instring[loc : loc + self.matchLen].upper() == self.caselessmatch: + if loc == 0 or instring[loc - 1].upper() not in self.identChars: + if ( + loc >= len(instring) - self.matchLen + or instring[loc + self.matchLen].upper() not in self.identChars + ): + return loc + self.matchLen, self.match + else: + # followed by keyword char + errmsg += ", was immediately followed by keyword character" + errloc = loc + self.matchLen + else: + # preceded by keyword char + errmsg += ", keyword was immediately preceded by keyword character" + errloc = loc - 1 + # else no match just raise plain exception + + else: + if ( + instring[loc] == self.firstMatchChar + and self.matchLen == 1 + or instring.startswith(self.match, loc) + ): + if loc == 0 or instring[loc - 1] not in self.identChars: + if ( + loc >= len(instring) - self.matchLen + or instring[loc + self.matchLen] not in self.identChars + ): + return loc + self.matchLen, self.match + else: + # followed by keyword char + errmsg += ( + ", keyword was immediately followed by keyword character" + ) + errloc = loc + self.matchLen + else: + # preceded by keyword char + errmsg += ", keyword was immediately preceded by keyword character" + errloc = loc - 1 + # else no match just raise plain exception + + raise ParseException(instring, errloc, errmsg, self) + + @staticmethod + def set_default_keyword_chars(chars) -> None: + """ + Overrides the default characters used by :class:`Keyword` expressions. + """ + Keyword.DEFAULT_KEYWORD_CHARS = chars + + setDefaultKeywordChars = set_default_keyword_chars + + +class CaselessLiteral(Literal): + """ + Token to match a specified string, ignoring case of letters. + Note: the matched results will always be in the case of the given + match string, NOT the case of the input text. + + Example:: + + OneOrMore(CaselessLiteral("CMD")).parse_string("cmd CMD Cmd10") + # -> ['CMD', 'CMD', 'CMD'] + + (Contrast with example for :class:`CaselessKeyword`.) + """ + + def __init__(self, match_string: str = "", *, matchString: str = ""): + match_string = matchString or match_string + super().__init__(match_string.upper()) + # Preserve the defining literal. + self.returnString = match_string + self.errmsg = "Expected " + self.name + + def parseImpl(self, instring, loc, doActions=True): + if instring[loc : loc + self.matchLen].upper() == self.match: + return loc + self.matchLen, self.returnString + raise ParseException(instring, loc, self.errmsg, self) + + +class CaselessKeyword(Keyword): + """ + Caseless version of :class:`Keyword`. + + Example:: + + OneOrMore(CaselessKeyword("CMD")).parse_string("cmd CMD Cmd10") + # -> ['CMD', 'CMD'] + + (Contrast with example for :class:`CaselessLiteral`.) + """ + + def __init__( + self, + match_string: str = "", + ident_chars: OptionalType[str] = None, + *, + matchString: str = "", + identChars: OptionalType[str] = None, + ): + identChars = identChars or ident_chars + match_string = matchString or match_string + super().__init__(match_string, identChars, caseless=True) + + +class CloseMatch(Token): + """A variation on :class:`Literal` which matches "close" matches, + that is, strings with at most 'n' mismatching characters. + :class:`CloseMatch` takes parameters: + + - ``match_string`` - string to be matched + - ``caseless`` - a boolean indicating whether to ignore casing when comparing characters + - ``max_mismatches`` - (``default=1``) maximum number of + mismatches allowed to count as a match + + The results from a successful parse will contain the matched text + from the input string and the following named results: + + - ``mismatches`` - a list of the positions within the + match_string where mismatches were found + - ``original`` - the original match_string used to compare + against the input string + + If ``mismatches`` is an empty list, then the match was an exact + match. + + Example:: + + patt = CloseMatch("ATCATCGAATGGA") + patt.parse_string("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']}) + patt.parse_string("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1) + + # exact match + patt.parse_string("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']}) + + # close match allowing up to 2 mismatches + patt = CloseMatch("ATCATCGAATGGA", max_mismatches=2) + patt.parse_string("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']}) + """ + + def __init__( + self, + match_string: str, + max_mismatches: int = None, + *, + maxMismatches: int = 1, + caseless=False, + ): + maxMismatches = max_mismatches if max_mismatches is not None else maxMismatches + super().__init__() + self.match_string = match_string + self.maxMismatches = maxMismatches + self.errmsg = "Expected {!r} (with up to {} mismatches)".format( + self.match_string, self.maxMismatches + ) + self.caseless = caseless + self.mayIndexError = False + self.mayReturnEmpty = False + + def _generateDefaultName(self): + return "{}:{!r}".format(type(self).__name__, self.match_string) + + def parseImpl(self, instring, loc, doActions=True): + start = loc + instrlen = len(instring) + maxloc = start + len(self.match_string) + + if maxloc <= instrlen: + match_string = self.match_string + match_stringloc = 0 + mismatches = [] + maxMismatches = self.maxMismatches + + for match_stringloc, s_m in enumerate( + zip(instring[loc:maxloc], match_string) + ): + src, mat = s_m + if self.caseless: + src, mat = src.lower(), mat.lower() + + if src != mat: + mismatches.append(match_stringloc) + if len(mismatches) > maxMismatches: + break + else: + loc = start + match_stringloc + 1 + results = ParseResults([instring[start:loc]]) + results["original"] = match_string + results["mismatches"] = mismatches + return loc, results + + raise ParseException(instring, loc, self.errmsg, self) + + +class Word(Token): + """Token for matching words composed of allowed character sets. + Parameters: + - ``init_chars`` - string of all characters that should be used to + match as a word; "ABC" will match "AAA", "ABAB", "CBAC", etc.; + if ``body_chars`` is also specified, then this is the string of + initial characters + - ``body_chars`` - string of characters that + can be used for matching after a matched initial character as + given in ``init_chars``; if omitted, same as the initial characters + (default=``None``) + - ``min`` - minimum number of characters to match (default=1) + - ``max`` - maximum number of characters to match (default=0) + - ``exact`` - exact number of characters to match (default=0) + - ``as_keyword`` - match as a keyword (default=``False``) + - ``exclude_chars`` - characters that might be + found in the input ``body_chars`` string but which should not be + accepted for matching ;useful to define a word of all + printables except for one or two characters, for instance + (default=``None``) + + :class:`srange` is useful for defining custom character set strings + for defining :class:`Word` expressions, using range notation from + regular expression character sets. + + A common mistake is to use :class:`Word` to match a specific literal + string, as in ``Word("Address")``. Remember that :class:`Word` + uses the string argument to define *sets* of matchable characters. + This expression would match "Add", "AAA", "dAred", or any other word + made up of the characters 'A', 'd', 'r', 'e', and 's'. To match an + exact literal string, use :class:`Literal` or :class:`Keyword`. + + pyparsing includes helper strings for building Words: + + - :class:`alphas` + - :class:`nums` + - :class:`alphanums` + - :class:`hexnums` + - :class:`alphas8bit` (alphabetic characters in ASCII range 128-255 + - accented, tilded, umlauted, etc.) + - :class:`punc8bit` (non-alphabetic characters in ASCII range + 128-255 - currency, symbols, superscripts, diacriticals, etc.) + - :class:`printables` (any non-whitespace character) + + ``alphas``, ``nums``, and ``printables`` are also defined in several + Unicode sets - see :class:`pyparsing_unicode``. + + Example:: + + # a word composed of digits + integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9")) + + # a word with a leading capital, and zero or more lowercase + capital_word = Word(alphas.upper(), alphas.lower()) + + # hostnames are alphanumeric, with leading alpha, and '-' + hostname = Word(alphas, alphanums + '-') + + # roman numeral (not a strict parser, accepts invalid mix of characters) + roman = Word("IVXLCDM") + + # any string of non-whitespace characters, except for ',' + csv_value = Word(printables, exclude_chars=",") + """ + + def __init__( + self, + init_chars: str = "", + body_chars: OptionalType[str] = None, + min: int = 1, + max: int = 0, + exact: int = 0, + as_keyword: bool = False, + exclude_chars: OptionalType[str] = None, + *, + initChars: OptionalType[str] = None, + bodyChars: OptionalType[str] = None, + asKeyword: bool = False, + excludeChars: OptionalType[str] = None, + ): + initChars = initChars or init_chars + bodyChars = bodyChars or body_chars + asKeyword = asKeyword or as_keyword + excludeChars = excludeChars or exclude_chars + super().__init__() + if not initChars: + raise ValueError( + "invalid {}, initChars cannot be empty string".format( + type(self).__name__ + ) + ) + + initChars = set(initChars) + self.initChars = initChars + if excludeChars: + excludeChars = set(excludeChars) + initChars -= excludeChars + if bodyChars: + bodyChars = set(bodyChars) - excludeChars + self.initCharsOrig = "".join(sorted(initChars)) + + if bodyChars: + self.bodyCharsOrig = "".join(sorted(bodyChars)) + self.bodyChars = set(bodyChars) + else: + self.bodyCharsOrig = "".join(sorted(initChars)) + self.bodyChars = set(initChars) + + self.maxSpecified = max > 0 + + if min < 1: + raise ValueError( + "cannot specify a minimum length < 1; use Opt(Word()) if zero-length word is permitted" + ) + + self.minLen = min + + if max > 0: + self.maxLen = max + else: + self.maxLen = _MAX_INT + + if exact > 0: + self.maxLen = exact + self.minLen = exact + + self.errmsg = "Expected " + self.name + self.mayIndexError = False + self.asKeyword = asKeyword + + # see if we can make a regex for this Word + if " " not in self.initChars | self.bodyChars and (min == 1 and exact == 0): + if self.bodyChars == self.initChars: + if max == 0: + repeat = "+" + elif max == 1: + repeat = "" + else: + repeat = "{{{},{}}}".format( + self.minLen, "" if self.maxLen == _MAX_INT else self.maxLen + ) + self.reString = "[{}]{}".format( + _collapse_string_to_ranges(self.initChars), + repeat, + ) + elif len(self.initChars) == 1: + if max == 0: + repeat = "*" + else: + repeat = "{{0,{}}}".format(max - 1) + self.reString = "{}[{}]{}".format( + re.escape(self.initCharsOrig), + _collapse_string_to_ranges(self.bodyChars), + repeat, + ) + else: + if max == 0: + repeat = "*" + elif max == 2: + repeat = "" + else: + repeat = "{{0,{}}}".format(max - 1) + self.reString = "[{}][{}]{}".format( + _collapse_string_to_ranges(self.initChars), + _collapse_string_to_ranges(self.bodyChars), + repeat, + ) + if self.asKeyword: + self.reString = r"\b" + self.reString + r"\b" + + try: + self.re = re.compile(self.reString) + except re.error: + self.re = None + else: + self.re_match = self.re.match + self.__class__ = _WordRegex + + def _generateDefaultName(self): + def charsAsStr(s): + max_repr_len = 16 + s = _collapse_string_to_ranges(s, re_escape=False) + if len(s) > max_repr_len: + return s[: max_repr_len - 3] + "..." + else: + return s + + if self.initChars != self.bodyChars: + base = "W:({}, {})".format( + charsAsStr(self.initChars), charsAsStr(self.bodyChars) + ) + else: + base = "W:({})".format(charsAsStr(self.initChars)) + + # add length specification + if self.minLen > 1 or self.maxLen != _MAX_INT: + if self.minLen == self.maxLen: + if self.minLen == 1: + return base[2:] + else: + return base + "{{{}}}".format(self.minLen) + elif self.maxLen == _MAX_INT: + return base + "{{{},...}}".format(self.minLen) + else: + return base + "{{{},{}}}".format(self.minLen, self.maxLen) + return base + + def parseImpl(self, instring, loc, doActions=True): + if instring[loc] not in self.initChars: + raise ParseException(instring, loc, self.errmsg, self) + + start = loc + loc += 1 + instrlen = len(instring) + bodychars = self.bodyChars + maxloc = start + self.maxLen + maxloc = min(maxloc, instrlen) + while loc < maxloc and instring[loc] in bodychars: + loc += 1 + + throwException = False + if loc - start < self.minLen: + throwException = True + elif self.maxSpecified and loc < instrlen and instring[loc] in bodychars: + throwException = True + elif self.asKeyword: + if ( + start > 0 + and instring[start - 1] in bodychars + or loc < instrlen + and instring[loc] in bodychars + ): + throwException = True + + if throwException: + raise ParseException(instring, loc, self.errmsg, self) + + return loc, instring[start:loc] + + +class _WordRegex(Word): + def parseImpl(self, instring, loc, doActions=True): + result = self.re_match(instring, loc) + if not result: + raise ParseException(instring, loc, self.errmsg, self) + + loc = result.end() + return loc, result.group() + + +class Char(_WordRegex): + """A short-cut class for defining :class:`Word` ``(characters, exact=1)``, + when defining a match of any single character in a string of + characters. + """ + + def __init__( + self, + charset: str, + as_keyword: bool = False, + exclude_chars: OptionalType[str] = None, + *, + asKeyword: bool = False, + excludeChars: OptionalType[str] = None, + ): + asKeyword = asKeyword or as_keyword + excludeChars = excludeChars or exclude_chars + super().__init__( + charset, exact=1, asKeyword=asKeyword, excludeChars=excludeChars + ) + self.reString = "[{}]".format(_collapse_string_to_ranges(self.initChars)) + if asKeyword: + self.reString = r"\b{}\b".format(self.reString) + self.re = re.compile(self.reString) + self.re_match = self.re.match + + +class Regex(Token): + r"""Token for matching strings that match a given regular + expression. Defined with string specifying the regular expression in + a form recognized by the stdlib Python `re module `_. + If the given regex contains named groups (defined using ``(?P...)``), + these will be preserved as named :class:`ParseResults`. + + If instead of the Python stdlib ``re`` module you wish to use a different RE module + (such as the ``regex`` module), you can do so by building your ``Regex`` object with + a compiled RE that was compiled using ``regex``. + + Example:: + + realnum = Regex(r"[+-]?\d+\.\d*") + # ref: https://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression + roman = Regex(r"M{0,4}(CM|CD|D?{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})") + + # named fields in a regex will be returned as named results + date = Regex(r'(?P\d{4})-(?P\d\d?)-(?P\d\d?)') + + # the Regex class will accept re's compiled using the regex module + import regex + parser = pp.Regex(regex.compile(r'[0-9]')) + """ + + def __init__( + self, + pattern: Any, + flags: Union[re.RegexFlag, int] = 0, + as_group_list: bool = False, + as_match: bool = False, + *, + asGroupList: bool = False, + asMatch: bool = False, + ): + """The parameters ``pattern`` and ``flags`` are passed + to the ``re.compile()`` function as-is. See the Python + `re module `_ module for an + explanation of the acceptable patterns and flags. + """ + super().__init__() + asGroupList = asGroupList or as_group_list + asMatch = asMatch or as_match + + if isinstance(pattern, str_type): + if not pattern: + raise ValueError("null string passed to Regex; use Empty() instead") + + self._re = None + self.reString = self.pattern = pattern + self.flags = flags + + elif hasattr(pattern, "pattern") and hasattr(pattern, "match"): + self._re = pattern + self.pattern = self.reString = pattern.pattern + self.flags = flags + + else: + raise TypeError( + "Regex may only be constructed with a string or a compiled RE object" + ) + + self.errmsg = "Expected " + self.name + self.mayIndexError = False + self.asGroupList = asGroupList + self.asMatch = asMatch + if self.asGroupList: + self.parseImpl = self.parseImplAsGroupList + if self.asMatch: + self.parseImpl = self.parseImplAsMatch + + @cached_property + def re(self): + if self._re: + return self._re + else: + try: + return re.compile(self.pattern, self.flags) + except re.error: + raise ValueError( + "invalid pattern ({!r}) passed to Regex".format(self.pattern) + ) + + @cached_property + def re_match(self): + return self.re.match + + @cached_property + def mayReturnEmpty(self): + return self.re_match("") is not None + + def _generateDefaultName(self): + return "Re:({})".format(repr(self.pattern).replace("\\\\", "\\")) + + def parseImpl(self, instring, loc, doActions=True): + result = self.re_match(instring, loc) + if not result: + raise ParseException(instring, loc, self.errmsg, self) + + loc = result.end() + ret = ParseResults(result.group()) + d = result.groupdict() + if d: + for k, v in d.items(): + ret[k] = v + return loc, ret + + def parseImplAsGroupList(self, instring, loc, doActions=True): + result = self.re_match(instring, loc) + if not result: + raise ParseException(instring, loc, self.errmsg, self) + + loc = result.end() + ret = result.groups() + return loc, ret + + def parseImplAsMatch(self, instring, loc, doActions=True): + result = self.re_match(instring, loc) + if not result: + raise ParseException(instring, loc, self.errmsg, self) + + loc = result.end() + ret = result + return loc, ret + + def sub(self, repl: str) -> ParserElement: + r""" + Return :class:`Regex` with an attached parse action to transform the parsed + result as if called using `re.sub(expr, repl, string) `_. + + Example:: + + make_html = Regex(r"(\w+):(.*?):").sub(r"<\1>\2") + print(make_html.transform_string("h1:main title:")) + # prints "

main title

" + """ + if self.asGroupList: + raise TypeError("cannot use sub() with Regex(asGroupList=True)") + + if self.asMatch and callable(repl): + raise TypeError("cannot use sub() with a callable with Regex(asMatch=True)") + + if self.asMatch: + + def pa(tokens): + return tokens[0].expand(repl) + + else: + + def pa(tokens): + return self.re.sub(repl, tokens[0]) + + return self.add_parse_action(pa) + + +class QuotedString(Token): + r""" + Token for matching strings that are delimited by quoting characters. + + Defined with the following parameters: + + - ``quote_char`` - string of one or more characters defining the + quote delimiting string + - ``esc_char`` - character to re_escape quotes, typically backslash + (default= ``None``) + - ``esc_quote`` - special quote sequence to re_escape an embedded quote + string (such as SQL's ``""`` to re_escape an embedded ``"``) + (default= ``None``) + - ``multiline`` - boolean indicating whether quotes can span + multiple lines (default= ``False``) + - ``unquote_results`` - boolean indicating whether the matched text + should be unquoted (default= ``True``) + - ``end_quote_char`` - string of one or more characters defining the + end of the quote delimited string (default= ``None`` => same as + quote_char) + - ``convert_whitespace_escapes`` - convert escaped whitespace + (``'\t'``, ``'\n'``, etc.) to actual whitespace + (default= ``True``) + + Example:: + + qs = QuotedString('"') + print(qs.search_string('lsjdf "This is the quote" sldjf')) + complex_qs = QuotedString('{{', end_quote_char='}}') + print(complex_qs.search_string('lsjdf {{This is the "quote"}} sldjf')) + sql_qs = QuotedString('"', esc_quote='""') + print(sql_qs.search_string('lsjdf "This is the quote with ""embedded"" quotes" sldjf')) + + prints:: + + [['This is the quote']] + [['This is the "quote"']] + [['This is the quote with "embedded" quotes']] + """ + ws_map = ((r"\t", "\t"), (r"\n", "\n"), (r"\f", "\f"), (r"\r", "\r")) + + def __init__( + self, + quote_char: str = "", + esc_char: OptionalType[str] = None, + esc_quote: OptionalType[str] = None, + multiline: bool = False, + unquote_results: bool = True, + end_quote_char: OptionalType[str] = None, + convert_whitespace_escapes: bool = True, + *, + quoteChar: str = "", + escChar: OptionalType[str] = None, + escQuote: OptionalType[str] = None, + unquoteResults: bool = True, + endQuoteChar: OptionalType[str] = None, + convertWhitespaceEscapes: bool = True, + ): + super().__init__() + escChar = escChar or esc_char + escQuote = escQuote or esc_quote + unquoteResults = unquoteResults and unquote_results + endQuoteChar = endQuoteChar or end_quote_char + convertWhitespaceEscapes = ( + convertWhitespaceEscapes and convert_whitespace_escapes + ) + quote_char = quoteChar or quote_char + + # remove white space from quote chars - wont work anyway + quote_char = quote_char.strip() + if not quote_char: + raise ValueError("quote_char cannot be the empty string") + + if endQuoteChar is None: + endQuoteChar = quote_char + else: + endQuoteChar = endQuoteChar.strip() + if not endQuoteChar: + raise ValueError("endQuoteChar cannot be the empty string") + + self.quoteChar = quote_char + self.quoteCharLen = len(quote_char) + self.firstQuoteChar = quote_char[0] + self.endQuoteChar = endQuoteChar + self.endQuoteCharLen = len(endQuoteChar) + self.escChar = escChar + self.escQuote = escQuote + self.unquoteResults = unquoteResults + self.convertWhitespaceEscapes = convertWhitespaceEscapes + + sep = "" + inner_pattern = "" + + if escQuote: + inner_pattern += r"{}(?:{})".format(sep, re.escape(escQuote)) + sep = "|" + + if escChar: + inner_pattern += r"{}(?:{}.)".format(sep, re.escape(escChar)) + sep = "|" + self.escCharReplacePattern = re.escape(self.escChar) + "(.)" + + if len(self.endQuoteChar) > 1: + inner_pattern += ( + "{}(?:".format(sep) + + "|".join( + "(?:{}(?!{}))".format( + re.escape(self.endQuoteChar[:i]), + re.escape(self.endQuoteChar[i:]), + ) + for i in range(len(self.endQuoteChar) - 1, 0, -1) + ) + + ")" + ) + sep = "|" + + if multiline: + self.flags = re.MULTILINE | re.DOTALL + inner_pattern += r"{}(?:[^{}{}])".format( + sep, + _escape_regex_range_chars(self.endQuoteChar[0]), + (_escape_regex_range_chars(escChar) if escChar is not None else ""), + ) + else: + self.flags = 0 + inner_pattern += r"{}(?:[^{}\n\r{}])".format( + sep, + _escape_regex_range_chars(self.endQuoteChar[0]), + (_escape_regex_range_chars(escChar) if escChar is not None else ""), + ) + + self.pattern = "".join( + [ + re.escape(self.quoteChar), + "(?:", + inner_pattern, + ")*", + re.escape(self.endQuoteChar), + ] + ) + + try: + self.re = re.compile(self.pattern, self.flags) + self.reString = self.pattern + self.re_match = self.re.match + except re.error: + raise ValueError( + "invalid pattern {!r} passed to Regex".format(self.pattern) + ) + + self.errmsg = "Expected " + self.name + self.mayIndexError = False + self.mayReturnEmpty = True + + def _generateDefaultName(self): + if self.quoteChar == self.endQuoteChar and isinstance(self.quoteChar, str_type): + return "string enclosed in {!r}".format(self.quoteChar) + + return "quoted string, starting with {} ending with {}".format( + self.quoteChar, self.endQuoteChar + ) + + def parseImpl(self, instring, loc, doActions=True): + result = ( + instring[loc] == self.firstQuoteChar + and self.re_match(instring, loc) + or None + ) + if not result: + raise ParseException(instring, loc, self.errmsg, self) + + loc = result.end() + ret = result.group() + + if self.unquoteResults: + + # strip off quotes + ret = ret[self.quoteCharLen : -self.endQuoteCharLen] + + if isinstance(ret, str_type): + # replace escaped whitespace + if "\\" in ret and self.convertWhitespaceEscapes: + for wslit, wschar in self.ws_map: + ret = ret.replace(wslit, wschar) + + # replace escaped characters + if self.escChar: + ret = re.sub(self.escCharReplacePattern, r"\g<1>", ret) + + # replace escaped quotes + if self.escQuote: + ret = ret.replace(self.escQuote, self.endQuoteChar) + + return loc, ret + + +class CharsNotIn(Token): + """Token for matching words composed of characters *not* in a given + set (will include whitespace in matched characters if not listed in + the provided exclusion set - see example). Defined with string + containing all disallowed characters, and an optional minimum, + maximum, and/or exact length. The default value for ``min`` is + 1 (a minimum value < 1 is not valid); the default values for + ``max`` and ``exact`` are 0, meaning no maximum or exact + length restriction. + + Example:: + + # define a comma-separated-value as anything that is not a ',' + csv_value = CharsNotIn(',') + print(delimited_list(csv_value).parse_string("dkls,lsdkjf,s12 34,@!#,213")) + + prints:: + + ['dkls', 'lsdkjf', 's12 34', '@!#', '213'] + """ + + def __init__( + self, + not_chars: str = "", + min: int = 1, + max: int = 0, + exact: int = 0, + *, + notChars: str = "", + ): + super().__init__() + self.skipWhitespace = False + self.notChars = not_chars or notChars + self.notCharsSet = set(self.notChars) + + if min < 1: + raise ValueError( + "cannot specify a minimum length < 1; use " + "Opt(CharsNotIn()) if zero-length char group is permitted" + ) + + self.minLen = min + + if max > 0: + self.maxLen = max + else: + self.maxLen = _MAX_INT + + if exact > 0: + self.maxLen = exact + self.minLen = exact + + self.errmsg = "Expected " + self.name + self.mayReturnEmpty = self.minLen == 0 + self.mayIndexError = False + + def _generateDefaultName(self): + not_chars_str = _collapse_string_to_ranges(self.notChars) + if len(not_chars_str) > 16: + return "!W:({}...)".format(self.notChars[: 16 - 3]) + else: + return "!W:({})".format(self.notChars) + + def parseImpl(self, instring, loc, doActions=True): + notchars = self.notCharsSet + if instring[loc] in notchars: + raise ParseException(instring, loc, self.errmsg, self) + + start = loc + loc += 1 + maxlen = min(start + self.maxLen, len(instring)) + while loc < maxlen and instring[loc] not in notchars: + loc += 1 + + if loc - start < self.minLen: + raise ParseException(instring, loc, self.errmsg, self) + + return loc, instring[start:loc] + + +class White(Token): + """Special matching class for matching whitespace. Normally, + whitespace is ignored by pyparsing grammars. This class is included + when some whitespace structures are significant. Define with + a string containing the whitespace characters to be matched; default + is ``" \\t\\r\\n"``. Also takes optional ``min``, + ``max``, and ``exact`` arguments, as defined for the + :class:`Word` class. + """ + + whiteStrs = { + " ": "", + "\t": "", + "\n": "", + "\r": "", + "\f": "", + "\u00A0": "", + "\u1680": "", + "\u180E": "", + "\u2000": "", + "\u2001": "", + "\u2002": "", + "\u2003": "", + "\u2004": "", + "\u2005": "", + "\u2006": "", + "\u2007": "", + "\u2008": "", + "\u2009": "", + "\u200A": "", + "\u200B": "", + "\u202F": "", + "\u205F": "", + "\u3000": "", + } + + def __init__(self, ws: str = " \t\r\n", min: int = 1, max: int = 0, exact: int = 0): + super().__init__() + self.matchWhite = ws + self.set_whitespace_chars( + "".join(c for c in self.whiteStrs if c not in self.matchWhite), + copy_defaults=True, + ) + # self.leave_whitespace() + self.mayReturnEmpty = True + self.errmsg = "Expected " + self.name + + self.minLen = min + + if max > 0: + self.maxLen = max + else: + self.maxLen = _MAX_INT + + if exact > 0: + self.maxLen = exact + self.minLen = exact + + def _generateDefaultName(self): + return "".join(White.whiteStrs[c] for c in self.matchWhite) + + def parseImpl(self, instring, loc, doActions=True): + if instring[loc] not in self.matchWhite: + raise ParseException(instring, loc, self.errmsg, self) + start = loc + loc += 1 + maxloc = start + self.maxLen + maxloc = min(maxloc, len(instring)) + while loc < maxloc and instring[loc] in self.matchWhite: + loc += 1 + + if loc - start < self.minLen: + raise ParseException(instring, loc, self.errmsg, self) + + return loc, instring[start:loc] + + +class PositionToken(Token): + def __init__(self): + super().__init__() + self.mayReturnEmpty = True + self.mayIndexError = False + + +class GoToColumn(PositionToken): + """Token to advance to a specific column of input text; useful for + tabular report scraping. + """ + + def __init__(self, colno: int): + super().__init__() + self.col = colno + + def preParse(self, instring, loc): + if col(loc, instring) != self.col: + instrlen = len(instring) + if self.ignoreExprs: + loc = self._skipIgnorables(instring, loc) + while ( + loc < instrlen + and instring[loc].isspace() + and col(loc, instring) != self.col + ): + loc += 1 + return loc + + def parseImpl(self, instring, loc, doActions=True): + thiscol = col(loc, instring) + if thiscol > self.col: + raise ParseException(instring, loc, "Text not in expected column", self) + newloc = loc + self.col - thiscol + ret = instring[loc:newloc] + return newloc, ret + + +class LineStart(PositionToken): + r"""Matches if current position is at the beginning of a line within + the parse string + + Example:: + + test = '''\ + AAA this line + AAA and this line + AAA but not this one + B AAA and definitely not this one + ''' + + for t in (LineStart() + 'AAA' + restOfLine).search_string(test): + print(t) + + prints:: + + ['AAA', ' this line'] + ['AAA', ' and this line'] + + """ + + def __init__(self): + super().__init__() + self.leave_whitespace() + self.orig_whiteChars = set() | self.whiteChars + self.whiteChars.discard("\n") + self.skipper = Empty().set_whitespace_chars(self.whiteChars) + self.errmsg = "Expected start of line" + + def preParse(self, instring, loc): + if loc == 0: + return loc + else: + ret = self.skipper.preParse(instring, loc) + if "\n" in self.orig_whiteChars: + while instring[ret : ret + 1] == "\n": + ret = self.skipper.preParse(instring, ret + 1) + return ret + + def parseImpl(self, instring, loc, doActions=True): + if col(loc, instring) == 1: + return loc, [] + raise ParseException(instring, loc, self.errmsg, self) + + +class LineEnd(PositionToken): + """Matches if current position is at the end of a line within the + parse string + """ + + def __init__(self): + super().__init__() + self.whiteChars.discard("\n") + self.set_whitespace_chars(self.whiteChars, copy_defaults=False) + self.errmsg = "Expected end of line" + + def parseImpl(self, instring, loc, doActions=True): + if loc < len(instring): + if instring[loc] == "\n": + return loc + 1, "\n" + else: + raise ParseException(instring, loc, self.errmsg, self) + elif loc == len(instring): + return loc + 1, [] + else: + raise ParseException(instring, loc, self.errmsg, self) + + +class StringStart(PositionToken): + """Matches if current position is at the beginning of the parse + string + """ + + def __init__(self): + super().__init__() + self.errmsg = "Expected start of text" + + def parseImpl(self, instring, loc, doActions=True): + if loc != 0: + # see if entire string up to here is just whitespace and ignoreables + if loc != self.preParse(instring, 0): + raise ParseException(instring, loc, self.errmsg, self) + return loc, [] + + +class StringEnd(PositionToken): + """ + Matches if current position is at the end of the parse string + """ + + def __init__(self): + super().__init__() + self.errmsg = "Expected end of text" + + def parseImpl(self, instring, loc, doActions=True): + if loc < len(instring): + raise ParseException(instring, loc, self.errmsg, self) + elif loc == len(instring): + return loc + 1, [] + elif loc > len(instring): + return loc, [] + else: + raise ParseException(instring, loc, self.errmsg, self) + + +class WordStart(PositionToken): + """Matches if the current position is at the beginning of a + :class:`Word`, and is not preceded by any character in a given + set of ``word_chars`` (default= ``printables``). To emulate the + ``\b`` behavior of regular expressions, use + ``WordStart(alphanums)``. ``WordStart`` will also match at + the beginning of the string being parsed, or at the beginning of + a line. + """ + + def __init__(self, word_chars: str = printables, *, wordChars: str = printables): + wordChars = word_chars if wordChars == printables else wordChars + super().__init__() + self.wordChars = set(wordChars) + self.errmsg = "Not at the start of a word" + + def parseImpl(self, instring, loc, doActions=True): + if loc != 0: + if ( + instring[loc - 1] in self.wordChars + or instring[loc] not in self.wordChars + ): + raise ParseException(instring, loc, self.errmsg, self) + return loc, [] + + +class WordEnd(PositionToken): + """Matches if the current position is at the end of a :class:`Word`, + and is not followed by any character in a given set of ``word_chars`` + (default= ``printables``). To emulate the ``\b`` behavior of + regular expressions, use ``WordEnd(alphanums)``. ``WordEnd`` + will also match at the end of the string being parsed, or at the end + of a line. + """ + + def __init__(self, word_chars: str = printables, *, wordChars: str = printables): + wordChars = word_chars if wordChars == printables else wordChars + super().__init__() + self.wordChars = set(wordChars) + self.skipWhitespace = False + self.errmsg = "Not at the end of a word" + + def parseImpl(self, instring, loc, doActions=True): + instrlen = len(instring) + if instrlen > 0 and loc < instrlen: + if ( + instring[loc] in self.wordChars + or instring[loc - 1] not in self.wordChars + ): + raise ParseException(instring, loc, self.errmsg, self) + return loc, [] + + +class ParseExpression(ParserElement): + """Abstract subclass of ParserElement, for combining and + post-processing parsed tokens. + """ + + def __init__(self, exprs: IterableType[ParserElement], savelist: bool = False): + super().__init__(savelist) + self.exprs: List[ParserElement] + if isinstance(exprs, _generatorType): + exprs = list(exprs) + + if isinstance(exprs, str_type): + self.exprs = [self._literalStringClass(exprs)] + elif isinstance(exprs, ParserElement): + self.exprs = [exprs] + elif isinstance(exprs, Iterable): + exprs = list(exprs) + # if sequence of strings provided, wrap with Literal + if any(isinstance(expr, str_type) for expr in exprs): + exprs = ( + self._literalStringClass(e) if isinstance(e, str_type) else e + for e in exprs + ) + self.exprs = list(exprs) + else: + try: + self.exprs = list(exprs) + except TypeError: + self.exprs = [exprs] + self.callPreparse = False + + def recurse(self) -> Sequence[ParserElement]: + return self.exprs[:] + + def append(self, other) -> ParserElement: + self.exprs.append(other) + self._defaultName = None + return self + + def leave_whitespace(self, recursive: bool = True) -> ParserElement: + """ + Extends ``leave_whitespace`` defined in base class, and also invokes ``leave_whitespace`` on + all contained expressions. + """ + super().leave_whitespace(recursive) + + if recursive: + self.exprs = [e.copy() for e in self.exprs] + for e in self.exprs: + e.leave_whitespace(recursive) + return self + + def ignore_whitespace(self, recursive: bool = True) -> ParserElement: + """ + Extends ``ignore_whitespace`` defined in base class, and also invokes ``leave_whitespace`` on + all contained expressions. + """ + super().ignore_whitespace(recursive) + if recursive: + self.exprs = [e.copy() for e in self.exprs] + for e in self.exprs: + e.ignore_whitespace(recursive) + return self + + def ignore(self, other) -> ParserElement: + if isinstance(other, Suppress): + if other not in self.ignoreExprs: + super().ignore(other) + for e in self.exprs: + e.ignore(self.ignoreExprs[-1]) + else: + super().ignore(other) + for e in self.exprs: + e.ignore(self.ignoreExprs[-1]) + return self + + def _generateDefaultName(self): + return "{}:({})".format(self.__class__.__name__, str(self.exprs)) + + def streamline(self) -> ParserElement: + if self.streamlined: + return self + + super().streamline() + + for e in self.exprs: + e.streamline() + + # collapse nested :class:`And`'s of the form ``And(And(And(a, b), c), d)`` to ``And(a, b, c, d)`` + # but only if there are no parse actions or resultsNames on the nested And's + # (likewise for :class:`Or`'s and :class:`MatchFirst`'s) + if len(self.exprs) == 2: + other = self.exprs[0] + if ( + isinstance(other, self.__class__) + and not other.parseAction + and other.resultsName is None + and not other.debug + ): + self.exprs = other.exprs[:] + [self.exprs[1]] + self._defaultName = None + self.mayReturnEmpty |= other.mayReturnEmpty + self.mayIndexError |= other.mayIndexError + + other = self.exprs[-1] + if ( + isinstance(other, self.__class__) + and not other.parseAction + and other.resultsName is None + and not other.debug + ): + self.exprs = self.exprs[:-1] + other.exprs[:] + self._defaultName = None + self.mayReturnEmpty |= other.mayReturnEmpty + self.mayIndexError |= other.mayIndexError + + self.errmsg = "Expected " + str(self) + + return self + + def validate(self, validateTrace=None) -> None: + tmp = (validateTrace if validateTrace is not None else [])[:] + [self] + for e in self.exprs: + e.validate(tmp) + self._checkRecursion([]) + + def copy(self) -> ParserElement: + ret = super().copy() + ret.exprs = [e.copy() for e in self.exprs] + return ret + + def _setResultsName(self, name, listAllMatches=False): + if ( + __diag__.warn_ungrouped_named_tokens_in_collection + and Diagnostics.warn_ungrouped_named_tokens_in_collection + not in self.suppress_warnings_ + ): + for e in self.exprs: + if ( + isinstance(e, ParserElement) + and e.resultsName + and Diagnostics.warn_ungrouped_named_tokens_in_collection + not in e.suppress_warnings_ + ): + warnings.warn( + "{}: setting results name {!r} on {} expression " + "collides with {!r} on contained expression".format( + "warn_ungrouped_named_tokens_in_collection", + name, + type(self).__name__, + e.resultsName, + ), + stacklevel=3, + ) + + return super()._setResultsName(name, listAllMatches) + + ignoreWhitespace = ignore_whitespace + leaveWhitespace = leave_whitespace + + +class And(ParseExpression): + """ + Requires all given :class:`ParseExpression` s to be found in the given order. + Expressions may be separated by whitespace. + May be constructed using the ``'+'`` operator. + May also be constructed using the ``'-'`` operator, which will + suppress backtracking. + + Example:: + + integer = Word(nums) + name_expr = OneOrMore(Word(alphas)) + + expr = And([integer("id"), name_expr("name"), integer("age")]) + # more easily written as: + expr = integer("id") + name_expr("name") + integer("age") + """ + + class _ErrorStop(Empty): + def __init__(self, *args, **kwargs): + super().__init__(*args, **kwargs) + self.leave_whitespace() + + def _generateDefaultName(self): + return "-" + + def __init__(self, exprs_arg: IterableType[ParserElement], savelist: bool = True): + exprs: List[ParserElement] = list(exprs_arg) + if exprs and Ellipsis in exprs: + tmp = [] + for i, expr in enumerate(exprs): + if expr is Ellipsis: + if i < len(exprs) - 1: + skipto_arg: ParserElement = (Empty() + exprs[i + 1]).exprs[-1] + tmp.append(SkipTo(skipto_arg)("_skipped*")) + else: + raise Exception( + "cannot construct And with sequence ending in ..." + ) + else: + tmp.append(expr) + exprs[:] = tmp + super().__init__(exprs, savelist) + if self.exprs: + self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs) + if not isinstance(self.exprs[0], White): + self.set_whitespace_chars( + self.exprs[0].whiteChars, + copy_defaults=self.exprs[0].copyDefaultWhiteChars, + ) + self.skipWhitespace = self.exprs[0].skipWhitespace + else: + self.skipWhitespace = False + else: + self.mayReturnEmpty = True + self.callPreparse = True + + def streamline(self) -> ParserElement: + # collapse any _PendingSkip's + if self.exprs: + if any( + isinstance(e, ParseExpression) + and e.exprs + and isinstance(e.exprs[-1], _PendingSkip) + for e in self.exprs[:-1] + ): + for i, e in enumerate(self.exprs[:-1]): + if e is None: + continue + if ( + isinstance(e, ParseExpression) + and e.exprs + and isinstance(e.exprs[-1], _PendingSkip) + ): + e.exprs[-1] = e.exprs[-1] + self.exprs[i + 1] + self.exprs[i + 1] = None + self.exprs = [e for e in self.exprs if e is not None] + + super().streamline() + + # link any IndentedBlocks to the prior expression + for prev, cur in zip(self.exprs, self.exprs[1:]): + # traverse cur or any first embedded expr of cur looking for an IndentedBlock + # (but watch out for recursive grammar) + seen = set() + while cur: + if id(cur) in seen: + break + seen.add(id(cur)) + if isinstance(cur, IndentedBlock): + prev.add_parse_action( + lambda s, l, t, cur_=cur: setattr( + cur_, "parent_anchor", col(l, s) + ) + ) + break + subs = cur.recurse() + cur = next(iter(subs), None) + + self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs) + return self + + def parseImpl(self, instring, loc, doActions=True): + # pass False as callPreParse arg to _parse for first element, since we already + # pre-parsed the string as part of our And pre-parsing + loc, resultlist = self.exprs[0]._parse( + instring, loc, doActions, callPreParse=False + ) + errorStop = False + for e in self.exprs[1:]: + # if isinstance(e, And._ErrorStop): + if type(e) is And._ErrorStop: + errorStop = True + continue + if errorStop: + try: + loc, exprtokens = e._parse(instring, loc, doActions) + except ParseSyntaxException: + raise + except ParseBaseException as pe: + pe.__traceback__ = None + raise ParseSyntaxException._from_exception(pe) + except IndexError: + raise ParseSyntaxException( + instring, len(instring), self.errmsg, self + ) + else: + loc, exprtokens = e._parse(instring, loc, doActions) + if exprtokens or exprtokens.haskeys(): + resultlist += exprtokens + return loc, resultlist + + def __iadd__(self, other): + if isinstance(other, str_type): + other = self._literalStringClass(other) + return self.append(other) # And([self, other]) + + def _checkRecursion(self, parseElementList): + subRecCheckList = parseElementList[:] + [self] + for e in self.exprs: + e._checkRecursion(subRecCheckList) + if not e.mayReturnEmpty: + break + + def _generateDefaultName(self): + inner = " ".join(str(e) for e in self.exprs) + # strip off redundant inner {}'s + while len(inner) > 1 and inner[0 :: len(inner) - 1] == "{}": + inner = inner[1:-1] + return "{" + inner + "}" + + +class Or(ParseExpression): + """Requires that at least one :class:`ParseExpression` is found. If + two expressions match, the expression that matches the longest + string will be used. May be constructed using the ``'^'`` + operator. + + Example:: + + # construct Or using '^' operator + + number = Word(nums) ^ Combine(Word(nums) + '.' + Word(nums)) + print(number.search_string("123 3.1416 789")) + + prints:: + + [['123'], ['3.1416'], ['789']] + """ + + def __init__(self, exprs: IterableType[ParserElement], savelist: bool = False): + super().__init__(exprs, savelist) + if self.exprs: + self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs) + self.skipWhitespace = all(e.skipWhitespace for e in self.exprs) + else: + self.mayReturnEmpty = True + + def streamline(self) -> ParserElement: + super().streamline() + if self.exprs: + self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs) + self.saveAsList = any(e.saveAsList for e in self.exprs) + self.skipWhitespace = all( + e.skipWhitespace and not isinstance(e, White) for e in self.exprs + ) + else: + self.saveAsList = False + return self + + def parseImpl(self, instring, loc, doActions=True): + maxExcLoc = -1 + maxException = None + matches = [] + fatals = [] + if all(e.callPreparse for e in self.exprs): + loc = self.preParse(instring, loc) + for e in self.exprs: + try: + loc2 = e.try_parse(instring, loc, raise_fatal=True) + except ParseFatalException as pfe: + pfe.__traceback__ = None + pfe.parserElement = e + fatals.append(pfe) + maxException = None + maxExcLoc = -1 + except ParseException as err: + if not fatals: + err.__traceback__ = None + if err.loc > maxExcLoc: + maxException = err + maxExcLoc = err.loc + except IndexError: + if len(instring) > maxExcLoc: + maxException = ParseException( + instring, len(instring), e.errmsg, self + ) + maxExcLoc = len(instring) + else: + # save match among all matches, to retry longest to shortest + matches.append((loc2, e)) + + if matches: + # re-evaluate all matches in descending order of length of match, in case attached actions + # might change whether or how much they match of the input. + matches.sort(key=itemgetter(0), reverse=True) + + if not doActions: + # no further conditions or parse actions to change the selection of + # alternative, so the first match will be the best match + best_expr = matches[0][1] + return best_expr._parse(instring, loc, doActions) + + longest = -1, None + for loc1, expr1 in matches: + if loc1 <= longest[0]: + # already have a longer match than this one will deliver, we are done + return longest + + try: + loc2, toks = expr1._parse(instring, loc, doActions) + except ParseException as err: + err.__traceback__ = None + if err.loc > maxExcLoc: + maxException = err + maxExcLoc = err.loc + else: + if loc2 >= loc1: + return loc2, toks + # didn't match as much as before + elif loc2 > longest[0]: + longest = loc2, toks + + if longest != (-1, None): + return longest + + if fatals: + if len(fatals) > 1: + fatals.sort(key=lambda e: -e.loc) + if fatals[0].loc == fatals[1].loc: + fatals.sort(key=lambda e: (-e.loc, -len(str(e.parserElement)))) + max_fatal = fatals[0] + raise max_fatal + + if maxException is not None: + maxException.msg = self.errmsg + raise maxException + else: + raise ParseException( + instring, loc, "no defined alternatives to match", self + ) + + def __ixor__(self, other): + if isinstance(other, str_type): + other = self._literalStringClass(other) + return self.append(other) # Or([self, other]) + + def _generateDefaultName(self): + return "{" + " ^ ".join(str(e) for e in self.exprs) + "}" + + def _setResultsName(self, name, listAllMatches=False): + if ( + __diag__.warn_multiple_tokens_in_named_alternation + and Diagnostics.warn_multiple_tokens_in_named_alternation + not in self.suppress_warnings_ + ): + if any( + isinstance(e, And) + and Diagnostics.warn_multiple_tokens_in_named_alternation + not in e.suppress_warnings_ + for e in self.exprs + ): + warnings.warn( + "{}: setting results name {!r} on {} expression " + "will return a list of all parsed tokens in an And alternative, " + "in prior versions only the first token was returned; enclose " + "contained argument in Group".format( + "warn_multiple_tokens_in_named_alternation", + name, + type(self).__name__, + ), + stacklevel=3, + ) + + return super()._setResultsName(name, listAllMatches) + + +class MatchFirst(ParseExpression): + """Requires that at least one :class:`ParseExpression` is found. If + more than one expression matches, the first one listed is the one that will + match. May be constructed using the ``'|'`` operator. + + Example:: + + # construct MatchFirst using '|' operator + + # watch the order of expressions to match + number = Word(nums) | Combine(Word(nums) + '.' + Word(nums)) + print(number.search_string("123 3.1416 789")) # Fail! -> [['123'], ['3'], ['1416'], ['789']] + + # put more selective expression first + number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums) + print(number.search_string("123 3.1416 789")) # Better -> [['123'], ['3.1416'], ['789']] + """ + + def __init__(self, exprs: IterableType[ParserElement], savelist: bool = False): + super().__init__(exprs, savelist) + if self.exprs: + self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs) + self.skipWhitespace = all(e.skipWhitespace for e in self.exprs) + else: + self.mayReturnEmpty = True + + def streamline(self) -> ParserElement: + if self.streamlined: + return self + + super().streamline() + if self.exprs: + self.saveAsList = any(e.saveAsList for e in self.exprs) + self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs) + self.skipWhitespace = all( + e.skipWhitespace and not isinstance(e, White) for e in self.exprs + ) + else: + self.saveAsList = False + self.mayReturnEmpty = True + return self + + def parseImpl(self, instring, loc, doActions=True): + maxExcLoc = -1 + maxException = None + + for e in self.exprs: + try: + return e._parse( + instring, + loc, + doActions, + ) + except ParseFatalException as pfe: + pfe.__traceback__ = None + pfe.parserElement = e + raise + except ParseException as err: + if err.loc > maxExcLoc: + maxException = err + maxExcLoc = err.loc + except IndexError: + if len(instring) > maxExcLoc: + maxException = ParseException( + instring, len(instring), e.errmsg, self + ) + maxExcLoc = len(instring) + + if maxException is not None: + maxException.msg = self.errmsg + raise maxException + else: + raise ParseException( + instring, loc, "no defined alternatives to match", self + ) + + def __ior__(self, other): + if isinstance(other, str_type): + other = self._literalStringClass(other) + return self.append(other) # MatchFirst([self, other]) + + def _generateDefaultName(self): + return "{" + " | ".join(str(e) for e in self.exprs) + "}" + + def _setResultsName(self, name, listAllMatches=False): + if ( + __diag__.warn_multiple_tokens_in_named_alternation + and Diagnostics.warn_multiple_tokens_in_named_alternation + not in self.suppress_warnings_ + ): + if any( + isinstance(e, And) + and Diagnostics.warn_multiple_tokens_in_named_alternation + not in e.suppress_warnings_ + for e in self.exprs + ): + warnings.warn( + "{}: setting results name {!r} on {} expression " + "will return a list of all parsed tokens in an And alternative, " + "in prior versions only the first token was returned; enclose " + "contained argument in Group".format( + "warn_multiple_tokens_in_named_alternation", + name, + type(self).__name__, + ), + stacklevel=3, + ) + + return super()._setResultsName(name, listAllMatches) + + +class Each(ParseExpression): + """Requires all given :class:`ParseExpression` s to be found, but in + any order. Expressions may be separated by whitespace. + + May be constructed using the ``'&'`` operator. + + Example:: + + color = one_of("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN") + shape_type = one_of("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON") + integer = Word(nums) + shape_attr = "shape:" + shape_type("shape") + posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn") + color_attr = "color:" + color("color") + size_attr = "size:" + integer("size") + + # use Each (using operator '&') to accept attributes in any order + # (shape and posn are required, color and size are optional) + shape_spec = shape_attr & posn_attr & Opt(color_attr) & Opt(size_attr) + + shape_spec.run_tests(''' + shape: SQUARE color: BLACK posn: 100, 120 + shape: CIRCLE size: 50 color: BLUE posn: 50,80 + color:GREEN size:20 shape:TRIANGLE posn:20,40 + ''' + ) + + prints:: + + shape: SQUARE color: BLACK posn: 100, 120 + ['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']] + - color: BLACK + - posn: ['100', ',', '120'] + - x: 100 + - y: 120 + - shape: SQUARE + + + shape: CIRCLE size: 50 color: BLUE posn: 50,80 + ['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']] + - color: BLUE + - posn: ['50', ',', '80'] + - x: 50 + - y: 80 + - shape: CIRCLE + - size: 50 + + + color: GREEN size: 20 shape: TRIANGLE posn: 20,40 + ['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']] + - color: GREEN + - posn: ['20', ',', '40'] + - x: 20 + - y: 40 + - shape: TRIANGLE + - size: 20 + """ + + def __init__(self, exprs: IterableType[ParserElement], savelist: bool = True): + super().__init__(exprs, savelist) + if self.exprs: + self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs) + else: + self.mayReturnEmpty = True + self.skipWhitespace = True + self.initExprGroups = True + self.saveAsList = True + + def streamline(self) -> ParserElement: + super().streamline() + if self.exprs: + self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs) + else: + self.mayReturnEmpty = True + return self + + def parseImpl(self, instring, loc, doActions=True): + if self.initExprGroups: + self.opt1map = dict( + (id(e.expr), e) for e in self.exprs if isinstance(e, Opt) + ) + opt1 = [e.expr for e in self.exprs if isinstance(e, Opt)] + opt2 = [ + e + for e in self.exprs + if e.mayReturnEmpty and not isinstance(e, (Opt, Regex, ZeroOrMore)) + ] + self.optionals = opt1 + opt2 + self.multioptionals = [ + e.expr.set_results_name(e.resultsName, list_all_matches=True) + for e in self.exprs + if isinstance(e, _MultipleMatch) + ] + self.multirequired = [ + e.expr.set_results_name(e.resultsName, list_all_matches=True) + for e in self.exprs + if isinstance(e, OneOrMore) + ] + self.required = [ + e for e in self.exprs if not isinstance(e, (Opt, ZeroOrMore, OneOrMore)) + ] + self.required += self.multirequired + self.initExprGroups = False + + tmpLoc = loc + tmpReqd = self.required[:] + tmpOpt = self.optionals[:] + multis = self.multioptionals[:] + matchOrder = [] + + keepMatching = True + failed = [] + fatals = [] + while keepMatching: + tmpExprs = tmpReqd + tmpOpt + multis + failed.clear() + fatals.clear() + for e in tmpExprs: + try: + tmpLoc = e.try_parse(instring, tmpLoc, raise_fatal=True) + except ParseFatalException as pfe: + pfe.__traceback__ = None + pfe.parserElement = e + fatals.append(pfe) + failed.append(e) + except ParseException: + failed.append(e) + else: + matchOrder.append(self.opt1map.get(id(e), e)) + if e in tmpReqd: + tmpReqd.remove(e) + elif e in tmpOpt: + tmpOpt.remove(e) + if len(failed) == len(tmpExprs): + keepMatching = False + + # look for any ParseFatalExceptions + if fatals: + if len(fatals) > 1: + fatals.sort(key=lambda e: -e.loc) + if fatals[0].loc == fatals[1].loc: + fatals.sort(key=lambda e: (-e.loc, -len(str(e.parserElement)))) + max_fatal = fatals[0] + raise max_fatal + + if tmpReqd: + missing = ", ".join([str(e) for e in tmpReqd]) + raise ParseException( + instring, + loc, + "Missing one or more required elements ({})".format(missing), + ) + + # add any unmatched Opts, in case they have default values defined + matchOrder += [e for e in self.exprs if isinstance(e, Opt) and e.expr in tmpOpt] + + total_results = ParseResults([]) + for e in matchOrder: + loc, results = e._parse(instring, loc, doActions) + total_results += results + + return loc, total_results + + def _generateDefaultName(self): + return "{" + " & ".join(str(e) for e in self.exprs) + "}" + + +class ParseElementEnhance(ParserElement): + """Abstract subclass of :class:`ParserElement`, for combining and + post-processing parsed tokens. + """ + + def __init__(self, expr: Union[ParserElement, str], savelist: bool = False): + super().__init__(savelist) + if isinstance(expr, str_type): + if issubclass(self._literalStringClass, Token): + expr = self._literalStringClass(expr) + elif issubclass(type(self), self._literalStringClass): + expr = Literal(expr) + else: + expr = self._literalStringClass(Literal(expr)) + self.expr = expr + if expr is not None: + self.mayIndexError = expr.mayIndexError + self.mayReturnEmpty = expr.mayReturnEmpty + self.set_whitespace_chars( + expr.whiteChars, copy_defaults=expr.copyDefaultWhiteChars + ) + self.skipWhitespace = expr.skipWhitespace + self.saveAsList = expr.saveAsList + self.callPreparse = expr.callPreparse + self.ignoreExprs.extend(expr.ignoreExprs) + + def recurse(self) -> Sequence[ParserElement]: + return [self.expr] if self.expr is not None else [] + + def parseImpl(self, instring, loc, doActions=True): + if self.expr is not None: + return self.expr._parse(instring, loc, doActions, callPreParse=False) + else: + raise ParseException(instring, loc, "No expression defined", self) + + def leave_whitespace(self, recursive: bool = True) -> ParserElement: + super().leave_whitespace(recursive) + + if recursive: + self.expr = self.expr.copy() + if self.expr is not None: + self.expr.leave_whitespace(recursive) + return self + + def ignore_whitespace(self, recursive: bool = True) -> ParserElement: + super().ignore_whitespace(recursive) + + if recursive: + self.expr = self.expr.copy() + if self.expr is not None: + self.expr.ignore_whitespace(recursive) + return self + + def ignore(self, other) -> ParserElement: + if isinstance(other, Suppress): + if other not in self.ignoreExprs: + super().ignore(other) + if self.expr is not None: + self.expr.ignore(self.ignoreExprs[-1]) + else: + super().ignore(other) + if self.expr is not None: + self.expr.ignore(self.ignoreExprs[-1]) + return self + + def streamline(self) -> ParserElement: + super().streamline() + if self.expr is not None: + self.expr.streamline() + return self + + def _checkRecursion(self, parseElementList): + if self in parseElementList: + raise RecursiveGrammarException(parseElementList + [self]) + subRecCheckList = parseElementList[:] + [self] + if self.expr is not None: + self.expr._checkRecursion(subRecCheckList) + + def validate(self, validateTrace=None) -> None: + if validateTrace is None: + validateTrace = [] + tmp = validateTrace[:] + [self] + if self.expr is not None: + self.expr.validate(tmp) + self._checkRecursion([]) + + def _generateDefaultName(self): + return "{}:({})".format(self.__class__.__name__, str(self.expr)) + + ignoreWhitespace = ignore_whitespace + leaveWhitespace = leave_whitespace + + +class IndentedBlock(ParseElementEnhance): + """ + Expression to match one or more expressions at a given indentation level. + Useful for parsing text where structure is implied by indentation (like Python source code). + """ + + class _Indent(Empty): + def __init__(self, ref_col: int): + super().__init__() + self.errmsg = "expected indent at column {}".format(ref_col) + self.add_condition(lambda s, l, t: col(l, s) == ref_col) + + class _IndentGreater(Empty): + def __init__(self, ref_col: int): + super().__init__() + self.errmsg = "expected indent at column greater than {}".format(ref_col) + self.add_condition(lambda s, l, t: col(l, s) > ref_col) + + def __init__( + self, expr: ParserElement, *, recursive: bool = False, grouped: bool = True + ): + super().__init__(expr, savelist=True) + # if recursive: + # raise NotImplementedError("IndentedBlock with recursive is not implemented") + self._recursive = recursive + self._grouped = grouped + self.parent_anchor = 1 + + def parseImpl(self, instring, loc, doActions=True): + # advance parse position to non-whitespace by using an Empty() + # this should be the column to be used for all subsequent indented lines + anchor_loc = Empty().preParse(instring, loc) + + # see if self.expr matches at the current location - if not it will raise an exception + # and no further work is necessary + self.expr.try_parse(instring, anchor_loc, doActions) + + indent_col = col(anchor_loc, instring) + peer_detect_expr = self._Indent(indent_col) + + inner_expr = Empty() + peer_detect_expr + self.expr + if self._recursive: + sub_indent = self._IndentGreater(indent_col) + nested_block = IndentedBlock( + self.expr, recursive=self._recursive, grouped=self._grouped + ) + nested_block.set_debug(self.debug) + nested_block.parent_anchor = indent_col + inner_expr += Opt(sub_indent + nested_block) + + inner_expr.set_name(f"inner {hex(id(inner_expr))[-4:].upper()}@{indent_col}") + block = OneOrMore(inner_expr) + + trailing_undent = self._Indent(self.parent_anchor) | StringEnd() + + if self._grouped: + wrapper = Group + else: + wrapper = lambda expr: expr + return (wrapper(block) + Optional(trailing_undent)).parseImpl( + instring, anchor_loc, doActions + ) + + +class AtStringStart(ParseElementEnhance): + """Matches if expression matches at the beginning of the parse + string:: + + AtStringStart(Word(nums)).parse_string("123") + # prints ["123"] + + AtStringStart(Word(nums)).parse_string(" 123") + # raises ParseException + """ + + def __init__(self, expr: Union[ParserElement, str]): + super().__init__(expr) + self.callPreparse = False + + def parseImpl(self, instring, loc, doActions=True): + if loc != 0: + raise ParseException(instring, loc, "not found at string start") + return super().parseImpl(instring, loc, doActions) + + +class AtLineStart(ParseElementEnhance): + r"""Matches if an expression matches at the beginning of a line within + the parse string + + Example:: + + test = '''\ + AAA this line + AAA and this line + AAA but not this one + B AAA and definitely not this one + ''' + + for t in (AtLineStart('AAA') + restOfLine).search_string(test): + print(t) + + prints:: + + ['AAA', ' this line'] + ['AAA', ' and this line'] + + """ + + def __init__(self, expr: Union[ParserElement, str]): + super().__init__(expr) + self.callPreparse = False + + def parseImpl(self, instring, loc, doActions=True): + if col(loc, instring) != 1: + raise ParseException(instring, loc, "not found at line start") + return super().parseImpl(instring, loc, doActions) + + +class FollowedBy(ParseElementEnhance): + """Lookahead matching of the given parse expression. + ``FollowedBy`` does *not* advance the parsing position within + the input string, it only verifies that the specified parse + expression matches at the current position. ``FollowedBy`` + always returns a null token list. If any results names are defined + in the lookahead expression, those *will* be returned for access by + name. + + Example:: + + # use FollowedBy to match a label only if it is followed by a ':' + data_word = Word(alphas) + label = data_word + FollowedBy(':') + attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stop_on=label).set_parse_action(' '.join)) + + OneOrMore(attr_expr).parse_string("shape: SQUARE color: BLACK posn: upper left").pprint() + + prints:: + + [['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']] + """ + + def __init__(self, expr: Union[ParserElement, str]): + super().__init__(expr) + self.mayReturnEmpty = True + + def parseImpl(self, instring, loc, doActions=True): + # by using self._expr.parse and deleting the contents of the returned ParseResults list + # we keep any named results that were defined in the FollowedBy expression + _, ret = self.expr._parse(instring, loc, doActions=doActions) + del ret[:] + + return loc, ret + + +class PrecededBy(ParseElementEnhance): + """Lookbehind matching of the given parse expression. + ``PrecededBy`` does not advance the parsing position within the + input string, it only verifies that the specified parse expression + matches prior to the current position. ``PrecededBy`` always + returns a null token list, but if a results name is defined on the + given expression, it is returned. + + Parameters: + + - expr - expression that must match prior to the current parse + location + - retreat - (default= ``None``) - (int) maximum number of characters + to lookbehind prior to the current parse location + + If the lookbehind expression is a string, :class:`Literal`, + :class:`Keyword`, or a :class:`Word` or :class:`CharsNotIn` + with a specified exact or maximum length, then the retreat + parameter is not required. Otherwise, retreat must be specified to + give a maximum number of characters to look back from + the current parse position for a lookbehind match. + + Example:: + + # VB-style variable names with type prefixes + int_var = PrecededBy("#") + pyparsing_common.identifier + str_var = PrecededBy("$") + pyparsing_common.identifier + + """ + + def __init__( + self, expr: Union[ParserElement, str], retreat: OptionalType[int] = None + ): + super().__init__(expr) + self.expr = self.expr().leave_whitespace() + self.mayReturnEmpty = True + self.mayIndexError = False + self.exact = False + if isinstance(expr, str_type): + retreat = len(expr) + self.exact = True + elif isinstance(expr, (Literal, Keyword)): + retreat = expr.matchLen + self.exact = True + elif isinstance(expr, (Word, CharsNotIn)) and expr.maxLen != _MAX_INT: + retreat = expr.maxLen + self.exact = True + elif isinstance(expr, PositionToken): + retreat = 0 + self.exact = True + self.retreat = retreat + self.errmsg = "not preceded by " + str(expr) + self.skipWhitespace = False + self.parseAction.append(lambda s, l, t: t.__delitem__(slice(None, None))) + + def parseImpl(self, instring, loc=0, doActions=True): + if self.exact: + if loc < self.retreat: + raise ParseException(instring, loc, self.errmsg) + start = loc - self.retreat + _, ret = self.expr._parse(instring, start) + else: + # retreat specified a maximum lookbehind window, iterate + test_expr = self.expr + StringEnd() + instring_slice = instring[max(0, loc - self.retreat) : loc] + last_expr = ParseException(instring, loc, self.errmsg) + for offset in range(1, min(loc, self.retreat + 1) + 1): + try: + # print('trying', offset, instring_slice, repr(instring_slice[loc - offset:])) + _, ret = test_expr._parse( + instring_slice, len(instring_slice) - offset + ) + except ParseBaseException as pbe: + last_expr = pbe + else: + break + else: + raise last_expr + return loc, ret + + +class Located(ParseElementEnhance): + """ + Decorates a returned token with its starting and ending + locations in the input string. + + This helper adds the following results names: + + - ``locn_start`` - location where matched expression begins + - ``locn_end`` - location where matched expression ends + - ``value`` - the actual parsed results + + Be careful if the input text contains ```` characters, you + may want to call :class:`ParserElement.parse_with_tabs` + + Example:: + + wd = Word(alphas) + for match in Located(wd).search_string("ljsdf123lksdjjf123lkkjj1222"): + print(match) + + prints:: + + [0, ['ljsdf'], 5] + [8, ['lksdjjf'], 15] + [18, ['lkkjj'], 23] + + """ + + def parseImpl(self, instring, loc, doActions=True): + start = loc + loc, tokens = self.expr._parse(instring, start, doActions, callPreParse=False) + ret_tokens = ParseResults([start, tokens, loc]) + ret_tokens["locn_start"] = start + ret_tokens["value"] = tokens + ret_tokens["locn_end"] = loc + if self.resultsName: + # must return as a list, so that the name will be attached to the complete group + return loc, [ret_tokens] + else: + return loc, ret_tokens + + +class NotAny(ParseElementEnhance): + """ + Lookahead to disallow matching with the given parse expression. + ``NotAny`` does *not* advance the parsing position within the + input string, it only verifies that the specified parse expression + does *not* match at the current position. Also, ``NotAny`` does + *not* skip over leading whitespace. ``NotAny`` always returns + a null token list. May be constructed using the ``'~'`` operator. + + Example:: + + AND, OR, NOT = map(CaselessKeyword, "AND OR NOT".split()) + + # take care not to mistake keywords for identifiers + ident = ~(AND | OR | NOT) + Word(alphas) + boolean_term = Opt(NOT) + ident + + # very crude boolean expression - to support parenthesis groups and + # operation hierarchy, use infix_notation + boolean_expr = boolean_term + ZeroOrMore((AND | OR) + boolean_term) + + # integers that are followed by "." are actually floats + integer = Word(nums) + ~Char(".") + """ + + def __init__(self, expr: Union[ParserElement, str]): + super().__init__(expr) + # do NOT use self.leave_whitespace(), don't want to propagate to exprs + # self.leave_whitespace() + self.skipWhitespace = False + + self.mayReturnEmpty = True + self.errmsg = "Found unwanted token, " + str(self.expr) + + def parseImpl(self, instring, loc, doActions=True): + if self.expr.can_parse_next(instring, loc): + raise ParseException(instring, loc, self.errmsg, self) + return loc, [] + + def _generateDefaultName(self): + return "~{" + str(self.expr) + "}" + + +class _MultipleMatch(ParseElementEnhance): + def __init__( + self, + expr: ParserElement, + stop_on: OptionalType[Union[ParserElement, str]] = None, + *, + stopOn: OptionalType[Union[ParserElement, str]] = None, + ): + super().__init__(expr) + stopOn = stopOn or stop_on + self.saveAsList = True + ender = stopOn + if isinstance(ender, str_type): + ender = self._literalStringClass(ender) + self.stopOn(ender) + + def stopOn(self, ender) -> ParserElement: + if isinstance(ender, str_type): + ender = self._literalStringClass(ender) + self.not_ender = ~ender if ender is not None else None + return self + + def parseImpl(self, instring, loc, doActions=True): + self_expr_parse = self.expr._parse + self_skip_ignorables = self._skipIgnorables + check_ender = self.not_ender is not None + if check_ender: + try_not_ender = self.not_ender.tryParse + + # must be at least one (but first see if we are the stopOn sentinel; + # if so, fail) + if check_ender: + try_not_ender(instring, loc) + loc, tokens = self_expr_parse(instring, loc, doActions) + try: + hasIgnoreExprs = not not self.ignoreExprs + while 1: + if check_ender: + try_not_ender(instring, loc) + if hasIgnoreExprs: + preloc = self_skip_ignorables(instring, loc) + else: + preloc = loc + loc, tmptokens = self_expr_parse(instring, preloc, doActions) + if tmptokens or tmptokens.haskeys(): + tokens += tmptokens + except (ParseException, IndexError): + pass + + return loc, tokens + + def _setResultsName(self, name, listAllMatches=False): + if ( + __diag__.warn_ungrouped_named_tokens_in_collection + and Diagnostics.warn_ungrouped_named_tokens_in_collection + not in self.suppress_warnings_ + ): + for e in [self.expr] + self.expr.recurse(): + if ( + isinstance(e, ParserElement) + and e.resultsName + and Diagnostics.warn_ungrouped_named_tokens_in_collection + not in e.suppress_warnings_ + ): + warnings.warn( + "{}: setting results name {!r} on {} expression " + "collides with {!r} on contained expression".format( + "warn_ungrouped_named_tokens_in_collection", + name, + type(self).__name__, + e.resultsName, + ), + stacklevel=3, + ) + + return super()._setResultsName(name, listAllMatches) + + +class OneOrMore(_MultipleMatch): + """ + Repetition of one or more of the given expression. + + Parameters: + - expr - expression that must match one or more times + - stop_on - (default= ``None``) - expression for a terminating sentinel + (only required if the sentinel would ordinarily match the repetition + expression) + + Example:: + + data_word = Word(alphas) + label = data_word + FollowedBy(':') + attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).set_parse_action(' '.join)) + + text = "shape: SQUARE posn: upper left color: BLACK" + OneOrMore(attr_expr).parse_string(text).pprint() # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']] + + # use stop_on attribute for OneOrMore to avoid reading label string as part of the data + attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stop_on=label).set_parse_action(' '.join)) + OneOrMore(attr_expr).parse_string(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']] + + # could also be written as + (attr_expr * (1,)).parse_string(text).pprint() + """ + + def _generateDefaultName(self): + return "{" + str(self.expr) + "}..." + + +class ZeroOrMore(_MultipleMatch): + """ + Optional repetition of zero or more of the given expression. + + Parameters: + - ``expr`` - expression that must match zero or more times + - ``stop_on`` - expression for a terminating sentinel + (only required if the sentinel would ordinarily match the repetition + expression) - (default= ``None``) + + Example: similar to :class:`OneOrMore` + """ + + def __init__( + self, + expr: ParserElement, + stop_on: OptionalType[Union[ParserElement, str]] = None, + *, + stopOn: OptionalType[Union[ParserElement, str]] = None, + ): + super().__init__(expr, stopOn=stopOn or stop_on) + self.mayReturnEmpty = True + + def parseImpl(self, instring, loc, doActions=True): + try: + return super().parseImpl(instring, loc, doActions) + except (ParseException, IndexError): + return loc, ParseResults([], name=self.resultsName) + + def _generateDefaultName(self): + return "[" + str(self.expr) + "]..." + + +class _NullToken: + def __bool__(self): + return False + + def __str__(self): + return "" + + +class Opt(ParseElementEnhance): + """ + Optional matching of the given expression. + + Parameters: + - ``expr`` - expression that must match zero or more times + - ``default`` (optional) - value to be returned if the optional expression is not found. + + Example:: + + # US postal code can be a 5-digit zip, plus optional 4-digit qualifier + zip = Combine(Word(nums, exact=5) + Opt('-' + Word(nums, exact=4))) + zip.run_tests(''' + # traditional ZIP code + 12345 + + # ZIP+4 form + 12101-0001 + + # invalid ZIP + 98765- + ''') + + prints:: + + # traditional ZIP code + 12345 + ['12345'] + + # ZIP+4 form + 12101-0001 + ['12101-0001'] + + # invalid ZIP + 98765- + ^ + FAIL: Expected end of text (at char 5), (line:1, col:6) + """ + + __optionalNotMatched = _NullToken() + + def __init__( + self, expr: Union[ParserElement, str], default: Any = __optionalNotMatched + ): + super().__init__(expr, savelist=False) + self.saveAsList = self.expr.saveAsList + self.defaultValue = default + self.mayReturnEmpty = True + + def parseImpl(self, instring, loc, doActions=True): + self_expr = self.expr + try: + loc, tokens = self_expr._parse(instring, loc, doActions, callPreParse=False) + except (ParseException, IndexError): + default_value = self.defaultValue + if default_value is not self.__optionalNotMatched: + if self_expr.resultsName: + tokens = ParseResults([default_value]) + tokens[self_expr.resultsName] = default_value + else: + tokens = [default_value] + else: + tokens = [] + return loc, tokens + + def _generateDefaultName(self): + inner = str(self.expr) + # strip off redundant inner {}'s + while len(inner) > 1 and inner[0 :: len(inner) - 1] == "{}": + inner = inner[1:-1] + return "[" + inner + "]" + + +Optional = Opt + + +class SkipTo(ParseElementEnhance): + """ + Token for skipping over all undefined text until the matched + expression is found. + + Parameters: + - ``expr`` - target expression marking the end of the data to be skipped + - ``include`` - if ``True``, the target expression is also parsed + (the skipped text and target expression are returned as a 2-element + list) (default= ``False``). + - ``ignore`` - (default= ``None``) used to define grammars (typically quoted strings and + comments) that might contain false matches to the target expression + - ``fail_on`` - (default= ``None``) define expressions that are not allowed to be + included in the skipped test; if found before the target expression is found, + the :class:`SkipTo` is not a match + + Example:: + + report = ''' + Outstanding Issues Report - 1 Jan 2000 + + # | Severity | Description | Days Open + -----+----------+-------------------------------------------+----------- + 101 | Critical | Intermittent system crash | 6 + 94 | Cosmetic | Spelling error on Login ('log|n') | 14 + 79 | Minor | System slow when running too many reports | 47 + ''' + integer = Word(nums) + SEP = Suppress('|') + # use SkipTo to simply match everything up until the next SEP + # - ignore quoted strings, so that a '|' character inside a quoted string does not match + # - parse action will call token.strip() for each matched token, i.e., the description body + string_data = SkipTo(SEP, ignore=quoted_string) + string_data.set_parse_action(token_map(str.strip)) + ticket_expr = (integer("issue_num") + SEP + + string_data("sev") + SEP + + string_data("desc") + SEP + + integer("days_open")) + + for tkt in ticket_expr.search_string(report): + print tkt.dump() + + prints:: + + ['101', 'Critical', 'Intermittent system crash', '6'] + - days_open: '6' + - desc: 'Intermittent system crash' + - issue_num: '101' + - sev: 'Critical' + ['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14'] + - days_open: '14' + - desc: "Spelling error on Login ('log|n')" + - issue_num: '94' + - sev: 'Cosmetic' + ['79', 'Minor', 'System slow when running too many reports', '47'] + - days_open: '47' + - desc: 'System slow when running too many reports' + - issue_num: '79' + - sev: 'Minor' + """ + + def __init__( + self, + other: Union[ParserElement, str], + include: bool = False, + ignore: bool = None, + fail_on: OptionalType[Union[ParserElement, str]] = None, + *, + failOn: Union[ParserElement, str] = None, + ): + super().__init__(other) + failOn = failOn or fail_on + self.ignoreExpr = ignore + self.mayReturnEmpty = True + self.mayIndexError = False + self.includeMatch = include + self.saveAsList = False + if isinstance(failOn, str_type): + self.failOn = self._literalStringClass(failOn) + else: + self.failOn = failOn + self.errmsg = "No match found for " + str(self.expr) + + def parseImpl(self, instring, loc, doActions=True): + startloc = loc + instrlen = len(instring) + self_expr_parse = self.expr._parse + self_failOn_canParseNext = ( + self.failOn.canParseNext if self.failOn is not None else None + ) + self_ignoreExpr_tryParse = ( + self.ignoreExpr.tryParse if self.ignoreExpr is not None else None + ) + + tmploc = loc + while tmploc <= instrlen: + if self_failOn_canParseNext is not None: + # break if failOn expression matches + if self_failOn_canParseNext(instring, tmploc): + break + + if self_ignoreExpr_tryParse is not None: + # advance past ignore expressions + while 1: + try: + tmploc = self_ignoreExpr_tryParse(instring, tmploc) + except ParseBaseException: + break + + try: + self_expr_parse(instring, tmploc, doActions=False, callPreParse=False) + except (ParseException, IndexError): + # no match, advance loc in string + tmploc += 1 + else: + # matched skipto expr, done + break + + else: + # ran off the end of the input string without matching skipto expr, fail + raise ParseException(instring, loc, self.errmsg, self) + + # build up return values + loc = tmploc + skiptext = instring[startloc:loc] + skipresult = ParseResults(skiptext) + + if self.includeMatch: + loc, mat = self_expr_parse(instring, loc, doActions, callPreParse=False) + skipresult += mat + + return loc, skipresult + + +class Forward(ParseElementEnhance): + """ + Forward declaration of an expression to be defined later - + used for recursive grammars, such as algebraic infix notation. + When the expression is known, it is assigned to the ``Forward`` + variable using the ``'<<'`` operator. + + Note: take care when assigning to ``Forward`` not to overlook + precedence of operators. + + Specifically, ``'|'`` has a lower precedence than ``'<<'``, so that:: + + fwd_expr << a | b | c + + will actually be evaluated as:: + + (fwd_expr << a) | b | c + + thereby leaving b and c out as parseable alternatives. It is recommended that you + explicitly group the values inserted into the ``Forward``:: + + fwd_expr << (a | b | c) + + Converting to use the ``'<<='`` operator instead will avoid this problem. + + See :class:`ParseResults.pprint` for an example of a recursive + parser created using ``Forward``. + """ + + def __init__(self, other: OptionalType[Union[ParserElement, str]] = None): + self.caller_frame = traceback.extract_stack(limit=2)[0] + super().__init__(other, savelist=False) + self.lshift_line = None + + def __lshift__(self, other): + if hasattr(self, "caller_frame"): + del self.caller_frame + if isinstance(other, str_type): + other = self._literalStringClass(other) + self.expr = other + self.mayIndexError = self.expr.mayIndexError + self.mayReturnEmpty = self.expr.mayReturnEmpty + self.set_whitespace_chars( + self.expr.whiteChars, copy_defaults=self.expr.copyDefaultWhiteChars + ) + self.skipWhitespace = self.expr.skipWhitespace + self.saveAsList = self.expr.saveAsList + self.ignoreExprs.extend(self.expr.ignoreExprs) + self.lshift_line = traceback.extract_stack(limit=2)[-2] + return self + + def __ilshift__(self, other): + return self << other + + def __or__(self, other): + caller_line = traceback.extract_stack(limit=2)[-2] + if ( + __diag__.warn_on_match_first_with_lshift_operator + and caller_line == self.lshift_line + and Diagnostics.warn_on_match_first_with_lshift_operator + not in self.suppress_warnings_ + ): + warnings.warn( + "using '<<' operator with '|' is probably an error, use '<<='", + stacklevel=2, + ) + ret = super().__or__(other) + return ret + + def __del__(self): + # see if we are getting dropped because of '=' reassignment of var instead of '<<=' or '<<' + if ( + self.expr is None + and __diag__.warn_on_assignment_to_Forward + and Diagnostics.warn_on_assignment_to_Forward not in self.suppress_warnings_ + ): + warnings.warn_explicit( + "Forward defined here but no expression attached later using '<<=' or '<<'", + UserWarning, + filename=self.caller_frame.filename, + lineno=self.caller_frame.lineno, + ) + + def parseImpl(self, instring, loc, doActions=True): + if ( + self.expr is None + and __diag__.warn_on_parse_using_empty_Forward + and Diagnostics.warn_on_parse_using_empty_Forward + not in self.suppress_warnings_ + ): + # walk stack until parse_string, scan_string, search_string, or transform_string is found + parse_fns = [ + "parse_string", + "scan_string", + "search_string", + "transform_string", + ] + tb = traceback.extract_stack(limit=200) + for i, frm in enumerate(reversed(tb), start=1): + if frm.name in parse_fns: + stacklevel = i + 1 + break + else: + stacklevel = 2 + warnings.warn( + "Forward expression was never assigned a value, will not parse any input", + stacklevel=stacklevel, + ) + if not ParserElement._left_recursion_enabled: + return super().parseImpl(instring, loc, doActions) + # ## Bounded Recursion algorithm ## + # Recursion only needs to be processed at ``Forward`` elements, since they are + # the only ones that can actually refer to themselves. The general idea is + # to handle recursion stepwise: We start at no recursion, then recurse once, + # recurse twice, ..., until more recursion offers no benefit (we hit the bound). + # + # The "trick" here is that each ``Forward`` gets evaluated in two contexts + # - to *match* a specific recursion level, and + # - to *search* the bounded recursion level + # and the two run concurrently. The *search* must *match* each recursion level + # to find the best possible match. This is handled by a memo table, which + # provides the previous match to the next level match attempt. + # + # See also "Left Recursion in Parsing Expression Grammars", Medeiros et al. + # + # There is a complication since we not only *parse* but also *transform* via + # actions: We do not want to run the actions too often while expanding. Thus, + # we expand using `doActions=False` and only run `doActions=True` if the next + # recursion level is acceptable. + with ParserElement.recursion_lock: + memo = ParserElement.recursion_memos + try: + # we are parsing at a specific recursion expansion - use it as-is + prev_loc, prev_result = memo[loc, self, doActions] + if isinstance(prev_result, Exception): + raise prev_result + return prev_loc, prev_result.copy() + except KeyError: + act_key = (loc, self, True) + peek_key = (loc, self, False) + # we are searching for the best recursion expansion - keep on improving + # both `doActions` cases must be tracked separately here! + prev_loc, prev_peek = memo[peek_key] = ( + loc - 1, + ParseException( + instring, loc, "Forward recursion without base case", self + ), + ) + if doActions: + memo[act_key] = memo[peek_key] + while True: + try: + new_loc, new_peek = super().parseImpl(instring, loc, False) + except ParseException: + # we failed before getting any match – do not hide the error + if isinstance(prev_peek, Exception): + raise + new_loc, new_peek = prev_loc, prev_peek + # the match did not get better: we are done + if new_loc <= prev_loc: + if doActions: + # replace the match for doActions=False as well, + # in case the action did backtrack + prev_loc, prev_result = memo[peek_key] = memo[act_key] + del memo[peek_key], memo[act_key] + return prev_loc, prev_result.copy() + del memo[peek_key] + return prev_loc, prev_peek.copy() + # the match did get better: see if we can improve further + else: + if doActions: + try: + memo[act_key] = super().parseImpl(instring, loc, True) + except ParseException as e: + memo[peek_key] = memo[act_key] = (new_loc, e) + raise + prev_loc, prev_peek = memo[peek_key] = new_loc, new_peek + + def leave_whitespace(self, recursive: bool = True) -> ParserElement: + self.skipWhitespace = False + return self + + def ignore_whitespace(self, recursive: bool = True) -> ParserElement: + self.skipWhitespace = True + return self + + def streamline(self) -> ParserElement: + if not self.streamlined: + self.streamlined = True + if self.expr is not None: + self.expr.streamline() + return self + + def validate(self, validateTrace=None) -> None: + if validateTrace is None: + validateTrace = [] + + if self not in validateTrace: + tmp = validateTrace[:] + [self] + if self.expr is not None: + self.expr.validate(tmp) + self._checkRecursion([]) + + def _generateDefaultName(self): + # Avoid infinite recursion by setting a temporary _defaultName + self._defaultName = ": ..." + + # Use the string representation of main expression. + retString = "..." + try: + if self.expr is not None: + retString = str(self.expr)[:1000] + else: + retString = "None" + finally: + return self.__class__.__name__ + ": " + retString + + def copy(self) -> ParserElement: + if self.expr is not None: + return super().copy() + else: + ret = Forward() + ret <<= self + return ret + + def _setResultsName(self, name, list_all_matches=False): + if ( + __diag__.warn_name_set_on_empty_Forward + and Diagnostics.warn_name_set_on_empty_Forward + not in self.suppress_warnings_ + ): + if self.expr is None: + warnings.warn( + "{}: setting results name {!r} on {} expression " + "that has no contained expression".format( + "warn_name_set_on_empty_Forward", name, type(self).__name__ + ), + stacklevel=3, + ) + + return super()._setResultsName(name, list_all_matches) + + ignoreWhitespace = ignore_whitespace + leaveWhitespace = leave_whitespace + + +class TokenConverter(ParseElementEnhance): + """ + Abstract subclass of :class:`ParseExpression`, for converting parsed results. + """ + + def __init__(self, expr: Union[ParserElement, str], savelist=False): + super().__init__(expr) # , savelist) + self.saveAsList = False + + +class Combine(TokenConverter): + """Converter to concatenate all matching tokens to a single string. + By default, the matching patterns must also be contiguous in the + input string; this can be disabled by specifying + ``'adjacent=False'`` in the constructor. + + Example:: + + real = Word(nums) + '.' + Word(nums) + print(real.parse_string('3.1416')) # -> ['3', '.', '1416'] + # will also erroneously match the following + print(real.parse_string('3. 1416')) # -> ['3', '.', '1416'] + + real = Combine(Word(nums) + '.' + Word(nums)) + print(real.parse_string('3.1416')) # -> ['3.1416'] + # no match when there are internal spaces + print(real.parse_string('3. 1416')) # -> Exception: Expected W:(0123...) + """ + + def __init__( + self, + expr: ParserElement, + join_string: str = "", + adjacent: bool = True, + *, + joinString: OptionalType[str] = None, + ): + super().__init__(expr) + joinString = joinString if joinString is not None else join_string + # suppress whitespace-stripping in contained parse expressions, but re-enable it on the Combine itself + if adjacent: + self.leave_whitespace() + self.adjacent = adjacent + self.skipWhitespace = True + self.joinString = joinString + self.callPreparse = True + + def ignore(self, other) -> ParserElement: + if self.adjacent: + ParserElement.ignore(self, other) + else: + super().ignore(other) + return self + + def postParse(self, instring, loc, tokenlist): + retToks = tokenlist.copy() + del retToks[:] + retToks += ParseResults( + ["".join(tokenlist._asStringList(self.joinString))], modal=self.modalResults + ) + + if self.resultsName and retToks.haskeys(): + return [retToks] + else: + return retToks + + +class Group(TokenConverter): + """Converter to return the matched tokens as a list - useful for + returning tokens of :class:`ZeroOrMore` and :class:`OneOrMore` expressions. + + The optional ``aslist`` argument when set to True will return the + parsed tokens as a Python list instead of a pyparsing ParseResults. + + Example:: + + ident = Word(alphas) + num = Word(nums) + term = ident | num + func = ident + Opt(delimited_list(term)) + print(func.parse_string("fn a, b, 100")) + # -> ['fn', 'a', 'b', '100'] + + func = ident + Group(Opt(delimited_list(term))) + print(func.parse_string("fn a, b, 100")) + # -> ['fn', ['a', 'b', '100']] + """ + + def __init__(self, expr: ParserElement, aslist: bool = False): + super().__init__(expr) + self.saveAsList = True + self._asPythonList = aslist + + def postParse(self, instring, loc, tokenlist): + if self._asPythonList: + return ParseResults.List( + tokenlist.asList() + if isinstance(tokenlist, ParseResults) + else list(tokenlist) + ) + else: + return [tokenlist] + + +class Dict(TokenConverter): + """Converter to return a repetitive expression as a list, but also + as a dictionary. Each element can also be referenced using the first + token in the expression as its key. Useful for tabular report + scraping when the first column can be used as a item key. + + The optional ``asdict`` argument when set to True will return the + parsed tokens as a Python dict instead of a pyparsing ParseResults. + + Example:: + + data_word = Word(alphas) + label = data_word + FollowedBy(':') + + text = "shape: SQUARE posn: upper left color: light blue texture: burlap" + attr_expr = (label + Suppress(':') + OneOrMore(data_word, stop_on=label).set_parse_action(' '.join)) + + # print attributes as plain groups + print(OneOrMore(attr_expr).parse_string(text).dump()) + + # instead of OneOrMore(expr), parse using Dict(OneOrMore(Group(expr))) - Dict will auto-assign names + result = Dict(OneOrMore(Group(attr_expr))).parse_string(text) + print(result.dump()) + + # access named fields as dict entries, or output as dict + print(result['shape']) + print(result.as_dict()) + + prints:: + + ['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap'] + [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']] + - color: 'light blue' + - posn: 'upper left' + - shape: 'SQUARE' + - texture: 'burlap' + SQUARE + {'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'} + + See more examples at :class:`ParseResults` of accessing fields by results name. + """ + + def __init__(self, expr: ParserElement, asdict: bool = False): + super().__init__(expr) + self.saveAsList = True + self._asPythonDict = asdict + + def postParse(self, instring, loc, tokenlist): + for i, tok in enumerate(tokenlist): + if len(tok) == 0: + continue + + ikey = tok[0] + if isinstance(ikey, int): + ikey = str(ikey).strip() + + if len(tok) == 1: + tokenlist[ikey] = _ParseResultsWithOffset("", i) + + elif len(tok) == 2 and not isinstance(tok[1], ParseResults): + tokenlist[ikey] = _ParseResultsWithOffset(tok[1], i) + + else: + try: + dictvalue = tok.copy() # ParseResults(i) + except Exception: + exc = TypeError( + "could not extract dict values from parsed results" + " - Dict expression must contain Grouped expressions" + ) + raise exc from None + + del dictvalue[0] + + if len(dictvalue) != 1 or ( + isinstance(dictvalue, ParseResults) and dictvalue.haskeys() + ): + tokenlist[ikey] = _ParseResultsWithOffset(dictvalue, i) + else: + tokenlist[ikey] = _ParseResultsWithOffset(dictvalue[0], i) + + if self._asPythonDict: + return [tokenlist.as_dict()] if self.resultsName else tokenlist.as_dict() + else: + return [tokenlist] if self.resultsName else tokenlist + + +class Suppress(TokenConverter): + """Converter for ignoring the results of a parsed expression. + + Example:: + + source = "a, b, c,d" + wd = Word(alphas) + wd_list1 = wd + ZeroOrMore(',' + wd) + print(wd_list1.parse_string(source)) + + # often, delimiters that are useful during parsing are just in the + # way afterward - use Suppress to keep them out of the parsed output + wd_list2 = wd + ZeroOrMore(Suppress(',') + wd) + print(wd_list2.parse_string(source)) + + # Skipped text (using '...') can be suppressed as well + source = "lead in START relevant text END trailing text" + start_marker = Keyword("START") + end_marker = Keyword("END") + find_body = Suppress(...) + start_marker + ... + end_marker + print(find_body.parse_string(source) + + prints:: + + ['a', ',', 'b', ',', 'c', ',', 'd'] + ['a', 'b', 'c', 'd'] + ['START', 'relevant text ', 'END'] + + (See also :class:`delimited_list`.) + """ + + def __init__(self, expr: Union[ParserElement, str], savelist: bool = False): + if expr is ...: + expr = _PendingSkip(NoMatch()) + super().__init__(expr) + + def __add__(self, other) -> "ParserElement": + if isinstance(self.expr, _PendingSkip): + return Suppress(SkipTo(other)) + other + else: + return super().__add__(other) + + def __sub__(self, other) -> "ParserElement": + if isinstance(self.expr, _PendingSkip): + return Suppress(SkipTo(other)) - other + else: + return super().__sub__(other) + + def postParse(self, instring, loc, tokenlist): + return [] + + def suppress(self) -> ParserElement: + return self + + +def trace_parse_action(f: ParseAction) -> ParseAction: + """Decorator for debugging parse actions. + + When the parse action is called, this decorator will print + ``">> entering method-name(line:, , )"``. + When the parse action completes, the decorator will print + ``"<<"`` followed by the returned value, or any exception that the parse action raised. + + Example:: + + wd = Word(alphas) + + @trace_parse_action + def remove_duplicate_chars(tokens): + return ''.join(sorted(set(''.join(tokens)))) + + wds = OneOrMore(wd).set_parse_action(remove_duplicate_chars) + print(wds.parse_string("slkdjs sld sldd sdlf sdljf")) + + prints:: + + >>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {})) + < 3: + thisFunc = paArgs[0].__class__.__name__ + "." + thisFunc + sys.stderr.write( + ">>entering {}(line: {!r}, {}, {!r})\n".format(thisFunc, line(l, s), l, t) + ) + try: + ret = f(*paArgs) + except Exception as exc: + sys.stderr.write("< str: + r"""Helper to easily define string ranges for use in :class:`Word` + construction. Borrows syntax from regexp ``'[]'`` string range + definitions:: + + srange("[0-9]") -> "0123456789" + srange("[a-z]") -> "abcdefghijklmnopqrstuvwxyz" + srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_" + + The input string must be enclosed in []'s, and the returned string + is the expanded character set joined into a single string. The + values enclosed in the []'s may be: + + - a single character + - an escaped character with a leading backslash (such as ``\-`` + or ``\]``) + - an escaped hex character with a leading ``'\x'`` + (``\x21``, which is a ``'!'`` character) (``\0x##`` + is also supported for backwards compatibility) + - an escaped octal character with a leading ``'\0'`` + (``\041``, which is a ``'!'`` character) + - a range of any of the above, separated by a dash (``'a-z'``, + etc.) + - any combination of the above (``'aeiouy'``, + ``'a-zA-Z0-9_$'``, etc.) + """ + _expanded = ( + lambda p: p + if not isinstance(p, ParseResults) + else "".join(chr(c) for c in range(ord(p[0]), ord(p[1]) + 1)) + ) + try: + return "".join(_expanded(part) for part in _reBracketExpr.parse_string(s).body) + except Exception: + return "" + + +def token_map(func, *args) -> ParseAction: + """Helper to define a parse action by mapping a function to all + elements of a :class:`ParseResults` list. If any additional args are passed, + they are forwarded to the given function as additional arguments + after the token, as in + ``hex_integer = Word(hexnums).set_parse_action(token_map(int, 16))``, + which will convert the parsed data to an integer using base 16. + + Example (compare the last to example in :class:`ParserElement.transform_string`:: + + hex_ints = OneOrMore(Word(hexnums)).set_parse_action(token_map(int, 16)) + hex_ints.run_tests(''' + 00 11 22 aa FF 0a 0d 1a + ''') + + upperword = Word(alphas).set_parse_action(token_map(str.upper)) + OneOrMore(upperword).run_tests(''' + my kingdom for a horse + ''') + + wd = Word(alphas).set_parse_action(token_map(str.title)) + OneOrMore(wd).set_parse_action(' '.join).run_tests(''' + now is the winter of our discontent made glorious summer by this sun of york + ''') + + prints:: + + 00 11 22 aa FF 0a 0d 1a + [0, 17, 34, 170, 255, 10, 13, 26] + + my kingdom for a horse + ['MY', 'KINGDOM', 'FOR', 'A', 'HORSE'] + + now is the winter of our discontent made glorious summer by this sun of york + ['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York'] + """ + + def pa(s, l, t): + return [func(tokn, *args) for tokn in t] + + func_name = getattr(func, "__name__", getattr(func, "__class__").__name__) + pa.__name__ = func_name + + return pa + + +def autoname_elements() -> None: + """ + Utility to simplify mass-naming of parser elements, for + generating railroad diagram with named subdiagrams. + """ + for name, var in sys._getframe().f_back.f_locals.items(): + if isinstance(var, ParserElement) and not var.customName: + var.set_name(name) + + +dbl_quoted_string = Combine( + Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*') + '"' +).set_name("string enclosed in double quotes") + +sgl_quoted_string = Combine( + Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*") + "'" +).set_name("string enclosed in single quotes") + +quoted_string = Combine( + Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*') + '"' + | Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*") + "'" +).set_name("quotedString using single or double quotes") + +unicode_string = Combine("u" + quoted_string.copy()).set_name("unicode string literal") + + +alphas8bit = srange(r"[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]") +punc8bit = srange(r"[\0xa1-\0xbf\0xd7\0xf7]") + +# build list of built-in expressions, for future reference if a global default value +# gets updated +_builtin_exprs = [v for v in vars().values() if isinstance(v, ParserElement)] + +# backward compatibility names +tokenMap = token_map +conditionAsParseAction = condition_as_parse_action +nullDebugAction = null_debug_action +sglQuotedString = sgl_quoted_string +dblQuotedString = dbl_quoted_string +quotedString = quoted_string +unicodeString = unicode_string +lineStart = line_start +lineEnd = line_end +stringStart = string_start +stringEnd = string_end +traceParseAction = trace_parse_action diff --git a/setuptools/_vendor/pyparsing/diagram/__init__.py b/setuptools/_vendor/pyparsing/diagram/__init__.py new file mode 100644 index 0000000..2d0c587 --- /dev/null +++ b/setuptools/_vendor/pyparsing/diagram/__init__.py @@ -0,0 +1,611 @@ +import railroad +import pyparsing +from pkg_resources import resource_filename +from typing import ( + List, + Optional, + NamedTuple, + Generic, + TypeVar, + Dict, + Callable, + Set, + Iterable, +) +from jinja2 import Template +from io import StringIO +import inspect + + +with open(resource_filename(__name__, "template.jinja2"), encoding="utf-8") as fp: + template = Template(fp.read()) + +# Note: ideally this would be a dataclass, but we're supporting Python 3.5+ so we can't do this yet +NamedDiagram = NamedTuple( + "NamedDiagram", + [("name", str), ("diagram", Optional[railroad.DiagramItem]), ("index", int)], +) +""" +A simple structure for associating a name with a railroad diagram +""" + +T = TypeVar("T") + + +class EachItem(railroad.Group): + """ + Custom railroad item to compose a: + - Group containing a + - OneOrMore containing a + - Choice of the elements in the Each + with the group label indicating that all must be matched + """ + + all_label = "[ALL]" + + def __init__(self, *items): + choice_item = railroad.Choice(len(items) - 1, *items) + one_or_more_item = railroad.OneOrMore(item=choice_item) + super().__init__(one_or_more_item, label=self.all_label) + + +class AnnotatedItem(railroad.Group): + """ + Simple subclass of Group that creates an annotation label + """ + + def __init__(self, label: str, item): + super().__init__(item=item, label="[{}]".format(label) if label else label) + + +class EditablePartial(Generic[T]): + """ + Acts like a functools.partial, but can be edited. In other words, it represents a type that hasn't yet been + constructed. + """ + + # We need this here because the railroad constructors actually transform the data, so can't be called until the + # entire tree is assembled + + def __init__(self, func: Callable[..., T], args: list, kwargs: dict): + self.func = func + self.args = args + self.kwargs = kwargs + + @classmethod + def from_call(cls, func: Callable[..., T], *args, **kwargs) -> "EditablePartial[T]": + """ + If you call this function in the same way that you would call the constructor, it will store the arguments + as you expect. For example EditablePartial.from_call(Fraction, 1, 3)() == Fraction(1, 3) + """ + return EditablePartial(func=func, args=list(args), kwargs=kwargs) + + @property + def name(self): + return self.kwargs["name"] + + def __call__(self) -> T: + """ + Evaluate the partial and return the result + """ + args = self.args.copy() + kwargs = self.kwargs.copy() + + # This is a helpful hack to allow you to specify varargs parameters (e.g. *args) as keyword args (e.g. + # args=['list', 'of', 'things']) + arg_spec = inspect.getfullargspec(self.func) + if arg_spec.varargs in self.kwargs: + args += kwargs.pop(arg_spec.varargs) + + return self.func(*args, **kwargs) + + +def railroad_to_html(diagrams: List[NamedDiagram], **kwargs) -> str: + """ + Given a list of NamedDiagram, produce a single HTML string that visualises those diagrams + :params kwargs: kwargs to be passed in to the template + """ + data = [] + for diagram in diagrams: + io = StringIO() + diagram.diagram.writeSvg(io.write) + title = diagram.name + if diagram.index == 0: + title += " (root)" + data.append({"title": title, "text": "", "svg": io.getvalue()}) + + return template.render(diagrams=data, **kwargs) + + +def resolve_partial(partial: "EditablePartial[T]") -> T: + """ + Recursively resolves a collection of Partials into whatever type they are + """ + if isinstance(partial, EditablePartial): + partial.args = resolve_partial(partial.args) + partial.kwargs = resolve_partial(partial.kwargs) + return partial() + elif isinstance(partial, list): + return [resolve_partial(x) for x in partial] + elif isinstance(partial, dict): + return {key: resolve_partial(x) for key, x in partial.items()} + else: + return partial + + +def to_railroad( + element: pyparsing.ParserElement, + diagram_kwargs: Optional[dict] = None, + vertical: int = 3, + show_results_names: bool = False, + show_groups: bool = False, +) -> List[NamedDiagram]: + """ + Convert a pyparsing element tree into a list of diagrams. This is the recommended entrypoint to diagram + creation if you want to access the Railroad tree before it is converted to HTML + :param element: base element of the parser being diagrammed + :param diagram_kwargs: kwargs to pass to the Diagram() constructor + :param vertical: (optional) - int - limit at which number of alternatives should be + shown vertically instead of horizontally + :param show_results_names - bool to indicate whether results name annotations should be + included in the diagram + :param show_groups - bool to indicate whether groups should be highlighted with an unlabeled + surrounding box + """ + # Convert the whole tree underneath the root + lookup = ConverterState(diagram_kwargs=diagram_kwargs or {}) + _to_diagram_element( + element, + lookup=lookup, + parent=None, + vertical=vertical, + show_results_names=show_results_names, + show_groups=show_groups, + ) + + root_id = id(element) + # Convert the root if it hasn't been already + if root_id in lookup: + if not element.customName: + lookup[root_id].name = "" + lookup[root_id].mark_for_extraction(root_id, lookup, force=True) + + # Now that we're finished, we can convert from intermediate structures into Railroad elements + diags = list(lookup.diagrams.values()) + if len(diags) > 1: + # collapse out duplicate diags with the same name + seen = set() + deduped_diags = [] + for d in diags: + # don't extract SkipTo elements, they are uninformative as subdiagrams + if d.name == "...": + continue + if d.name is not None and d.name not in seen: + seen.add(d.name) + deduped_diags.append(d) + resolved = [resolve_partial(partial) for partial in deduped_diags] + else: + # special case - if just one diagram, always display it, even if + # it has no name + resolved = [resolve_partial(partial) for partial in diags] + return sorted(resolved, key=lambda diag: diag.index) + + +def _should_vertical( + specification: int, exprs: Iterable[pyparsing.ParserElement] +) -> bool: + """ + Returns true if we should return a vertical list of elements + """ + if specification is None: + return False + else: + return len(_visible_exprs(exprs)) >= specification + + +class ElementState: + """ + State recorded for an individual pyparsing Element + """ + + # Note: this should be a dataclass, but we have to support Python 3.5 + def __init__( + self, + element: pyparsing.ParserElement, + converted: EditablePartial, + parent: EditablePartial, + number: int, + name: str = None, + parent_index: Optional[int] = None, + ): + #: The pyparsing element that this represents + self.element: pyparsing.ParserElement = element + #: The name of the element + self.name: str = name + #: The output Railroad element in an unconverted state + self.converted: EditablePartial = converted + #: The parent Railroad element, which we store so that we can extract this if it's duplicated + self.parent: EditablePartial = parent + #: The order in which we found this element, used for sorting diagrams if this is extracted into a diagram + self.number: int = number + #: The index of this inside its parent + self.parent_index: Optional[int] = parent_index + #: If true, we should extract this out into a subdiagram + self.extract: bool = False + #: If true, all of this element's children have been filled out + self.complete: bool = False + + def mark_for_extraction( + self, el_id: int, state: "ConverterState", name: str = None, force: bool = False + ): + """ + Called when this instance has been seen twice, and thus should eventually be extracted into a sub-diagram + :param el_id: id of the element + :param state: element/diagram state tracker + :param name: name to use for this element's text + :param force: If true, force extraction now, regardless of the state of this. Only useful for extracting the + root element when we know we're finished + """ + self.extract = True + + # Set the name + if not self.name: + if name: + # Allow forcing a custom name + self.name = name + elif self.element.customName: + self.name = self.element.customName + else: + self.name = "" + + # Just because this is marked for extraction doesn't mean we can do it yet. We may have to wait for children + # to be added + # Also, if this is just a string literal etc, don't bother extracting it + if force or (self.complete and _worth_extracting(self.element)): + state.extract_into_diagram(el_id) + + +class ConverterState: + """ + Stores some state that persists between recursions into the element tree + """ + + def __init__(self, diagram_kwargs: Optional[dict] = None): + #: A dictionary mapping ParserElements to state relating to them + self._element_diagram_states: Dict[int, ElementState] = {} + #: A dictionary mapping ParserElement IDs to subdiagrams generated from them + self.diagrams: Dict[int, EditablePartial[NamedDiagram]] = {} + #: The index of the next unnamed element + self.unnamed_index: int = 1 + #: The index of the next element. This is used for sorting + self.index: int = 0 + #: Shared kwargs that are used to customize the construction of diagrams + self.diagram_kwargs: dict = diagram_kwargs or {} + self.extracted_diagram_names: Set[str] = set() + + def __setitem__(self, key: int, value: ElementState): + self._element_diagram_states[key] = value + + def __getitem__(self, key: int) -> ElementState: + return self._element_diagram_states[key] + + def __delitem__(self, key: int): + del self._element_diagram_states[key] + + def __contains__(self, key: int): + return key in self._element_diagram_states + + def generate_unnamed(self) -> int: + """ + Generate a number used in the name of an otherwise unnamed diagram + """ + self.unnamed_index += 1 + return self.unnamed_index + + def generate_index(self) -> int: + """ + Generate a number used to index a diagram + """ + self.index += 1 + return self.index + + def extract_into_diagram(self, el_id: int): + """ + Used when we encounter the same token twice in the same tree. When this + happens, we replace all instances of that token with a terminal, and + create a new subdiagram for the token + """ + position = self[el_id] + + # Replace the original definition of this element with a regular block + if position.parent: + ret = EditablePartial.from_call(railroad.NonTerminal, text=position.name) + if "item" in position.parent.kwargs: + position.parent.kwargs["item"] = ret + elif "items" in position.parent.kwargs: + position.parent.kwargs["items"][position.parent_index] = ret + + # If the element we're extracting is a group, skip to its content but keep the title + if position.converted.func == railroad.Group: + content = position.converted.kwargs["item"] + else: + content = position.converted + + self.diagrams[el_id] = EditablePartial.from_call( + NamedDiagram, + name=position.name, + diagram=EditablePartial.from_call( + railroad.Diagram, content, **self.diagram_kwargs + ), + index=position.number, + ) + + del self[el_id] + + +def _worth_extracting(element: pyparsing.ParserElement) -> bool: + """ + Returns true if this element is worth having its own sub-diagram. Simply, if any of its children + themselves have children, then its complex enough to extract + """ + children = element.recurse() + return any(child.recurse() for child in children) + + +def _apply_diagram_item_enhancements(fn): + """ + decorator to ensure enhancements to a diagram item (such as results name annotations) + get applied on return from _to_diagram_element (we do this since there are several + returns in _to_diagram_element) + """ + + def _inner( + element: pyparsing.ParserElement, + parent: Optional[EditablePartial], + lookup: ConverterState = None, + vertical: int = None, + index: int = 0, + name_hint: str = None, + show_results_names: bool = False, + show_groups: bool = False, + ) -> Optional[EditablePartial]: + + ret = fn( + element, + parent, + lookup, + vertical, + index, + name_hint, + show_results_names, + show_groups, + ) + + # apply annotation for results name, if present + if show_results_names and ret is not None: + element_results_name = element.resultsName + if element_results_name: + # add "*" to indicate if this is a "list all results" name + element_results_name += "" if element.modalResults else "*" + ret = EditablePartial.from_call( + railroad.Group, item=ret, label=element_results_name + ) + + return ret + + return _inner + + +def _visible_exprs(exprs: Iterable[pyparsing.ParserElement]): + non_diagramming_exprs = ( + pyparsing.ParseElementEnhance, + pyparsing.PositionToken, + pyparsing.And._ErrorStop, + ) + return [ + e + for e in exprs + if not (e.customName or e.resultsName or isinstance(e, non_diagramming_exprs)) + ] + + +@_apply_diagram_item_enhancements +def _to_diagram_element( + element: pyparsing.ParserElement, + parent: Optional[EditablePartial], + lookup: ConverterState = None, + vertical: int = None, + index: int = 0, + name_hint: str = None, + show_results_names: bool = False, + show_groups: bool = False, +) -> Optional[EditablePartial]: + """ + Recursively converts a PyParsing Element to a railroad Element + :param lookup: The shared converter state that keeps track of useful things + :param index: The index of this element within the parent + :param parent: The parent of this element in the output tree + :param vertical: Controls at what point we make a list of elements vertical. If this is an integer (the default), + it sets the threshold of the number of items before we go vertical. If True, always go vertical, if False, never + do so + :param name_hint: If provided, this will override the generated name + :param show_results_names: bool flag indicating whether to add annotations for results names + :returns: The converted version of the input element, but as a Partial that hasn't yet been constructed + :param show_groups: bool flag indicating whether to show groups using bounding box + """ + exprs = element.recurse() + name = name_hint or element.customName or element.__class__.__name__ + + # Python's id() is used to provide a unique identifier for elements + el_id = id(element) + + element_results_name = element.resultsName + + # Here we basically bypass processing certain wrapper elements if they contribute nothing to the diagram + if not element.customName: + if isinstance( + element, + ( + # pyparsing.TokenConverter, + # pyparsing.Forward, + pyparsing.Located, + ), + ): + # However, if this element has a useful custom name, and its child does not, we can pass it on to the child + if exprs: + if not exprs[0].customName: + propagated_name = name + else: + propagated_name = None + + return _to_diagram_element( + element.expr, + parent=parent, + lookup=lookup, + vertical=vertical, + index=index, + name_hint=propagated_name, + show_results_names=show_results_names, + show_groups=show_groups, + ) + + # If the element isn't worth extracting, we always treat it as the first time we say it + if _worth_extracting(element): + if el_id in lookup: + # If we've seen this element exactly once before, we are only just now finding out that it's a duplicate, + # so we have to extract it into a new diagram. + looked_up = lookup[el_id] + looked_up.mark_for_extraction(el_id, lookup, name=name_hint) + ret = EditablePartial.from_call(railroad.NonTerminal, text=looked_up.name) + return ret + + elif el_id in lookup.diagrams: + # If we have seen the element at least twice before, and have already extracted it into a subdiagram, we + # just put in a marker element that refers to the sub-diagram + ret = EditablePartial.from_call( + railroad.NonTerminal, text=lookup.diagrams[el_id].kwargs["name"] + ) + return ret + + # Recursively convert child elements + # Here we find the most relevant Railroad element for matching pyparsing Element + # We use ``items=[]`` here to hold the place for where the child elements will go once created + if isinstance(element, pyparsing.And): + # detect And's created with ``expr*N`` notation - for these use a OneOrMore with a repeat + # (all will have the same name, and resultsName) + if not exprs: + return None + if len(set((e.name, e.resultsName) for e in exprs)) == 1: + ret = EditablePartial.from_call( + railroad.OneOrMore, item="", repeat=str(len(exprs)) + ) + elif _should_vertical(vertical, exprs): + ret = EditablePartial.from_call(railroad.Stack, items=[]) + else: + ret = EditablePartial.from_call(railroad.Sequence, items=[]) + elif isinstance(element, (pyparsing.Or, pyparsing.MatchFirst)): + if not exprs: + return None + if _should_vertical(vertical, exprs): + ret = EditablePartial.from_call(railroad.Choice, 0, items=[]) + else: + ret = EditablePartial.from_call(railroad.HorizontalChoice, items=[]) + elif isinstance(element, pyparsing.Each): + if not exprs: + return None + ret = EditablePartial.from_call(EachItem, items=[]) + elif isinstance(element, pyparsing.NotAny): + ret = EditablePartial.from_call(AnnotatedItem, label="NOT", item="") + elif isinstance(element, pyparsing.FollowedBy): + ret = EditablePartial.from_call(AnnotatedItem, label="LOOKAHEAD", item="") + elif isinstance(element, pyparsing.PrecededBy): + ret = EditablePartial.from_call(AnnotatedItem, label="LOOKBEHIND", item="") + elif isinstance(element, pyparsing.Group): + if show_groups: + ret = EditablePartial.from_call(AnnotatedItem, label="", item="") + else: + ret = EditablePartial.from_call(railroad.Group, label="", item="") + elif isinstance(element, pyparsing.TokenConverter): + ret = EditablePartial.from_call(AnnotatedItem, label=type(element).__name__.lower(), item="") + elif isinstance(element, pyparsing.Opt): + ret = EditablePartial.from_call(railroad.Optional, item="") + elif isinstance(element, pyparsing.OneOrMore): + ret = EditablePartial.from_call(railroad.OneOrMore, item="") + elif isinstance(element, pyparsing.ZeroOrMore): + ret = EditablePartial.from_call(railroad.ZeroOrMore, item="") + elif isinstance(element, pyparsing.Group): + ret = EditablePartial.from_call( + railroad.Group, item=None, label=element_results_name + ) + elif isinstance(element, pyparsing.Empty) and not element.customName: + # Skip unnamed "Empty" elements + ret = None + elif len(exprs) > 1: + ret = EditablePartial.from_call(railroad.Sequence, items=[]) + elif len(exprs) > 0 and not element_results_name: + ret = EditablePartial.from_call(railroad.Group, item="", label=name) + else: + terminal = EditablePartial.from_call(railroad.Terminal, element.defaultName) + ret = terminal + + if ret is None: + return + + # Indicate this element's position in the tree so we can extract it if necessary + lookup[el_id] = ElementState( + element=element, + converted=ret, + parent=parent, + parent_index=index, + number=lookup.generate_index(), + ) + if element.customName: + lookup[el_id].mark_for_extraction(el_id, lookup, element.customName) + + i = 0 + for expr in exprs: + # Add a placeholder index in case we have to extract the child before we even add it to the parent + if "items" in ret.kwargs: + ret.kwargs["items"].insert(i, None) + + item = _to_diagram_element( + expr, + parent=ret, + lookup=lookup, + vertical=vertical, + index=i, + show_results_names=show_results_names, + show_groups=show_groups, + ) + + # Some elements don't need to be shown in the diagram + if item is not None: + if "item" in ret.kwargs: + ret.kwargs["item"] = item + elif "items" in ret.kwargs: + # If we've already extracted the child, don't touch this index, since it's occupied by a nonterminal + ret.kwargs["items"][i] = item + i += 1 + elif "items" in ret.kwargs: + # If we're supposed to skip this element, remove it from the parent + del ret.kwargs["items"][i] + + # If all this items children are none, skip this item + if ret and ( + ("items" in ret.kwargs and len(ret.kwargs["items"]) == 0) + or ("item" in ret.kwargs and ret.kwargs["item"] is None) + ): + ret = EditablePartial.from_call(railroad.Terminal, name) + + # Mark this element as "complete", ie it has all of its children + if el_id in lookup: + lookup[el_id].complete = True + + if el_id in lookup and lookup[el_id].extract and lookup[el_id].complete: + lookup.extract_into_diagram(el_id) + if ret is not None: + ret = EditablePartial.from_call( + railroad.NonTerminal, text=lookup.diagrams[el_id].kwargs["name"] + ) + + return ret diff --git a/setuptools/_vendor/pyparsing/diagram/template.jinja2 b/setuptools/_vendor/pyparsing/diagram/template.jinja2 new file mode 100644 index 0000000..d2219fb --- /dev/null +++ b/setuptools/_vendor/pyparsing/diagram/template.jinja2 @@ -0,0 +1,26 @@ + + + + {% if not head %} + + {% else %} + {{ hear | safe }} + {% endif %} + + +{{ body | safe }} +{% for diagram in diagrams %} +
+

{{ diagram.title }}

+
{{ diagram.text }}
+
+ {{ diagram.svg }} +
+
+{% endfor %} + + diff --git a/setuptools/_vendor/pyparsing/exceptions.py b/setuptools/_vendor/pyparsing/exceptions.py new file mode 100644 index 0000000..e06513e --- /dev/null +++ b/setuptools/_vendor/pyparsing/exceptions.py @@ -0,0 +1,267 @@ +# exceptions.py + +import re +import sys +from typing import Optional + +from .util import col, line, lineno, _collapse_string_to_ranges +from .unicode import pyparsing_unicode as ppu + + +class ExceptionWordUnicode(ppu.Latin1, ppu.LatinA, ppu.LatinB, ppu.Greek, ppu.Cyrillic): + pass + + +_extract_alphanums = _collapse_string_to_ranges(ExceptionWordUnicode.alphanums) +_exception_word_extractor = re.compile("([" + _extract_alphanums + "]{1,16})|.") + + +class ParseBaseException(Exception): + """base exception class for all parsing runtime exceptions""" + + # Performance tuning: we construct a *lot* of these, so keep this + # constructor as small and fast as possible + def __init__( + self, + pstr: str, + loc: int = 0, + msg: Optional[str] = None, + elem=None, + ): + self.loc = loc + if msg is None: + self.msg = pstr + self.pstr = "" + else: + self.msg = msg + self.pstr = pstr + self.parser_element = self.parserElement = elem + self.args = (pstr, loc, msg) + + @staticmethod + def explain_exception(exc, depth=16): + """ + Method to take an exception and translate the Python internal traceback into a list + of the pyparsing expressions that caused the exception to be raised. + + Parameters: + + - exc - exception raised during parsing (need not be a ParseException, in support + of Python exceptions that might be raised in a parse action) + - depth (default=16) - number of levels back in the stack trace to list expression + and function names; if None, the full stack trace names will be listed; if 0, only + the failing input line, marker, and exception string will be shown + + Returns a multi-line string listing the ParserElements and/or function names in the + exception's stack trace. + """ + import inspect + from .core import ParserElement + + if depth is None: + depth = sys.getrecursionlimit() + ret = [] + if isinstance(exc, ParseBaseException): + ret.append(exc.line) + ret.append(" " * (exc.column - 1) + "^") + ret.append("{}: {}".format(type(exc).__name__, exc)) + + if depth > 0: + callers = inspect.getinnerframes(exc.__traceback__, context=depth) + seen = set() + for i, ff in enumerate(callers[-depth:]): + frm = ff[0] + + f_self = frm.f_locals.get("self", None) + if isinstance(f_self, ParserElement): + if frm.f_code.co_name not in ("parseImpl", "_parseNoCache"): + continue + if id(f_self) in seen: + continue + seen.add(id(f_self)) + + self_type = type(f_self) + ret.append( + "{}.{} - {}".format( + self_type.__module__, self_type.__name__, f_self + ) + ) + + elif f_self is not None: + self_type = type(f_self) + ret.append("{}.{}".format(self_type.__module__, self_type.__name__)) + + else: + code = frm.f_code + if code.co_name in ("wrapper", ""): + continue + + ret.append("{}".format(code.co_name)) + + depth -= 1 + if not depth: + break + + return "\n".join(ret) + + @classmethod + def _from_exception(cls, pe): + """ + internal factory method to simplify creating one type of ParseException + from another - avoids having __init__ signature conflicts among subclasses + """ + return cls(pe.pstr, pe.loc, pe.msg, pe.parserElement) + + @property + def line(self) -> str: + """ + Return the line of text where the exception occurred. + """ + return line(self.loc, self.pstr) + + @property + def lineno(self) -> int: + """ + Return the 1-based line number of text where the exception occurred. + """ + return lineno(self.loc, self.pstr) + + @property + def col(self) -> int: + """ + Return the 1-based column on the line of text where the exception occurred. + """ + return col(self.loc, self.pstr) + + @property + def column(self) -> int: + """ + Return the 1-based column on the line of text where the exception occurred. + """ + return col(self.loc, self.pstr) + + def __str__(self) -> str: + if self.pstr: + if self.loc >= len(self.pstr): + foundstr = ", found end of text" + else: + # pull out next word at error location + found_match = _exception_word_extractor.match(self.pstr, self.loc) + if found_match is not None: + found = found_match.group(0) + else: + found = self.pstr[self.loc : self.loc + 1] + foundstr = (", found %r" % found).replace(r"\\", "\\") + else: + foundstr = "" + return "{}{} (at char {}), (line:{}, col:{})".format( + self.msg, foundstr, self.loc, self.lineno, self.column + ) + + def __repr__(self): + return str(self) + + def mark_input_line(self, marker_string: str = None, *, markerString=">!<") -> str: + """ + Extracts the exception line from the input string, and marks + the location of the exception with a special symbol. + """ + markerString = marker_string if marker_string is not None else markerString + line_str = self.line + line_column = self.column - 1 + if markerString: + line_str = "".join( + (line_str[:line_column], markerString, line_str[line_column:]) + ) + return line_str.strip() + + def explain(self, depth=16) -> str: + """ + Method to translate the Python internal traceback into a list + of the pyparsing expressions that caused the exception to be raised. + + Parameters: + + - depth (default=16) - number of levels back in the stack trace to list expression + and function names; if None, the full stack trace names will be listed; if 0, only + the failing input line, marker, and exception string will be shown + + Returns a multi-line string listing the ParserElements and/or function names in the + exception's stack trace. + + Example:: + + expr = pp.Word(pp.nums) * 3 + try: + expr.parse_string("123 456 A789") + except pp.ParseException as pe: + print(pe.explain(depth=0)) + + prints:: + + 123 456 A789 + ^ + ParseException: Expected W:(0-9), found 'A' (at char 8), (line:1, col:9) + + Note: the diagnostic output will include string representations of the expressions + that failed to parse. These representations will be more helpful if you use `set_name` to + give identifiable names to your expressions. Otherwise they will use the default string + forms, which may be cryptic to read. + + Note: pyparsing's default truncation of exception tracebacks may also truncate the + stack of expressions that are displayed in the ``explain`` output. To get the full listing + of parser expressions, you may have to set ``ParserElement.verbose_stacktrace = True`` + """ + return self.explain_exception(self, depth) + + markInputline = mark_input_line + + +class ParseException(ParseBaseException): + """ + Exception thrown when a parse expression doesn't match the input string + + Example:: + + try: + Word(nums).set_name("integer").parse_string("ABC") + except ParseException as pe: + print(pe) + print("column: {}".format(pe.column)) + + prints:: + + Expected integer (at char 0), (line:1, col:1) + column: 1 + + """ + + +class ParseFatalException(ParseBaseException): + """ + User-throwable exception thrown when inconsistent parse content + is found; stops all parsing immediately + """ + + +class ParseSyntaxException(ParseFatalException): + """ + Just like :class:`ParseFatalException`, but thrown internally + when an :class:`ErrorStop` ('-' operator) indicates + that parsing is to stop immediately because an unbacktrackable + syntax error has been found. + """ + + +class RecursiveGrammarException(Exception): + """ + Exception thrown by :class:`ParserElement.validate` if the + grammar could be left-recursive; parser may need to enable + left recursion using :class:`ParserElement.enable_left_recursion` + """ + + def __init__(self, parseElementList): + self.parseElementTrace = parseElementList + + def __str__(self) -> str: + return "RecursiveGrammarException: {}".format(self.parseElementTrace) diff --git a/setuptools/_vendor/pyparsing/helpers.py b/setuptools/_vendor/pyparsing/helpers.py new file mode 100644 index 0000000..be8a365 --- /dev/null +++ b/setuptools/_vendor/pyparsing/helpers.py @@ -0,0 +1,1083 @@ +# helpers.py +import html.entities +import re + +from . import __diag__ +from .core import * +from .util import _bslash, _flatten, _escape_regex_range_chars + + +# +# global helpers +# +def delimited_list( + expr: Union[str, ParserElement], + delim: Union[str, ParserElement] = ",", + combine: bool = False, + min: OptionalType[int] = None, + max: OptionalType[int] = None, + *, + allow_trailing_delim: bool = False, +) -> ParserElement: + """Helper to define a delimited list of expressions - the delimiter + defaults to ','. By default, the list elements and delimiters can + have intervening whitespace, and comments, but this can be + overridden by passing ``combine=True`` in the constructor. If + ``combine`` is set to ``True``, the matching tokens are + returned as a single token string, with the delimiters included; + otherwise, the matching tokens are returned as a list of tokens, + with the delimiters suppressed. + + If ``allow_trailing_delim`` is set to True, then the list may end with + a delimiter. + + Example:: + + delimited_list(Word(alphas)).parse_string("aa,bb,cc") # -> ['aa', 'bb', 'cc'] + delimited_list(Word(hexnums), delim=':', combine=True).parse_string("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE'] + """ + if isinstance(expr, str_type): + expr = ParserElement._literalStringClass(expr) + + dlName = "{expr} [{delim} {expr}]...{end}".format( + expr=str(expr.copy().streamline()), + delim=str(delim), + end=" [{}]".format(str(delim)) if allow_trailing_delim else "", + ) + + if not combine: + delim = Suppress(delim) + + if min is not None: + if min < 1: + raise ValueError("min must be greater than 0") + min -= 1 + if max is not None: + if min is not None and max <= min: + raise ValueError("max must be greater than, or equal to min") + max -= 1 + delimited_list_expr = expr + (delim + expr)[min, max] + + if allow_trailing_delim: + delimited_list_expr += Opt(delim) + + if combine: + return Combine(delimited_list_expr).set_name(dlName) + else: + return delimited_list_expr.set_name(dlName) + + +def counted_array( + expr: ParserElement, + int_expr: OptionalType[ParserElement] = None, + *, + intExpr: OptionalType[ParserElement] = None, +) -> ParserElement: + """Helper to define a counted list of expressions. + + This helper defines a pattern of the form:: + + integer expr expr expr... + + where the leading integer tells how many expr expressions follow. + The matched tokens returns the array of expr tokens as a list - the + leading count token is suppressed. + + If ``int_expr`` is specified, it should be a pyparsing expression + that produces an integer value. + + Example:: + + counted_array(Word(alphas)).parse_string('2 ab cd ef') # -> ['ab', 'cd'] + + # in this parser, the leading integer value is given in binary, + # '10' indicating that 2 values are in the array + binary_constant = Word('01').set_parse_action(lambda t: int(t[0], 2)) + counted_array(Word(alphas), int_expr=binary_constant).parse_string('10 ab cd ef') # -> ['ab', 'cd'] + + # if other fields must be parsed after the count but before the + # list items, give the fields results names and they will + # be preserved in the returned ParseResults: + count_with_metadata = integer + Word(alphas)("type") + typed_array = counted_array(Word(alphanums), int_expr=count_with_metadata)("items") + result = typed_array.parse_string("3 bool True True False") + print(result.dump()) + + # prints + # ['True', 'True', 'False'] + # - items: ['True', 'True', 'False'] + # - type: 'bool' + """ + intExpr = intExpr or int_expr + array_expr = Forward() + + def count_field_parse_action(s, l, t): + nonlocal array_expr + n = t[0] + array_expr <<= (expr * n) if n else Empty() + # clear list contents, but keep any named results + del t[:] + + if intExpr is None: + intExpr = Word(nums).set_parse_action(lambda t: int(t[0])) + else: + intExpr = intExpr.copy() + intExpr.set_name("arrayLen") + intExpr.add_parse_action(count_field_parse_action, call_during_try=True) + return (intExpr + array_expr).set_name("(len) " + str(expr) + "...") + + +def match_previous_literal(expr: ParserElement) -> ParserElement: + """Helper to define an expression that is indirectly defined from + the tokens matched in a previous expression, that is, it looks for + a 'repeat' of a previous expression. For example:: + + first = Word(nums) + second = match_previous_literal(first) + match_expr = first + ":" + second + + will match ``"1:1"``, but not ``"1:2"``. Because this + matches a previous literal, will also match the leading + ``"1:1"`` in ``"1:10"``. If this is not desired, use + :class:`match_previous_expr`. Do *not* use with packrat parsing + enabled. + """ + rep = Forward() + + def copy_token_to_repeater(s, l, t): + if t: + if len(t) == 1: + rep << t[0] + else: + # flatten t tokens + tflat = _flatten(t.as_list()) + rep << And(Literal(tt) for tt in tflat) + else: + rep << Empty() + + expr.add_parse_action(copy_token_to_repeater, callDuringTry=True) + rep.set_name("(prev) " + str(expr)) + return rep + + +def match_previous_expr(expr: ParserElement) -> ParserElement: + """Helper to define an expression that is indirectly defined from + the tokens matched in a previous expression, that is, it looks for + a 'repeat' of a previous expression. For example:: + + first = Word(nums) + second = match_previous_expr(first) + match_expr = first + ":" + second + + will match ``"1:1"``, but not ``"1:2"``. Because this + matches by expressions, will *not* match the leading ``"1:1"`` + in ``"1:10"``; the expressions are evaluated first, and then + compared, so ``"1"`` is compared with ``"10"``. Do *not* use + with packrat parsing enabled. + """ + rep = Forward() + e2 = expr.copy() + rep <<= e2 + + def copy_token_to_repeater(s, l, t): + matchTokens = _flatten(t.as_list()) + + def must_match_these_tokens(s, l, t): + theseTokens = _flatten(t.as_list()) + if theseTokens != matchTokens: + raise ParseException( + s, l, "Expected {}, found{}".format(matchTokens, theseTokens) + ) + + rep.set_parse_action(must_match_these_tokens, callDuringTry=True) + + expr.add_parse_action(copy_token_to_repeater, callDuringTry=True) + rep.set_name("(prev) " + str(expr)) + return rep + + +def one_of( + strs: Union[IterableType[str], str], + caseless: bool = False, + use_regex: bool = True, + as_keyword: bool = False, + *, + useRegex: bool = True, + asKeyword: bool = False, +) -> ParserElement: + """Helper to quickly define a set of alternative :class:`Literal` s, + and makes sure to do longest-first testing when there is a conflict, + regardless of the input order, but returns + a :class:`MatchFirst` for best performance. + + Parameters: + + - ``strs`` - a string of space-delimited literals, or a collection of + string literals + - ``caseless`` - treat all literals as caseless - (default= ``False``) + - ``use_regex`` - as an optimization, will + generate a :class:`Regex` object; otherwise, will generate + a :class:`MatchFirst` object (if ``caseless=True`` or ``asKeyword=True``, or if + creating a :class:`Regex` raises an exception) - (default= ``True``) + - ``as_keyword`` - enforce :class:`Keyword`-style matching on the + generated expressions - (default= ``False``) + - ``asKeyword`` and ``useRegex`` are retained for pre-PEP8 compatibility, + but will be removed in a future release + + Example:: + + comp_oper = one_of("< = > <= >= !=") + var = Word(alphas) + number = Word(nums) + term = var | number + comparison_expr = term + comp_oper + term + print(comparison_expr.search_string("B = 12 AA=23 B<=AA AA>12")) + + prints:: + + [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']] + """ + asKeyword = asKeyword or as_keyword + useRegex = useRegex and use_regex + + if ( + isinstance(caseless, str_type) + and __diag__.warn_on_multiple_string_args_to_oneof + ): + warnings.warn( + "More than one string argument passed to one_of, pass" + " choices as a list or space-delimited string", + stacklevel=2, + ) + + if caseless: + isequal = lambda a, b: a.upper() == b.upper() + masks = lambda a, b: b.upper().startswith(a.upper()) + parseElementClass = CaselessKeyword if asKeyword else CaselessLiteral + else: + isequal = lambda a, b: a == b + masks = lambda a, b: b.startswith(a) + parseElementClass = Keyword if asKeyword else Literal + + symbols: List[str] = [] + if isinstance(strs, str_type): + symbols = strs.split() + elif isinstance(strs, Iterable): + symbols = list(strs) + else: + raise TypeError("Invalid argument to one_of, expected string or iterable") + if not symbols: + return NoMatch() + + # reorder given symbols to take care to avoid masking longer choices with shorter ones + # (but only if the given symbols are not just single characters) + if any(len(sym) > 1 for sym in symbols): + i = 0 + while i < len(symbols) - 1: + cur = symbols[i] + for j, other in enumerate(symbols[i + 1 :]): + if isequal(other, cur): + del symbols[i + j + 1] + break + elif masks(cur, other): + del symbols[i + j + 1] + symbols.insert(i, other) + break + else: + i += 1 + + if useRegex: + re_flags: int = re.IGNORECASE if caseless else 0 + + try: + if all(len(sym) == 1 for sym in symbols): + # symbols are just single characters, create range regex pattern + patt = "[{}]".format( + "".join(_escape_regex_range_chars(sym) for sym in symbols) + ) + else: + patt = "|".join(re.escape(sym) for sym in symbols) + + # wrap with \b word break markers if defining as keywords + if asKeyword: + patt = r"\b(?:{})\b".format(patt) + + ret = Regex(patt, flags=re_flags).set_name(" | ".join(symbols)) + + if caseless: + # add parse action to return symbols as specified, not in random + # casing as found in input string + symbol_map = {sym.lower(): sym for sym in symbols} + ret.add_parse_action(lambda s, l, t: symbol_map[t[0].lower()]) + + return ret + + except re.error: + warnings.warn( + "Exception creating Regex for one_of, building MatchFirst", stacklevel=2 + ) + + # last resort, just use MatchFirst + return MatchFirst(parseElementClass(sym) for sym in symbols).set_name( + " | ".join(symbols) + ) + + +def dict_of(key: ParserElement, value: ParserElement) -> ParserElement: + """Helper to easily and clearly define a dictionary by specifying + the respective patterns for the key and value. Takes care of + defining the :class:`Dict`, :class:`ZeroOrMore`, and + :class:`Group` tokens in the proper order. The key pattern + can include delimiting markers or punctuation, as long as they are + suppressed, thereby leaving the significant key text. The value + pattern can include named results, so that the :class:`Dict` results + can include named token fields. + + Example:: + + text = "shape: SQUARE posn: upper left color: light blue texture: burlap" + attr_expr = (label + Suppress(':') + OneOrMore(data_word, stop_on=label).set_parse_action(' '.join)) + print(OneOrMore(attr_expr).parse_string(text).dump()) + + attr_label = label + attr_value = Suppress(':') + OneOrMore(data_word, stop_on=label).set_parse_action(' '.join) + + # similar to Dict, but simpler call format + result = dict_of(attr_label, attr_value).parse_string(text) + print(result.dump()) + print(result['shape']) + print(result.shape) # object attribute access works too + print(result.as_dict()) + + prints:: + + [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']] + - color: 'light blue' + - posn: 'upper left' + - shape: 'SQUARE' + - texture: 'burlap' + SQUARE + SQUARE + {'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'} + """ + return Dict(OneOrMore(Group(key + value))) + + +def original_text_for( + expr: ParserElement, as_string: bool = True, *, asString: bool = True +) -> ParserElement: + """Helper to return the original, untokenized text for a given + expression. Useful to restore the parsed fields of an HTML start + tag into the raw tag text itself, or to revert separate tokens with + intervening whitespace back to the original matching input text. By + default, returns astring containing the original parsed text. + + If the optional ``as_string`` argument is passed as + ``False``, then the return value is + a :class:`ParseResults` containing any results names that + were originally matched, and a single token containing the original + matched text from the input string. So if the expression passed to + :class:`original_text_for` contains expressions with defined + results names, you must set ``as_string`` to ``False`` if you + want to preserve those results name values. + + The ``asString`` pre-PEP8 argument is retained for compatibility, + but will be removed in a future release. + + Example:: + + src = "this is test bold text normal text " + for tag in ("b", "i"): + opener, closer = make_html_tags(tag) + patt = original_text_for(opener + SkipTo(closer) + closer) + print(patt.search_string(src)[0]) + + prints:: + + [' bold text '] + ['text'] + """ + asString = asString and as_string + + locMarker = Empty().set_parse_action(lambda s, loc, t: loc) + endlocMarker = locMarker.copy() + endlocMarker.callPreparse = False + matchExpr = locMarker("_original_start") + expr + endlocMarker("_original_end") + if asString: + extractText = lambda s, l, t: s[t._original_start : t._original_end] + else: + + def extractText(s, l, t): + t[:] = [s[t.pop("_original_start") : t.pop("_original_end")]] + + matchExpr.set_parse_action(extractText) + matchExpr.ignoreExprs = expr.ignoreExprs + matchExpr.suppress_warning(Diagnostics.warn_ungrouped_named_tokens_in_collection) + return matchExpr + + +def ungroup(expr: ParserElement) -> ParserElement: + """Helper to undo pyparsing's default grouping of And expressions, + even if all but one are non-empty. + """ + return TokenConverter(expr).add_parse_action(lambda t: t[0]) + + +def locatedExpr(expr: ParserElement) -> ParserElement: + """ + (DEPRECATED - future code should use the Located class) + Helper to decorate a returned token with its starting and ending + locations in the input string. + + This helper adds the following results names: + + - ``locn_start`` - location where matched expression begins + - ``locn_end`` - location where matched expression ends + - ``value`` - the actual parsed results + + Be careful if the input text contains ```` characters, you + may want to call :class:`ParserElement.parseWithTabs` + + Example:: + + wd = Word(alphas) + for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"): + print(match) + + prints:: + + [[0, 'ljsdf', 5]] + [[8, 'lksdjjf', 15]] + [[18, 'lkkjj', 23]] + """ + locator = Empty().set_parse_action(lambda ss, ll, tt: ll) + return Group( + locator("locn_start") + + expr("value") + + locator.copy().leaveWhitespace()("locn_end") + ) + + +def nested_expr( + opener: Union[str, ParserElement] = "(", + closer: Union[str, ParserElement] = ")", + content: OptionalType[ParserElement] = None, + ignore_expr: ParserElement = quoted_string(), + *, + ignoreExpr: ParserElement = quoted_string(), +) -> ParserElement: + """Helper method for defining nested lists enclosed in opening and + closing delimiters (``"("`` and ``")"`` are the default). + + Parameters: + - ``opener`` - opening character for a nested list + (default= ``"("``); can also be a pyparsing expression + - ``closer`` - closing character for a nested list + (default= ``")"``); can also be a pyparsing expression + - ``content`` - expression for items within the nested lists + (default= ``None``) + - ``ignore_expr`` - expression for ignoring opening and closing delimiters + (default= :class:`quoted_string`) + - ``ignoreExpr`` - this pre-PEP8 argument is retained for compatibility + but will be removed in a future release + + If an expression is not provided for the content argument, the + nested expression will capture all whitespace-delimited content + between delimiters as a list of separate values. + + Use the ``ignore_expr`` argument to define expressions that may + contain opening or closing characters that should not be treated as + opening or closing characters for nesting, such as quoted_string or + a comment expression. Specify multiple expressions using an + :class:`Or` or :class:`MatchFirst`. The default is + :class:`quoted_string`, but if no expressions are to be ignored, then + pass ``None`` for this argument. + + Example:: + + data_type = one_of("void int short long char float double") + decl_data_type = Combine(data_type + Opt(Word('*'))) + ident = Word(alphas+'_', alphanums+'_') + number = pyparsing_common.number + arg = Group(decl_data_type + ident) + LPAR, RPAR = map(Suppress, "()") + + code_body = nested_expr('{', '}', ignore_expr=(quoted_string | c_style_comment)) + + c_function = (decl_data_type("type") + + ident("name") + + LPAR + Opt(delimited_list(arg), [])("args") + RPAR + + code_body("body")) + c_function.ignore(c_style_comment) + + source_code = ''' + int is_odd(int x) { + return (x%2); + } + + int dec_to_hex(char hchar) { + if (hchar >= '0' && hchar <= '9') { + return (ord(hchar)-ord('0')); + } else { + return (10+ord(hchar)-ord('A')); + } + } + ''' + for func in c_function.search_string(source_code): + print("%(name)s (%(type)s) args: %(args)s" % func) + + + prints:: + + is_odd (int) args: [['int', 'x']] + dec_to_hex (int) args: [['char', 'hchar']] + """ + if ignoreExpr != ignore_expr: + ignoreExpr = ignore_expr if ignoreExpr == quoted_string() else ignoreExpr + if opener == closer: + raise ValueError("opening and closing strings cannot be the same") + if content is None: + if isinstance(opener, str_type) and isinstance(closer, str_type): + if len(opener) == 1 and len(closer) == 1: + if ignoreExpr is not None: + content = Combine( + OneOrMore( + ~ignoreExpr + + CharsNotIn( + opener + closer + ParserElement.DEFAULT_WHITE_CHARS, + exact=1, + ) + ) + ).set_parse_action(lambda t: t[0].strip()) + else: + content = empty.copy() + CharsNotIn( + opener + closer + ParserElement.DEFAULT_WHITE_CHARS + ).set_parse_action(lambda t: t[0].strip()) + else: + if ignoreExpr is not None: + content = Combine( + OneOrMore( + ~ignoreExpr + + ~Literal(opener) + + ~Literal(closer) + + CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS, exact=1) + ) + ).set_parse_action(lambda t: t[0].strip()) + else: + content = Combine( + OneOrMore( + ~Literal(opener) + + ~Literal(closer) + + CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS, exact=1) + ) + ).set_parse_action(lambda t: t[0].strip()) + else: + raise ValueError( + "opening and closing arguments must be strings if no content expression is given" + ) + ret = Forward() + if ignoreExpr is not None: + ret <<= Group( + Suppress(opener) + ZeroOrMore(ignoreExpr | ret | content) + Suppress(closer) + ) + else: + ret <<= Group(Suppress(opener) + ZeroOrMore(ret | content) + Suppress(closer)) + ret.set_name("nested %s%s expression" % (opener, closer)) + return ret + + +def _makeTags(tagStr, xml, suppress_LT=Suppress("<"), suppress_GT=Suppress(">")): + """Internal helper to construct opening and closing tag expressions, given a tag name""" + if isinstance(tagStr, str_type): + resname = tagStr + tagStr = Keyword(tagStr, caseless=not xml) + else: + resname = tagStr.name + + tagAttrName = Word(alphas, alphanums + "_-:") + if xml: + tagAttrValue = dbl_quoted_string.copy().set_parse_action(remove_quotes) + openTag = ( + suppress_LT + + tagStr("tag") + + Dict(ZeroOrMore(Group(tagAttrName + Suppress("=") + tagAttrValue))) + + Opt("/", default=[False])("empty").set_parse_action( + lambda s, l, t: t[0] == "/" + ) + + suppress_GT + ) + else: + tagAttrValue = quoted_string.copy().set_parse_action(remove_quotes) | Word( + printables, exclude_chars=">" + ) + openTag = ( + suppress_LT + + tagStr("tag") + + Dict( + ZeroOrMore( + Group( + tagAttrName.set_parse_action(lambda t: t[0].lower()) + + Opt(Suppress("=") + tagAttrValue) + ) + ) + ) + + Opt("/", default=[False])("empty").set_parse_action( + lambda s, l, t: t[0] == "/" + ) + + suppress_GT + ) + closeTag = Combine(Literal("", adjacent=False) + + openTag.set_name("<%s>" % resname) + # add start results name in parse action now that ungrouped names are not reported at two levels + openTag.add_parse_action( + lambda t: t.__setitem__( + "start" + "".join(resname.replace(":", " ").title().split()), t.copy() + ) + ) + closeTag = closeTag( + "end" + "".join(resname.replace(":", " ").title().split()) + ).set_name("" % resname) + openTag.tag = resname + closeTag.tag = resname + openTag.tag_body = SkipTo(closeTag()) + return openTag, closeTag + + +def make_html_tags( + tag_str: Union[str, ParserElement] +) -> Tuple[ParserElement, ParserElement]: + """Helper to construct opening and closing tag expressions for HTML, + given a tag name. Matches tags in either upper or lower case, + attributes with namespaces and with quoted or unquoted values. + + Example:: + + text = 'More info at the pyparsing wiki page' + # make_html_tags returns pyparsing expressions for the opening and + # closing tags as a 2-tuple + a, a_end = make_html_tags("A") + link_expr = a + SkipTo(a_end)("link_text") + a_end + + for link in link_expr.search_string(text): + # attributes in the tag (like "href" shown here) are + # also accessible as named results + print(link.link_text, '->', link.href) + + prints:: + + pyparsing -> https://github.com/pyparsing/pyparsing/wiki + """ + return _makeTags(tag_str, False) + + +def make_xml_tags( + tag_str: Union[str, ParserElement] +) -> Tuple[ParserElement, ParserElement]: + """Helper to construct opening and closing tag expressions for XML, + given a tag name. Matches tags only in the given upper/lower case. + + Example: similar to :class:`make_html_tags` + """ + return _makeTags(tag_str, True) + + +any_open_tag, any_close_tag = make_html_tags( + Word(alphas, alphanums + "_:").set_name("any tag") +) + +_htmlEntityMap = {k.rstrip(";"): v for k, v in html.entities.html5.items()} +common_html_entity = Regex("&(?P" + "|".join(_htmlEntityMap) + ");").set_name( + "common HTML entity" +) + + +def replace_html_entity(t): + """Helper parser action to replace common HTML entities with their special characters""" + return _htmlEntityMap.get(t.entity) + + +class OpAssoc(Enum): + LEFT = 1 + RIGHT = 2 + + +InfixNotationOperatorArgType = Union[ + ParserElement, str, Tuple[Union[ParserElement, str], Union[ParserElement, str]] +] +InfixNotationOperatorSpec = Union[ + Tuple[ + InfixNotationOperatorArgType, + int, + OpAssoc, + OptionalType[ParseAction], + ], + Tuple[ + InfixNotationOperatorArgType, + int, + OpAssoc, + ], +] + + +def infix_notation( + base_expr: ParserElement, + op_list: List[InfixNotationOperatorSpec], + lpar: Union[str, ParserElement] = Suppress("("), + rpar: Union[str, ParserElement] = Suppress(")"), +) -> ParserElement: + """Helper method for constructing grammars of expressions made up of + operators working in a precedence hierarchy. Operators may be unary + or binary, left- or right-associative. Parse actions can also be + attached to operator expressions. The generated parser will also + recognize the use of parentheses to override operator precedences + (see example below). + + Note: if you define a deep operator list, you may see performance + issues when using infix_notation. See + :class:`ParserElement.enable_packrat` for a mechanism to potentially + improve your parser performance. + + Parameters: + - ``base_expr`` - expression representing the most basic operand to + be used in the expression + - ``op_list`` - list of tuples, one for each operator precedence level + in the expression grammar; each tuple is of the form ``(op_expr, + num_operands, right_left_assoc, (optional)parse_action)``, where: + + - ``op_expr`` is the pyparsing expression for the operator; may also + be a string, which will be converted to a Literal; if ``num_operands`` + is 3, ``op_expr`` is a tuple of two expressions, for the two + operators separating the 3 terms + - ``num_operands`` is the number of terms for this operator (must be 1, + 2, or 3) + - ``right_left_assoc`` is the indicator whether the operator is right + or left associative, using the pyparsing-defined constants + ``OpAssoc.RIGHT`` and ``OpAssoc.LEFT``. + - ``parse_action`` is the parse action to be associated with + expressions matching this operator expression (the parse action + tuple member may be omitted); if the parse action is passed + a tuple or list of functions, this is equivalent to calling + ``set_parse_action(*fn)`` + (:class:`ParserElement.set_parse_action`) + - ``lpar`` - expression for matching left-parentheses; if passed as a + str, then will be parsed as Suppress(lpar). If lpar is passed as + an expression (such as ``Literal('(')``), then it will be kept in + the parsed results, and grouped with them. (default= ``Suppress('(')``) + - ``rpar`` - expression for matching right-parentheses; if passed as a + str, then will be parsed as Suppress(rpar). If rpar is passed as + an expression (such as ``Literal(')')``), then it will be kept in + the parsed results, and grouped with them. (default= ``Suppress(')')``) + + Example:: + + # simple example of four-function arithmetic with ints and + # variable names + integer = pyparsing_common.signed_integer + varname = pyparsing_common.identifier + + arith_expr = infix_notation(integer | varname, + [ + ('-', 1, OpAssoc.RIGHT), + (one_of('* /'), 2, OpAssoc.LEFT), + (one_of('+ -'), 2, OpAssoc.LEFT), + ]) + + arith_expr.run_tests(''' + 5+3*6 + (5+3)*6 + -2--11 + ''', full_dump=False) + + prints:: + + 5+3*6 + [[5, '+', [3, '*', 6]]] + + (5+3)*6 + [[[5, '+', 3], '*', 6]] + + -2--11 + [[['-', 2], '-', ['-', 11]]] + """ + # captive version of FollowedBy that does not do parse actions or capture results names + class _FB(FollowedBy): + def parseImpl(self, instring, loc, doActions=True): + self.expr.try_parse(instring, loc) + return loc, [] + + _FB.__name__ = "FollowedBy>" + + ret = Forward() + if isinstance(lpar, str): + lpar = Suppress(lpar) + if isinstance(rpar, str): + rpar = Suppress(rpar) + + # if lpar and rpar are not suppressed, wrap in group + if not (isinstance(rpar, Suppress) and isinstance(rpar, Suppress)): + lastExpr = base_expr | Group(lpar + ret + rpar) + else: + lastExpr = base_expr | (lpar + ret + rpar) + + for i, operDef in enumerate(op_list): + opExpr, arity, rightLeftAssoc, pa = (operDef + (None,))[:4] + if isinstance(opExpr, str_type): + opExpr = ParserElement._literalStringClass(opExpr) + if arity == 3: + if not isinstance(opExpr, (tuple, list)) or len(opExpr) != 2: + raise ValueError( + "if numterms=3, opExpr must be a tuple or list of two expressions" + ) + opExpr1, opExpr2 = opExpr + term_name = "{}{} term".format(opExpr1, opExpr2) + else: + term_name = "{} term".format(opExpr) + + if not 1 <= arity <= 3: + raise ValueError("operator must be unary (1), binary (2), or ternary (3)") + + if rightLeftAssoc not in (OpAssoc.LEFT, OpAssoc.RIGHT): + raise ValueError("operator must indicate right or left associativity") + + thisExpr = Forward().set_name(term_name) + if rightLeftAssoc is OpAssoc.LEFT: + if arity == 1: + matchExpr = _FB(lastExpr + opExpr) + Group(lastExpr + opExpr[1, ...]) + elif arity == 2: + if opExpr is not None: + matchExpr = _FB(lastExpr + opExpr + lastExpr) + Group( + lastExpr + (opExpr + lastExpr)[1, ...] + ) + else: + matchExpr = _FB(lastExpr + lastExpr) + Group(lastExpr[2, ...]) + elif arity == 3: + matchExpr = _FB( + lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr + ) + Group(lastExpr + OneOrMore(opExpr1 + lastExpr + opExpr2 + lastExpr)) + elif rightLeftAssoc is OpAssoc.RIGHT: + if arity == 1: + # try to avoid LR with this extra test + if not isinstance(opExpr, Opt): + opExpr = Opt(opExpr) + matchExpr = _FB(opExpr.expr + thisExpr) + Group(opExpr + thisExpr) + elif arity == 2: + if opExpr is not None: + matchExpr = _FB(lastExpr + opExpr + thisExpr) + Group( + lastExpr + (opExpr + thisExpr)[1, ...] + ) + else: + matchExpr = _FB(lastExpr + thisExpr) + Group( + lastExpr + thisExpr[1, ...] + ) + elif arity == 3: + matchExpr = _FB( + lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr + ) + Group(lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr) + if pa: + if isinstance(pa, (tuple, list)): + matchExpr.set_parse_action(*pa) + else: + matchExpr.set_parse_action(pa) + thisExpr <<= (matchExpr | lastExpr).setName(term_name) + lastExpr = thisExpr + ret <<= lastExpr + return ret + + +def indentedBlock(blockStatementExpr, indentStack, indent=True, backup_stacks=[]): + """ + (DEPRECATED - use IndentedBlock class instead) + Helper method for defining space-delimited indentation blocks, + such as those used to define block statements in Python source code. + + Parameters: + + - ``blockStatementExpr`` - expression defining syntax of statement that + is repeated within the indented block + - ``indentStack`` - list created by caller to manage indentation stack + (multiple ``statementWithIndentedBlock`` expressions within a single + grammar should share a common ``indentStack``) + - ``indent`` - boolean indicating whether block must be indented beyond + the current level; set to ``False`` for block of left-most statements + (default= ``True``) + + A valid block must contain at least one ``blockStatement``. + + (Note that indentedBlock uses internal parse actions which make it + incompatible with packrat parsing.) + + Example:: + + data = ''' + def A(z): + A1 + B = 100 + G = A2 + A2 + A3 + B + def BB(a,b,c): + BB1 + def BBA(): + bba1 + bba2 + bba3 + C + D + def spam(x,y): + def eggs(z): + pass + ''' + + + indentStack = [1] + stmt = Forward() + + identifier = Word(alphas, alphanums) + funcDecl = ("def" + identifier + Group("(" + Opt(delimitedList(identifier)) + ")") + ":") + func_body = indentedBlock(stmt, indentStack) + funcDef = Group(funcDecl + func_body) + + rvalue = Forward() + funcCall = Group(identifier + "(" + Opt(delimitedList(rvalue)) + ")") + rvalue << (funcCall | identifier | Word(nums)) + assignment = Group(identifier + "=" + rvalue) + stmt << (funcDef | assignment | identifier) + + module_body = OneOrMore(stmt) + + parseTree = module_body.parseString(data) + parseTree.pprint() + + prints:: + + [['def', + 'A', + ['(', 'z', ')'], + ':', + [['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]], + 'B', + ['def', + 'BB', + ['(', 'a', 'b', 'c', ')'], + ':', + [['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]], + 'C', + 'D', + ['def', + 'spam', + ['(', 'x', 'y', ')'], + ':', + [[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]] + """ + backup_stacks.append(indentStack[:]) + + def reset_stack(): + indentStack[:] = backup_stacks[-1] + + def checkPeerIndent(s, l, t): + if l >= len(s): + return + curCol = col(l, s) + if curCol != indentStack[-1]: + if curCol > indentStack[-1]: + raise ParseException(s, l, "illegal nesting") + raise ParseException(s, l, "not a peer entry") + + def checkSubIndent(s, l, t): + curCol = col(l, s) + if curCol > indentStack[-1]: + indentStack.append(curCol) + else: + raise ParseException(s, l, "not a subentry") + + def checkUnindent(s, l, t): + if l >= len(s): + return + curCol = col(l, s) + if not (indentStack and curCol in indentStack): + raise ParseException(s, l, "not an unindent") + if curCol < indentStack[-1]: + indentStack.pop() + + NL = OneOrMore(LineEnd().set_whitespace_chars("\t ").suppress()) + INDENT = (Empty() + Empty().set_parse_action(checkSubIndent)).set_name("INDENT") + PEER = Empty().set_parse_action(checkPeerIndent).set_name("") + UNDENT = Empty().set_parse_action(checkUnindent).set_name("UNINDENT") + if indent: + smExpr = Group( + Opt(NL) + + INDENT + + OneOrMore(PEER + Group(blockStatementExpr) + Opt(NL)) + + UNDENT + ) + else: + smExpr = Group( + Opt(NL) + + OneOrMore(PEER + Group(blockStatementExpr) + Opt(NL)) + + Opt(UNDENT) + ) + + # add a parse action to remove backup_stack from list of backups + smExpr.add_parse_action( + lambda: backup_stacks.pop(-1) and None if backup_stacks else None + ) + smExpr.set_fail_action(lambda a, b, c, d: reset_stack()) + blockStatementExpr.ignore(_bslash + LineEnd()) + return smExpr.set_name("indented block") + + +# it's easy to get these comment structures wrong - they're very common, so may as well make them available +c_style_comment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + "*/").set_name( + "C style comment" +) +"Comment of the form ``/* ... */``" + +html_comment = Regex(r"").set_name("HTML comment") +"Comment of the form ````" + +rest_of_line = Regex(r".*").leave_whitespace().set_name("rest of line") +dbl_slash_comment = Regex(r"//(?:\\\n|[^\n])*").set_name("// comment") +"Comment of the form ``// ... (to end of line)``" + +cpp_style_comment = Combine( + Regex(r"/\*(?:[^*]|\*(?!/))*") + "*/" | dbl_slash_comment +).set_name("C++ style comment") +"Comment of either form :class:`c_style_comment` or :class:`dbl_slash_comment`" + +java_style_comment = cpp_style_comment +"Same as :class:`cpp_style_comment`" + +python_style_comment = Regex(r"#.*").set_name("Python style comment") +"Comment of the form ``# ... (to end of line)``" + + +# build list of built-in expressions, for future reference if a global default value +# gets updated +_builtin_exprs = [v for v in vars().values() if isinstance(v, ParserElement)] + + +# pre-PEP8 compatible names +delimitedList = delimited_list +countedArray = counted_array +matchPreviousLiteral = match_previous_literal +matchPreviousExpr = match_previous_expr +oneOf = one_of +dictOf = dict_of +originalTextFor = original_text_for +nestedExpr = nested_expr +makeHTMLTags = make_html_tags +makeXMLTags = make_xml_tags +anyOpenTag, anyCloseTag = any_open_tag, any_close_tag +commonHTMLEntity = common_html_entity +replaceHTMLEntity = replace_html_entity +opAssoc = OpAssoc +infixNotation = infix_notation +cStyleComment = c_style_comment +htmlComment = html_comment +restOfLine = rest_of_line +dblSlashComment = dbl_slash_comment +cppStyleComment = cpp_style_comment +javaStyleComment = java_style_comment +pythonStyleComment = python_style_comment diff --git a/setuptools/_vendor/pyparsing/py.typed b/setuptools/_vendor/pyparsing/py.typed new file mode 100644 index 0000000..e69de29 diff --git a/setuptools/_vendor/pyparsing/results.py b/setuptools/_vendor/pyparsing/results.py new file mode 100644 index 0000000..bb444df --- /dev/null +++ b/setuptools/_vendor/pyparsing/results.py @@ -0,0 +1,760 @@ +# results.py +from collections.abc import MutableMapping, Mapping, MutableSequence, Iterator +import pprint +from weakref import ref as wkref +from typing import Tuple, Any + +str_type: Tuple[type, ...] = (str, bytes) +_generator_type = type((_ for _ in ())) + + +class _ParseResultsWithOffset: + __slots__ = ["tup"] + + def __init__(self, p1, p2): + self.tup = (p1, p2) + + def __getitem__(self, i): + return self.tup[i] + + def __getstate__(self): + return self.tup + + def __setstate__(self, *args): + self.tup = args[0] + + +class ParseResults: + """Structured parse results, to provide multiple means of access to + the parsed data: + + - as a list (``len(results)``) + - by list index (``results[0], results[1]``, etc.) + - by attribute (``results.`` - see :class:`ParserElement.set_results_name`) + + Example:: + + integer = Word(nums) + date_str = (integer.set_results_name("year") + '/' + + integer.set_results_name("month") + '/' + + integer.set_results_name("day")) + # equivalent form: + # date_str = (integer("year") + '/' + # + integer("month") + '/' + # + integer("day")) + + # parse_string returns a ParseResults object + result = date_str.parse_string("1999/12/31") + + def test(s, fn=repr): + print("{} -> {}".format(s, fn(eval(s)))) + test("list(result)") + test("result[0]") + test("result['month']") + test("result.day") + test("'month' in result") + test("'minutes' in result") + test("result.dump()", str) + + prints:: + + list(result) -> ['1999', '/', '12', '/', '31'] + result[0] -> '1999' + result['month'] -> '12' + result.day -> '31' + 'month' in result -> True + 'minutes' in result -> False + result.dump() -> ['1999', '/', '12', '/', '31'] + - day: '31' + - month: '12' + - year: '1999' + """ + + _null_values: Tuple[Any, ...] = (None, [], "", ()) + + __slots__ = [ + "_name", + "_parent", + "_all_names", + "_modal", + "_toklist", + "_tokdict", + "__weakref__", + ] + + class List(list): + """ + Simple wrapper class to distinguish parsed list results that should be preserved + as actual Python lists, instead of being converted to :class:`ParseResults`: + + LBRACK, RBRACK = map(pp.Suppress, "[]") + element = pp.Forward() + item = ppc.integer + element_list = LBRACK + pp.delimited_list(element) + RBRACK + + # add parse actions to convert from ParseResults to actual Python collection types + def as_python_list(t): + return pp.ParseResults.List(t.as_list()) + element_list.add_parse_action(as_python_list) + + element <<= item | element_list + + element.run_tests(''' + 100 + [2,3,4] + [[2, 1],3,4] + [(2, 1),3,4] + (2,3,4) + ''', post_parse=lambda s, r: (r[0], type(r[0]))) + + prints: + + 100 + (100, ) + + [2,3,4] + ([2, 3, 4], ) + + [[2, 1],3,4] + ([[2, 1], 3, 4], ) + + (Used internally by :class:`Group` when `aslist=True`.) + """ + + def __new__(cls, contained=None): + if contained is None: + contained = [] + + if not isinstance(contained, list): + raise TypeError( + "{} may only be constructed with a list," + " not {}".format(cls.__name__, type(contained).__name__) + ) + + return list.__new__(cls) + + def __new__(cls, toklist=None, name=None, **kwargs): + if isinstance(toklist, ParseResults): + return toklist + self = object.__new__(cls) + self._name = None + self._parent = None + self._all_names = set() + + if toklist is None: + self._toklist = [] + elif isinstance(toklist, (list, _generator_type)): + self._toklist = ( + [toklist[:]] + if isinstance(toklist, ParseResults.List) + else list(toklist) + ) + else: + self._toklist = [toklist] + self._tokdict = dict() + return self + + # Performance tuning: we construct a *lot* of these, so keep this + # constructor as small and fast as possible + def __init__( + self, toklist=None, name=None, asList=True, modal=True, isinstance=isinstance + ): + self._modal = modal + if name is not None and name != "": + if isinstance(name, int): + name = str(name) + if not modal: + self._all_names = {name} + self._name = name + if toklist not in self._null_values: + if isinstance(toklist, (str_type, type)): + toklist = [toklist] + if asList: + if isinstance(toklist, ParseResults): + self[name] = _ParseResultsWithOffset( + ParseResults(toklist._toklist), 0 + ) + else: + self[name] = _ParseResultsWithOffset( + ParseResults(toklist[0]), 0 + ) + self[name]._name = name + else: + try: + self[name] = toklist[0] + except (KeyError, TypeError, IndexError): + if toklist is not self: + self[name] = toklist + else: + self._name = name + + def __getitem__(self, i): + if isinstance(i, (int, slice)): + return self._toklist[i] + else: + if i not in self._all_names: + return self._tokdict[i][-1][0] + else: + return ParseResults([v[0] for v in self._tokdict[i]]) + + def __setitem__(self, k, v, isinstance=isinstance): + if isinstance(v, _ParseResultsWithOffset): + self._tokdict[k] = self._tokdict.get(k, list()) + [v] + sub = v[0] + elif isinstance(k, (int, slice)): + self._toklist[k] = v + sub = v + else: + self._tokdict[k] = self._tokdict.get(k, list()) + [ + _ParseResultsWithOffset(v, 0) + ] + sub = v + if isinstance(sub, ParseResults): + sub._parent = wkref(self) + + def __delitem__(self, i): + if isinstance(i, (int, slice)): + mylen = len(self._toklist) + del self._toklist[i] + + # convert int to slice + if isinstance(i, int): + if i < 0: + i += mylen + i = slice(i, i + 1) + # get removed indices + removed = list(range(*i.indices(mylen))) + removed.reverse() + # fixup indices in token dictionary + for name, occurrences in self._tokdict.items(): + for j in removed: + for k, (value, position) in enumerate(occurrences): + occurrences[k] = _ParseResultsWithOffset( + value, position - (position > j) + ) + else: + del self._tokdict[i] + + def __contains__(self, k) -> bool: + return k in self._tokdict + + def __len__(self) -> int: + return len(self._toklist) + + def __bool__(self) -> bool: + return not not (self._toklist or self._tokdict) + + def __iter__(self) -> Iterator: + return iter(self._toklist) + + def __reversed__(self) -> Iterator: + return iter(self._toklist[::-1]) + + def keys(self): + return iter(self._tokdict) + + def values(self): + return (self[k] for k in self.keys()) + + def items(self): + return ((k, self[k]) for k in self.keys()) + + def haskeys(self) -> bool: + """ + Since ``keys()`` returns an iterator, this method is helpful in bypassing + code that looks for the existence of any defined results names.""" + return bool(self._tokdict) + + def pop(self, *args, **kwargs): + """ + Removes and returns item at specified index (default= ``last``). + Supports both ``list`` and ``dict`` semantics for ``pop()``. If + passed no argument or an integer argument, it will use ``list`` + semantics and pop tokens from the list of parsed tokens. If passed + a non-integer argument (most likely a string), it will use ``dict`` + semantics and pop the corresponding value from any defined results + names. A second default return value argument is supported, just as in + ``dict.pop()``. + + Example:: + + numlist = Word(nums)[...] + print(numlist.parse_string("0 123 321")) # -> ['0', '123', '321'] + + def remove_first(tokens): + tokens.pop(0) + numlist.add_parse_action(remove_first) + print(numlist.parse_string("0 123 321")) # -> ['123', '321'] + + label = Word(alphas) + patt = label("LABEL") + OneOrMore(Word(nums)) + print(patt.parse_string("AAB 123 321").dump()) + + # Use pop() in a parse action to remove named result (note that corresponding value is not + # removed from list form of results) + def remove_LABEL(tokens): + tokens.pop("LABEL") + return tokens + patt.add_parse_action(remove_LABEL) + print(patt.parse_string("AAB 123 321").dump()) + + prints:: + + ['AAB', '123', '321'] + - LABEL: 'AAB' + + ['AAB', '123', '321'] + """ + if not args: + args = [-1] + for k, v in kwargs.items(): + if k == "default": + args = (args[0], v) + else: + raise TypeError( + "pop() got an unexpected keyword argument {!r}".format(k) + ) + if isinstance(args[0], int) or len(args) == 1 or args[0] in self: + index = args[0] + ret = self[index] + del self[index] + return ret + else: + defaultvalue = args[1] + return defaultvalue + + def get(self, key, default_value=None): + """ + Returns named result matching the given key, or if there is no + such name, then returns the given ``default_value`` or ``None`` if no + ``default_value`` is specified. + + Similar to ``dict.get()``. + + Example:: + + integer = Word(nums) + date_str = integer("year") + '/' + integer("month") + '/' + integer("day") + + result = date_str.parse_string("1999/12/31") + print(result.get("year")) # -> '1999' + print(result.get("hour", "not specified")) # -> 'not specified' + print(result.get("hour")) # -> None + """ + if key in self: + return self[key] + else: + return default_value + + def insert(self, index, ins_string): + """ + Inserts new element at location index in the list of parsed tokens. + + Similar to ``list.insert()``. + + Example:: + + numlist = Word(nums)[...] + print(numlist.parse_string("0 123 321")) # -> ['0', '123', '321'] + + # use a parse action to insert the parse location in the front of the parsed results + def insert_locn(locn, tokens): + tokens.insert(0, locn) + numlist.add_parse_action(insert_locn) + print(numlist.parse_string("0 123 321")) # -> [0, '0', '123', '321'] + """ + self._toklist.insert(index, ins_string) + # fixup indices in token dictionary + for name, occurrences in self._tokdict.items(): + for k, (value, position) in enumerate(occurrences): + occurrences[k] = _ParseResultsWithOffset( + value, position + (position > index) + ) + + def append(self, item): + """ + Add single element to end of ``ParseResults`` list of elements. + + Example:: + + numlist = Word(nums)[...] + print(numlist.parse_string("0 123 321")) # -> ['0', '123', '321'] + + # use a parse action to compute the sum of the parsed integers, and add it to the end + def append_sum(tokens): + tokens.append(sum(map(int, tokens))) + numlist.add_parse_action(append_sum) + print(numlist.parse_string("0 123 321")) # -> ['0', '123', '321', 444] + """ + self._toklist.append(item) + + def extend(self, itemseq): + """ + Add sequence of elements to end of ``ParseResults`` list of elements. + + Example:: + + patt = OneOrMore(Word(alphas)) + + # use a parse action to append the reverse of the matched strings, to make a palindrome + def make_palindrome(tokens): + tokens.extend(reversed([t[::-1] for t in tokens])) + return ''.join(tokens) + patt.add_parse_action(make_palindrome) + print(patt.parse_string("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl' + """ + if isinstance(itemseq, ParseResults): + self.__iadd__(itemseq) + else: + self._toklist.extend(itemseq) + + def clear(self): + """ + Clear all elements and results names. + """ + del self._toklist[:] + self._tokdict.clear() + + def __getattr__(self, name): + try: + return self[name] + except KeyError: + if name.startswith("__"): + raise AttributeError(name) + return "" + + def __add__(self, other) -> "ParseResults": + ret = self.copy() + ret += other + return ret + + def __iadd__(self, other) -> "ParseResults": + if other._tokdict: + offset = len(self._toklist) + addoffset = lambda a: offset if a < 0 else a + offset + otheritems = other._tokdict.items() + otherdictitems = [ + (k, _ParseResultsWithOffset(v[0], addoffset(v[1]))) + for k, vlist in otheritems + for v in vlist + ] + for k, v in otherdictitems: + self[k] = v + if isinstance(v[0], ParseResults): + v[0]._parent = wkref(self) + + self._toklist += other._toklist + self._all_names |= other._all_names + return self + + def __radd__(self, other) -> "ParseResults": + if isinstance(other, int) and other == 0: + # useful for merging many ParseResults using sum() builtin + return self.copy() + else: + # this may raise a TypeError - so be it + return other + self + + def __repr__(self) -> str: + return "{}({!r}, {})".format(type(self).__name__, self._toklist, self.as_dict()) + + def __str__(self) -> str: + return ( + "[" + + ", ".join( + [ + str(i) if isinstance(i, ParseResults) else repr(i) + for i in self._toklist + ] + ) + + "]" + ) + + def _asStringList(self, sep=""): + out = [] + for item in self._toklist: + if out and sep: + out.append(sep) + if isinstance(item, ParseResults): + out += item._asStringList() + else: + out.append(str(item)) + return out + + def as_list(self) -> list: + """ + Returns the parse results as a nested list of matching tokens, all converted to strings. + + Example:: + + patt = OneOrMore(Word(alphas)) + result = patt.parse_string("sldkj lsdkj sldkj") + # even though the result prints in string-like form, it is actually a pyparsing ParseResults + print(type(result), result) # -> ['sldkj', 'lsdkj', 'sldkj'] + + # Use as_list() to create an actual list + result_list = result.as_list() + print(type(result_list), result_list) # -> ['sldkj', 'lsdkj', 'sldkj'] + """ + return [ + res.as_list() if isinstance(res, ParseResults) else res + for res in self._toklist + ] + + def as_dict(self) -> dict: + """ + Returns the named parse results as a nested dictionary. + + Example:: + + integer = Word(nums) + date_str = integer("year") + '/' + integer("month") + '/' + integer("day") + + result = date_str.parse_string('12/31/1999') + print(type(result), repr(result)) # -> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]}) + + result_dict = result.as_dict() + print(type(result_dict), repr(result_dict)) # -> {'day': '1999', 'year': '12', 'month': '31'} + + # even though a ParseResults supports dict-like access, sometime you just need to have a dict + import json + print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable + print(json.dumps(result.as_dict())) # -> {"month": "31", "day": "1999", "year": "12"} + """ + + def to_item(obj): + if isinstance(obj, ParseResults): + return obj.as_dict() if obj.haskeys() else [to_item(v) for v in obj] + else: + return obj + + return dict((k, to_item(v)) for k, v in self.items()) + + def copy(self) -> "ParseResults": + """ + Returns a new copy of a :class:`ParseResults` object. + """ + ret = ParseResults(self._toklist) + ret._tokdict = self._tokdict.copy() + ret._parent = self._parent + ret._all_names |= self._all_names + ret._name = self._name + return ret + + def get_name(self): + r""" + Returns the results name for this token expression. Useful when several + different expressions might match at a particular location. + + Example:: + + integer = Word(nums) + ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d") + house_number_expr = Suppress('#') + Word(nums, alphanums) + user_data = (Group(house_number_expr)("house_number") + | Group(ssn_expr)("ssn") + | Group(integer)("age")) + user_info = OneOrMore(user_data) + + result = user_info.parse_string("22 111-22-3333 #221B") + for item in result: + print(item.get_name(), ':', item[0]) + + prints:: + + age : 22 + ssn : 111-22-3333 + house_number : 221B + """ + if self._name: + return self._name + elif self._parent: + par = self._parent() + + def find_in_parent(sub): + return next( + ( + k + for k, vlist in par._tokdict.items() + for v, loc in vlist + if sub is v + ), + None, + ) + + return find_in_parent(self) if par else None + elif ( + len(self) == 1 + and len(self._tokdict) == 1 + and next(iter(self._tokdict.values()))[0][1] in (0, -1) + ): + return next(iter(self._tokdict.keys())) + else: + return None + + def dump(self, indent="", full=True, include_list=True, _depth=0) -> str: + """ + Diagnostic method for listing out the contents of + a :class:`ParseResults`. Accepts an optional ``indent`` argument so + that this string can be embedded in a nested display of other data. + + Example:: + + integer = Word(nums) + date_str = integer("year") + '/' + integer("month") + '/' + integer("day") + + result = date_str.parse_string('1999/12/31') + print(result.dump()) + + prints:: + + ['1999', '/', '12', '/', '31'] + - day: '31' + - month: '12' + - year: '1999' + """ + out = [] + NL = "\n" + out.append(indent + str(self.as_list()) if include_list else "") + + if full: + if self.haskeys(): + items = sorted((str(k), v) for k, v in self.items()) + for k, v in items: + if out: + out.append(NL) + out.append("{}{}- {}: ".format(indent, (" " * _depth), k)) + if isinstance(v, ParseResults): + if v: + out.append( + v.dump( + indent=indent, + full=full, + include_list=include_list, + _depth=_depth + 1, + ) + ) + else: + out.append(str(v)) + else: + out.append(repr(v)) + if any(isinstance(vv, ParseResults) for vv in self): + v = self + for i, vv in enumerate(v): + if isinstance(vv, ParseResults): + out.append( + "\n{}{}[{}]:\n{}{}{}".format( + indent, + (" " * (_depth)), + i, + indent, + (" " * (_depth + 1)), + vv.dump( + indent=indent, + full=full, + include_list=include_list, + _depth=_depth + 1, + ), + ) + ) + else: + out.append( + "\n%s%s[%d]:\n%s%s%s" + % ( + indent, + (" " * (_depth)), + i, + indent, + (" " * (_depth + 1)), + str(vv), + ) + ) + + return "".join(out) + + def pprint(self, *args, **kwargs): + """ + Pretty-printer for parsed results as a list, using the + `pprint `_ module. + Accepts additional positional or keyword args as defined for + `pprint.pprint `_ . + + Example:: + + ident = Word(alphas, alphanums) + num = Word(nums) + func = Forward() + term = ident | num | Group('(' + func + ')') + func <<= ident + Group(Optional(delimited_list(term))) + result = func.parse_string("fna a,b,(fnb c,d,200),100") + result.pprint(width=40) + + prints:: + + ['fna', + ['a', + 'b', + ['(', 'fnb', ['c', 'd', '200'], ')'], + '100']] + """ + pprint.pprint(self.as_list(), *args, **kwargs) + + # add support for pickle protocol + def __getstate__(self): + return ( + self._toklist, + ( + self._tokdict.copy(), + self._parent is not None and self._parent() or None, + self._all_names, + self._name, + ), + ) + + def __setstate__(self, state): + self._toklist, (self._tokdict, par, inAccumNames, self._name) = state + self._all_names = set(inAccumNames) + if par is not None: + self._parent = wkref(par) + else: + self._parent = None + + def __getnewargs__(self): + return self._toklist, self._name + + def __dir__(self): + return dir(type(self)) + list(self.keys()) + + @classmethod + def from_dict(cls, other, name=None) -> "ParseResults": + """ + Helper classmethod to construct a ``ParseResults`` from a ``dict``, preserving the + name-value relations as results names. If an optional ``name`` argument is + given, a nested ``ParseResults`` will be returned. + """ + + def is_iterable(obj): + try: + iter(obj) + except Exception: + return False + else: + return not isinstance(obj, str_type) + + ret = cls([]) + for k, v in other.items(): + if isinstance(v, Mapping): + ret += cls.from_dict(v, name=k) + else: + ret += cls([v], name=k, asList=is_iterable(v)) + if name is not None: + ret = cls([ret], name=name) + return ret + + asList = as_list + asDict = as_dict + getName = get_name + + +MutableMapping.register(ParseResults) +MutableSequence.register(ParseResults) diff --git a/setuptools/_vendor/pyparsing/testing.py b/setuptools/_vendor/pyparsing/testing.py new file mode 100644 index 0000000..991972f --- /dev/null +++ b/setuptools/_vendor/pyparsing/testing.py @@ -0,0 +1,331 @@ +# testing.py + +from contextlib import contextmanager +from typing import Optional + +from .core import ( + ParserElement, + ParseException, + Keyword, + __diag__, + __compat__, +) + + +class pyparsing_test: + """ + namespace class for classes useful in writing unit tests + """ + + class reset_pyparsing_context: + """ + Context manager to be used when writing unit tests that modify pyparsing config values: + - packrat parsing + - bounded recursion parsing + - default whitespace characters. + - default keyword characters + - literal string auto-conversion class + - __diag__ settings + + Example:: + + with reset_pyparsing_context(): + # test that literals used to construct a grammar are automatically suppressed + ParserElement.inlineLiteralsUsing(Suppress) + + term = Word(alphas) | Word(nums) + group = Group('(' + term[...] + ')') + + # assert that the '()' characters are not included in the parsed tokens + self.assertParseAndCheckList(group, "(abc 123 def)", ['abc', '123', 'def']) + + # after exiting context manager, literals are converted to Literal expressions again + """ + + def __init__(self): + self._save_context = {} + + def save(self): + self._save_context["default_whitespace"] = ParserElement.DEFAULT_WHITE_CHARS + self._save_context["default_keyword_chars"] = Keyword.DEFAULT_KEYWORD_CHARS + + self._save_context[ + "literal_string_class" + ] = ParserElement._literalStringClass + + self._save_context["verbose_stacktrace"] = ParserElement.verbose_stacktrace + + self._save_context["packrat_enabled"] = ParserElement._packratEnabled + if ParserElement._packratEnabled: + self._save_context[ + "packrat_cache_size" + ] = ParserElement.packrat_cache.size + else: + self._save_context["packrat_cache_size"] = None + self._save_context["packrat_parse"] = ParserElement._parse + self._save_context[ + "recursion_enabled" + ] = ParserElement._left_recursion_enabled + + self._save_context["__diag__"] = { + name: getattr(__diag__, name) for name in __diag__._all_names + } + + self._save_context["__compat__"] = { + "collect_all_And_tokens": __compat__.collect_all_And_tokens + } + + return self + + def restore(self): + # reset pyparsing global state + if ( + ParserElement.DEFAULT_WHITE_CHARS + != self._save_context["default_whitespace"] + ): + ParserElement.set_default_whitespace_chars( + self._save_context["default_whitespace"] + ) + + ParserElement.verbose_stacktrace = self._save_context["verbose_stacktrace"] + + Keyword.DEFAULT_KEYWORD_CHARS = self._save_context["default_keyword_chars"] + ParserElement.inlineLiteralsUsing( + self._save_context["literal_string_class"] + ) + + for name, value in self._save_context["__diag__"].items(): + (__diag__.enable if value else __diag__.disable)(name) + + ParserElement._packratEnabled = False + if self._save_context["packrat_enabled"]: + ParserElement.enable_packrat(self._save_context["packrat_cache_size"]) + else: + ParserElement._parse = self._save_context["packrat_parse"] + ParserElement._left_recursion_enabled = self._save_context[ + "recursion_enabled" + ] + + __compat__.collect_all_And_tokens = self._save_context["__compat__"] + + return self + + def copy(self): + ret = type(self)() + ret._save_context.update(self._save_context) + return ret + + def __enter__(self): + return self.save() + + def __exit__(self, *args): + self.restore() + + class TestParseResultsAsserts: + """ + A mixin class to add parse results assertion methods to normal unittest.TestCase classes. + """ + + def assertParseResultsEquals( + self, result, expected_list=None, expected_dict=None, msg=None + ): + """ + Unit test assertion to compare a :class:`ParseResults` object with an optional ``expected_list``, + and compare any defined results names with an optional ``expected_dict``. + """ + if expected_list is not None: + self.assertEqual(expected_list, result.as_list(), msg=msg) + if expected_dict is not None: + self.assertEqual(expected_dict, result.as_dict(), msg=msg) + + def assertParseAndCheckList( + self, expr, test_string, expected_list, msg=None, verbose=True + ): + """ + Convenience wrapper assert to test a parser element and input string, and assert that + the resulting ``ParseResults.asList()`` is equal to the ``expected_list``. + """ + result = expr.parse_string(test_string, parse_all=True) + if verbose: + print(result.dump()) + else: + print(result.as_list()) + self.assertParseResultsEquals(result, expected_list=expected_list, msg=msg) + + def assertParseAndCheckDict( + self, expr, test_string, expected_dict, msg=None, verbose=True + ): + """ + Convenience wrapper assert to test a parser element and input string, and assert that + the resulting ``ParseResults.asDict()`` is equal to the ``expected_dict``. + """ + result = expr.parse_string(test_string, parseAll=True) + if verbose: + print(result.dump()) + else: + print(result.as_list()) + self.assertParseResultsEquals(result, expected_dict=expected_dict, msg=msg) + + def assertRunTestResults( + self, run_tests_report, expected_parse_results=None, msg=None + ): + """ + Unit test assertion to evaluate output of ``ParserElement.runTests()``. If a list of + list-dict tuples is given as the ``expected_parse_results`` argument, then these are zipped + with the report tuples returned by ``runTests`` and evaluated using ``assertParseResultsEquals``. + Finally, asserts that the overall ``runTests()`` success value is ``True``. + + :param run_tests_report: tuple(bool, [tuple(str, ParseResults or Exception)]) returned from runTests + :param expected_parse_results (optional): [tuple(str, list, dict, Exception)] + """ + run_test_success, run_test_results = run_tests_report + + if expected_parse_results is not None: + merged = [ + (*rpt, expected) + for rpt, expected in zip(run_test_results, expected_parse_results) + ] + for test_string, result, expected in merged: + # expected should be a tuple containing a list and/or a dict or an exception, + # and optional failure message string + # an empty tuple will skip any result validation + fail_msg = next( + (exp for exp in expected if isinstance(exp, str)), None + ) + expected_exception = next( + ( + exp + for exp in expected + if isinstance(exp, type) and issubclass(exp, Exception) + ), + None, + ) + if expected_exception is not None: + with self.assertRaises( + expected_exception=expected_exception, msg=fail_msg or msg + ): + if isinstance(result, Exception): + raise result + else: + expected_list = next( + (exp for exp in expected if isinstance(exp, list)), None + ) + expected_dict = next( + (exp for exp in expected if isinstance(exp, dict)), None + ) + if (expected_list, expected_dict) != (None, None): + self.assertParseResultsEquals( + result, + expected_list=expected_list, + expected_dict=expected_dict, + msg=fail_msg or msg, + ) + else: + # warning here maybe? + print("no validation for {!r}".format(test_string)) + + # do this last, in case some specific test results can be reported instead + self.assertTrue( + run_test_success, msg=msg if msg is not None else "failed runTests" + ) + + @contextmanager + def assertRaisesParseException(self, exc_type=ParseException, msg=None): + with self.assertRaises(exc_type, msg=msg): + yield + + @staticmethod + def with_line_numbers( + s: str, + start_line: Optional[int] = None, + end_line: Optional[int] = None, + expand_tabs: bool = True, + eol_mark: str = "|", + mark_spaces: Optional[str] = None, + mark_control: Optional[str] = None, + ) -> str: + """ + Helpful method for debugging a parser - prints a string with line and column numbers. + (Line and column numbers are 1-based.) + + :param s: tuple(bool, str - string to be printed with line and column numbers + :param start_line: int - (optional) starting line number in s to print (default=1) + :param end_line: int - (optional) ending line number in s to print (default=len(s)) + :param expand_tabs: bool - (optional) expand tabs to spaces, to match the pyparsing default + :param eol_mark: str - (optional) string to mark the end of lines, helps visualize trailing spaces (default="|") + :param mark_spaces: str - (optional) special character to display in place of spaces + :param mark_control: str - (optional) convert non-printing control characters to a placeholding + character; valid values: + - "unicode" - replaces control chars with Unicode symbols, such as "␍" and "␊" + - any single character string - replace control characters with given string + - None (default) - string is displayed as-is + + :return: str - input string with leading line numbers and column number headers + """ + if expand_tabs: + s = s.expandtabs() + if mark_control is not None: + if mark_control == "unicode": + tbl = str.maketrans( + {c: u for c, u in zip(range(0, 33), range(0x2400, 0x2433))} + | {127: 0x2421} + ) + eol_mark = "" + else: + tbl = str.maketrans( + {c: mark_control for c in list(range(0, 32)) + [127]} + ) + s = s.translate(tbl) + if mark_spaces is not None and mark_spaces != " ": + if mark_spaces == "unicode": + tbl = str.maketrans({9: 0x2409, 32: 0x2423}) + s = s.translate(tbl) + else: + s = s.replace(" ", mark_spaces) + if start_line is None: + start_line = 1 + if end_line is None: + end_line = len(s) + end_line = min(end_line, len(s)) + start_line = min(max(1, start_line), end_line) + + if mark_control != "unicode": + s_lines = s.splitlines()[start_line - 1 : end_line] + else: + s_lines = [line + "␊" for line in s.split("␊")[start_line - 1 : end_line]] + if not s_lines: + return "" + + lineno_width = len(str(end_line)) + max_line_len = max(len(line) for line in s_lines) + lead = " " * (lineno_width + 1) + if max_line_len >= 99: + header0 = ( + lead + + "".join( + "{}{}".format(" " * 99, (i + 1) % 100) + for i in range(max(max_line_len // 100, 1)) + ) + + "\n" + ) + else: + header0 = "" + header1 = ( + header0 + + lead + + "".join( + " {}".format((i + 1) % 10) + for i in range(-(-max_line_len // 10)) + ) + + "\n" + ) + header2 = lead + "1234567890" * (-(-max_line_len // 10)) + "\n" + return ( + header1 + + header2 + + "\n".join( + "{:{}d}:{}{}".format(i, lineno_width, line, eol_mark) + for i, line in enumerate(s_lines, start=start_line) + ) + + "\n" + ) diff --git a/setuptools/_vendor/pyparsing/unicode.py b/setuptools/_vendor/pyparsing/unicode.py new file mode 100644 index 0000000..9226148 --- /dev/null +++ b/setuptools/_vendor/pyparsing/unicode.py @@ -0,0 +1,332 @@ +# unicode.py + +import sys +from itertools import filterfalse +from typing import List, Tuple, Union + + +class _lazyclassproperty: + def __init__(self, fn): + self.fn = fn + self.__doc__ = fn.__doc__ + self.__name__ = fn.__name__ + + def __get__(self, obj, cls): + if cls is None: + cls = type(obj) + if not hasattr(cls, "_intern") or any( + cls._intern is getattr(superclass, "_intern", []) + for superclass in cls.__mro__[1:] + ): + cls._intern = {} + attrname = self.fn.__name__ + if attrname not in cls._intern: + cls._intern[attrname] = self.fn(cls) + return cls._intern[attrname] + + +UnicodeRangeList = List[Union[Tuple[int, int], Tuple[int]]] + + +class unicode_set: + """ + A set of Unicode characters, for language-specific strings for + ``alphas``, ``nums``, ``alphanums``, and ``printables``. + A unicode_set is defined by a list of ranges in the Unicode character + set, in a class attribute ``_ranges``. Ranges can be specified using + 2-tuples or a 1-tuple, such as:: + + _ranges = [ + (0x0020, 0x007e), + (0x00a0, 0x00ff), + (0x0100,), + ] + + Ranges are left- and right-inclusive. A 1-tuple of (x,) is treated as (x, x). + + A unicode set can also be defined using multiple inheritance of other unicode sets:: + + class CJK(Chinese, Japanese, Korean): + pass + """ + + _ranges: UnicodeRangeList = [] + + @_lazyclassproperty + def _chars_for_ranges(cls): + ret = [] + for cc in cls.__mro__: + if cc is unicode_set: + break + for rr in getattr(cc, "_ranges", ()): + ret.extend(range(rr[0], rr[-1] + 1)) + return [chr(c) for c in sorted(set(ret))] + + @_lazyclassproperty + def printables(cls): + "all non-whitespace characters in this range" + return "".join(filterfalse(str.isspace, cls._chars_for_ranges)) + + @_lazyclassproperty + def alphas(cls): + "all alphabetic characters in this range" + return "".join(filter(str.isalpha, cls._chars_for_ranges)) + + @_lazyclassproperty + def nums(cls): + "all numeric digit characters in this range" + return "".join(filter(str.isdigit, cls._chars_for_ranges)) + + @_lazyclassproperty + def alphanums(cls): + "all alphanumeric characters in this range" + return cls.alphas + cls.nums + + @_lazyclassproperty + def identchars(cls): + "all characters in this range that are valid identifier characters, plus underscore '_'" + return "".join( + sorted( + set( + "".join(filter(str.isidentifier, cls._chars_for_ranges)) + + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzªµº" + + "ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ" + + "_" + ) + ) + ) + + @_lazyclassproperty + def identbodychars(cls): + """ + all characters in this range that are valid identifier body characters, + plus the digits 0-9 + """ + return "".join( + sorted( + set( + cls.identchars + + "0123456789" + + "".join( + [c for c in cls._chars_for_ranges if ("_" + c).isidentifier()] + ) + ) + ) + ) + + +class pyparsing_unicode(unicode_set): + """ + A namespace class for defining common language unicode_sets. + """ + + _ranges: UnicodeRangeList = [(32, sys.maxunicode)] + + class Latin1(unicode_set): + "Unicode set for Latin-1 Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x0020, 0x007E), + (0x00A0, 0x00FF), + ] + + class LatinA(unicode_set): + "Unicode set for Latin-A Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x0100, 0x017F), + ] + + class LatinB(unicode_set): + "Unicode set for Latin-B Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x0180, 0x024F), + ] + + class Greek(unicode_set): + "Unicode set for Greek Unicode Character Ranges" + _ranges: UnicodeRangeList = [ + (0x0342, 0x0345), + (0x0370, 0x0377), + (0x037A, 0x037F), + (0x0384, 0x038A), + (0x038C,), + (0x038E, 0x03A1), + (0x03A3, 0x03E1), + (0x03F0, 0x03FF), + (0x1D26, 0x1D2A), + (0x1D5E,), + (0x1D60,), + (0x1D66, 0x1D6A), + (0x1F00, 0x1F15), + (0x1F18, 0x1F1D), + (0x1F20, 0x1F45), + (0x1F48, 0x1F4D), + (0x1F50, 0x1F57), + (0x1F59,), + (0x1F5B,), + (0x1F5D,), + (0x1F5F, 0x1F7D), + (0x1F80, 0x1FB4), + (0x1FB6, 0x1FC4), + (0x1FC6, 0x1FD3), + (0x1FD6, 0x1FDB), + (0x1FDD, 0x1FEF), + (0x1FF2, 0x1FF4), + (0x1FF6, 0x1FFE), + (0x2129,), + (0x2719, 0x271A), + (0xAB65,), + (0x10140, 0x1018D), + (0x101A0,), + (0x1D200, 0x1D245), + (0x1F7A1, 0x1F7A7), + ] + + class Cyrillic(unicode_set): + "Unicode set for Cyrillic Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x0400, 0x052F), + (0x1C80, 0x1C88), + (0x1D2B,), + (0x1D78,), + (0x2DE0, 0x2DFF), + (0xA640, 0xA672), + (0xA674, 0xA69F), + (0xFE2E, 0xFE2F), + ] + + class Chinese(unicode_set): + "Unicode set for Chinese Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x2E80, 0x2E99), + (0x2E9B, 0x2EF3), + (0x31C0, 0x31E3), + (0x3400, 0x4DB5), + (0x4E00, 0x9FEF), + (0xA700, 0xA707), + (0xF900, 0xFA6D), + (0xFA70, 0xFAD9), + (0x16FE2, 0x16FE3), + (0x1F210, 0x1F212), + (0x1F214, 0x1F23B), + (0x1F240, 0x1F248), + (0x20000, 0x2A6D6), + (0x2A700, 0x2B734), + (0x2B740, 0x2B81D), + (0x2B820, 0x2CEA1), + (0x2CEB0, 0x2EBE0), + (0x2F800, 0x2FA1D), + ] + + class Japanese(unicode_set): + "Unicode set for Japanese Unicode Character Range, combining Kanji, Hiragana, and Katakana ranges" + _ranges: UnicodeRangeList = [] + + class Kanji(unicode_set): + "Unicode set for Kanji Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x4E00, 0x9FBF), + (0x3000, 0x303F), + ] + + class Hiragana(unicode_set): + "Unicode set for Hiragana Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x3041, 0x3096), + (0x3099, 0x30A0), + (0x30FC,), + (0xFF70,), + (0x1B001,), + (0x1B150, 0x1B152), + (0x1F200,), + ] + + class Katakana(unicode_set): + "Unicode set for Katakana Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x3099, 0x309C), + (0x30A0, 0x30FF), + (0x31F0, 0x31FF), + (0x32D0, 0x32FE), + (0xFF65, 0xFF9F), + (0x1B000,), + (0x1B164, 0x1B167), + (0x1F201, 0x1F202), + (0x1F213,), + ] + + class Hangul(unicode_set): + "Unicode set for Hangul (Korean) Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x1100, 0x11FF), + (0x302E, 0x302F), + (0x3131, 0x318E), + (0x3200, 0x321C), + (0x3260, 0x327B), + (0x327E,), + (0xA960, 0xA97C), + (0xAC00, 0xD7A3), + (0xD7B0, 0xD7C6), + (0xD7CB, 0xD7FB), + (0xFFA0, 0xFFBE), + (0xFFC2, 0xFFC7), + (0xFFCA, 0xFFCF), + (0xFFD2, 0xFFD7), + (0xFFDA, 0xFFDC), + ] + + Korean = Hangul + + class CJK(Chinese, Japanese, Hangul): + "Unicode set for combined Chinese, Japanese, and Korean (CJK) Unicode Character Range" + pass + + class Thai(unicode_set): + "Unicode set for Thai Unicode Character Range" + _ranges: UnicodeRangeList = [(0x0E01, 0x0E3A), (0x0E3F, 0x0E5B)] + + class Arabic(unicode_set): + "Unicode set for Arabic Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x0600, 0x061B), + (0x061E, 0x06FF), + (0x0700, 0x077F), + ] + + class Hebrew(unicode_set): + "Unicode set for Hebrew Unicode Character Range" + _ranges: UnicodeRangeList = [ + (0x0591, 0x05C7), + (0x05D0, 0x05EA), + (0x05EF, 0x05F4), + (0xFB1D, 0xFB36), + (0xFB38, 0xFB3C), + (0xFB3E,), + (0xFB40, 0xFB41), + (0xFB43, 0xFB44), + (0xFB46, 0xFB4F), + ] + + class Devanagari(unicode_set): + "Unicode set for Devanagari Unicode Character Range" + _ranges: UnicodeRangeList = [(0x0900, 0x097F), (0xA8E0, 0xA8FF)] + + +pyparsing_unicode.Japanese._ranges = ( + pyparsing_unicode.Japanese.Kanji._ranges + + pyparsing_unicode.Japanese.Hiragana._ranges + + pyparsing_unicode.Japanese.Katakana._ranges +) + +# define ranges in language character sets +pyparsing_unicode.العربية = pyparsing_unicode.Arabic +pyparsing_unicode.中文 = pyparsing_unicode.Chinese +pyparsing_unicode.кириллица = pyparsing_unicode.Cyrillic +pyparsing_unicode.Ελληνικά = pyparsing_unicode.Greek +pyparsing_unicode.עִברִית = pyparsing_unicode.Hebrew +pyparsing_unicode.日本語 = pyparsing_unicode.Japanese +pyparsing_unicode.Japanese.漢字 = pyparsing_unicode.Japanese.Kanji +pyparsing_unicode.Japanese.カタカナ = pyparsing_unicode.Japanese.Katakana +pyparsing_unicode.Japanese.ひらがな = pyparsing_unicode.Japanese.Hiragana +pyparsing_unicode.한국어 = pyparsing_unicode.Korean +pyparsing_unicode.ไทย = pyparsing_unicode.Thai +pyparsing_unicode.देवनागरी = pyparsing_unicode.Devanagari diff --git a/setuptools/_vendor/pyparsing/util.py b/setuptools/_vendor/pyparsing/util.py new file mode 100644 index 0000000..34ce092 --- /dev/null +++ b/setuptools/_vendor/pyparsing/util.py @@ -0,0 +1,235 @@ +# util.py +import warnings +import types +import collections +import itertools +from functools import lru_cache +from typing import List, Union, Iterable + +_bslash = chr(92) + + +class __config_flags: + """Internal class for defining compatibility and debugging flags""" + + _all_names: List[str] = [] + _fixed_names: List[str] = [] + _type_desc = "configuration" + + @classmethod + def _set(cls, dname, value): + if dname in cls._fixed_names: + warnings.warn( + "{}.{} {} is {} and cannot be overridden".format( + cls.__name__, + dname, + cls._type_desc, + str(getattr(cls, dname)).upper(), + ) + ) + return + if dname in cls._all_names: + setattr(cls, dname, value) + else: + raise ValueError("no such {} {!r}".format(cls._type_desc, dname)) + + enable = classmethod(lambda cls, name: cls._set(name, True)) + disable = classmethod(lambda cls, name: cls._set(name, False)) + + +@lru_cache(maxsize=128) +def col(loc: int, strg: str) -> int: + """ + Returns current column within a string, counting newlines as line separators. + The first column is number 1. + + Note: the default parsing behavior is to expand tabs in the input string + before starting the parsing process. See + :class:`ParserElement.parseString` for more + information on parsing strings containing ```` s, and suggested + methods to maintain a consistent view of the parsed string, the parse + location, and line and column positions within the parsed string. + """ + s = strg + return 1 if 0 < loc < len(s) and s[loc - 1] == "\n" else loc - s.rfind("\n", 0, loc) + + +@lru_cache(maxsize=128) +def lineno(loc: int, strg: str) -> int: + """Returns current line number within a string, counting newlines as line separators. + The first line is number 1. + + Note - the default parsing behavior is to expand tabs in the input string + before starting the parsing process. See :class:`ParserElement.parseString` + for more information on parsing strings containing ```` s, and + suggested methods to maintain a consistent view of the parsed string, the + parse location, and line and column positions within the parsed string. + """ + return strg.count("\n", 0, loc) + 1 + + +@lru_cache(maxsize=128) +def line(loc: int, strg: str) -> str: + """ + Returns the line of text containing loc within a string, counting newlines as line separators. + """ + last_cr = strg.rfind("\n", 0, loc) + next_cr = strg.find("\n", loc) + return strg[last_cr + 1 : next_cr] if next_cr >= 0 else strg[last_cr + 1 :] + + +class _UnboundedCache: + def __init__(self): + cache = {} + cache_get = cache.get + self.not_in_cache = not_in_cache = object() + + def get(_, key): + return cache_get(key, not_in_cache) + + def set_(_, key, value): + cache[key] = value + + def clear(_): + cache.clear() + + self.size = None + self.get = types.MethodType(get, self) + self.set = types.MethodType(set_, self) + self.clear = types.MethodType(clear, self) + + +class _FifoCache: + def __init__(self, size): + self.not_in_cache = not_in_cache = object() + cache = collections.OrderedDict() + cache_get = cache.get + + def get(_, key): + return cache_get(key, not_in_cache) + + def set_(_, key, value): + cache[key] = value + while len(cache) > size: + cache.popitem(last=False) + + def clear(_): + cache.clear() + + self.size = size + self.get = types.MethodType(get, self) + self.set = types.MethodType(set_, self) + self.clear = types.MethodType(clear, self) + + +class LRUMemo: + """ + A memoizing mapping that retains `capacity` deleted items + + The memo tracks retained items by their access order; once `capacity` items + are retained, the least recently used item is discarded. + """ + + def __init__(self, capacity): + self._capacity = capacity + self._active = {} + self._memory = collections.OrderedDict() + + def __getitem__(self, key): + try: + return self._active[key] + except KeyError: + self._memory.move_to_end(key) + return self._memory[key] + + def __setitem__(self, key, value): + self._memory.pop(key, None) + self._active[key] = value + + def __delitem__(self, key): + try: + value = self._active.pop(key) + except KeyError: + pass + else: + while len(self._memory) >= self._capacity: + self._memory.popitem(last=False) + self._memory[key] = value + + def clear(self): + self._active.clear() + self._memory.clear() + + +class UnboundedMemo(dict): + """ + A memoizing mapping that retains all deleted items + """ + + def __delitem__(self, key): + pass + + +def _escape_regex_range_chars(s: str) -> str: + # escape these chars: ^-[] + for c in r"\^-[]": + s = s.replace(c, _bslash + c) + s = s.replace("\n", r"\n") + s = s.replace("\t", r"\t") + return str(s) + + +def _collapse_string_to_ranges( + s: Union[str, Iterable[str]], re_escape: bool = True +) -> str: + def is_consecutive(c): + c_int = ord(c) + is_consecutive.prev, prev = c_int, is_consecutive.prev + if c_int - prev > 1: + is_consecutive.value = next(is_consecutive.counter) + return is_consecutive.value + + is_consecutive.prev = 0 + is_consecutive.counter = itertools.count() + is_consecutive.value = -1 + + def escape_re_range_char(c): + return "\\" + c if c in r"\^-][" else c + + def no_escape_re_range_char(c): + return c + + if not re_escape: + escape_re_range_char = no_escape_re_range_char + + ret = [] + s = "".join(sorted(set(s))) + if len(s) > 3: + for _, chars in itertools.groupby(s, key=is_consecutive): + first = last = next(chars) + last = collections.deque( + itertools.chain(iter([last]), chars), maxlen=1 + ).pop() + if first == last: + ret.append(escape_re_range_char(first)) + else: + sep = "" if ord(last) == ord(first) + 1 else "-" + ret.append( + "{}{}{}".format( + escape_re_range_char(first), sep, escape_re_range_char(last) + ) + ) + else: + ret = [escape_re_range_char(c) for c in s] + + return "".join(ret) + + +def _flatten(ll: list) -> list: + ret = [] + for i in ll: + if isinstance(i, list): + ret.extend(_flatten(i)) + else: + ret.append(i) + return ret diff --git a/setuptools/_vendor/vendored.txt b/setuptools/_vendor/vendored.txt index b08b0d6..95de2dc 100644 --- a/setuptools/_vendor/vendored.txt +++ b/setuptools/_vendor/vendored.txt @@ -1,5 +1,5 @@ packaging==21.3 -pyparsing==2.2.1 +pyparsing==3.0.8 ordered-set==3.1.1 more_itertools==8.8.0 jaraco.text==3.7.0 diff --git a/setuptools/command/build_py.py b/setuptools/command/build_py.py index c3fdc09..91f4741 100644 --- a/setuptools/command/build_py.py +++ b/setuptools/command/build_py.py @@ -1,3 +1,4 @@ +from functools import partial from glob import glob from distutils.util import convert_path import distutils.command.build_py as orig @@ -8,6 +9,9 @@ import io import distutils.errors import itertools import stat +import warnings +from pathlib import Path +from setuptools._deprecation_warning import SetuptoolsDeprecationWarning from setuptools.extern.more_itertools import unique_everseen @@ -98,7 +102,7 @@ class build_py(orig.build_py): package, src_dir, ) - globs_expanded = map(glob, patterns) + globs_expanded = map(partial(glob, recursive=True), patterns) # flatten the expanded globs into an iterable of matches globs_matches = itertools.chain.from_iterable(globs_expanded) glob_files = filter(os.path.isfile, globs_matches) @@ -129,6 +133,7 @@ class build_py(orig.build_py): src_dirs[assert_relative(self.get_package_dir(package))] = package self.run_command('egg_info') + check = _IncludePackageDataAbuse() ei_cmd = self.get_finalized_command('egg_info') for path in ei_cmd.filelist.files: d, f = os.path.split(assert_relative(path)) @@ -139,8 +144,13 @@ class build_py(orig.build_py): d, df = os.path.split(d) f = os.path.join(df, f) if d in src_dirs: - if path.endswith('.py') and f == oldf: - continue # it's a module, not data + if f == oldf: + if check.is_module(f): + continue # it's a module, not data + else: + importable = check.importable_subpackage(src_dirs[d], f) + if importable: + check.warn(importable) mf.setdefault(src_dirs[d], []).append(path) def get_data_files(self): @@ -240,3 +250,44 @@ def assert_relative(path): % path ) raise DistutilsSetupError(msg) + + +class _IncludePackageDataAbuse: + """Inform users that package or module is included as 'data file'""" + + MESSAGE = """\ + !!\n\n + ############################ + # Package would be ignored # + ############################ + Python recognizes {importable!r} as an importable package, however it is + included in the distribution as "data". + This behavior is likely to change in future versions of setuptools (and + therefore is considered deprecated). + + Please make sure that {importable!r} is included as a package by using + setuptools' `packages` configuration field or the proper discovery methods. + + You can read more about "package discovery" and "data files" on setuptools + documentation page. + \n\n!! + """ + + def __init__(self): + self._already_warned = set() + + def is_module(self, file): + return file.endswith(".py") and file[:-len(".py")].isidentifier() + + def importable_subpackage(self, parent, file): + pkg = Path(file).parent + parts = list(itertools.takewhile(str.isidentifier, pkg.parts)) + if parts: + return ".".join([parent, *parts]) + return None + + def warn(self, importable): + if importable not in self._already_warned: + msg = textwrap.dedent(self.MESSAGE).format(importable=importable) + warnings.warn(msg, SetuptoolsDeprecationWarning, stacklevel=2) + self._already_warned.add(importable) diff --git a/setuptools/config/_apply_pyprojecttoml.py b/setuptools/config/_apply_pyprojecttoml.py index a580b63..4b4ed9d 100644 --- a/setuptools/config/_apply_pyprojecttoml.py +++ b/setuptools/config/_apply_pyprojecttoml.py @@ -16,6 +16,8 @@ from types import MappingProxyType from typing import (TYPE_CHECKING, Any, Callable, Dict, List, Optional, Set, Tuple, Type, Union) +from setuptools._deprecation_warning import SetuptoolsDeprecationWarning + if TYPE_CHECKING: from setuptools._importlib import metadata # noqa from setuptools.dist import Distribution # noqa @@ -75,6 +77,12 @@ def _apply_tool_table(dist: "Distribution", config: dict, filename: _Path): for field, value in tool_table.items(): norm_key = json_compatible_key(field) + + if norm_key in TOOL_TABLE_DEPRECATIONS: + suggestion = TOOL_TABLE_DEPRECATIONS[norm_key] + msg = f"The parameter `{norm_key}` is deprecated, {suggestion}" + warnings.warn(msg, SetuptoolsDeprecationWarning) + norm_key = TOOL_TABLE_RENAMES.get(norm_key, norm_key) _set_config(dist, norm_key, value) @@ -181,8 +189,10 @@ def _python_requires(dist: "Distribution", val: dict, _root_dir): def _dependencies(dist: "Distribution", val: list, _root_dir): - existing = getattr(dist, "install_requires", []) - _set_config(dist, "install_requires", existing + val) + if getattr(dist, "install_requires", []): + msg = "`install_requires` overwritten in `pyproject.toml` (dependencies)" + warnings.warn(msg) + _set_config(dist, "install_requires", val) def _optional_dependencies(dist: "Distribution", val: dict, _root_dir): @@ -305,6 +315,9 @@ PYPROJECT_CORRESPONDENCE: Dict[str, _Correspondence] = { } TOOL_TABLE_RENAMES = {"script_files": "scripts"} +TOOL_TABLE_DEPRECATIONS = { + "namespace_packages": "consider using implicit namespaces instead (PEP 420)." +} SETUPTOOLS_PATCHES = {"long_description_content_type", "project_urls", "provides_extras", "license_file", "license_files"} diff --git a/setuptools/config/setupcfg.py b/setuptools/config/setupcfg.py index d485a8b..b2d5c34 100644 --- a/setuptools/config/setupcfg.py +++ b/setuptools/config/setupcfg.py @@ -12,6 +12,7 @@ from typing import (TYPE_CHECKING, Callable, Any, Dict, Generic, Iterable, List, from distutils.errors import DistutilsOptionError, DistutilsFileError from setuptools.extern.packaging.version import Version, InvalidVersion from setuptools.extern.packaging.specifiers import SpecifierSet +from setuptools._deprecation_warning import SetuptoolsDeprecationWarning from . import expand @@ -507,7 +508,7 @@ class ConfigMetadataHandler(ConfigHandler["DistributionMetadata"]): parse_list, "The requires parameter is deprecated, please use " "install_requires for runtime dependencies.", - DeprecationWarning, + SetuptoolsDeprecationWarning, ), 'obsoletes': parse_list, 'classifiers': self._get_parser_compound(parse_file, parse_list), @@ -516,7 +517,7 @@ class ConfigMetadataHandler(ConfigHandler["DistributionMetadata"]): exclude_files_parser('license_file'), "The license_file parameter is deprecated, " "use license_files instead.", - DeprecationWarning, + SetuptoolsDeprecationWarning, ), 'license_files': parse_list, 'description': parse_file, @@ -584,7 +585,12 @@ class ConfigOptionsHandler(ConfigHandler["Distribution"]): 'scripts': parse_list, 'eager_resources': parse_list, 'dependency_links': parse_list, - 'namespace_packages': parse_list, + 'namespace_packages': self._deprecated_config_handler( + parse_list, + "The namespace_packages parameter is deprecated, " + "consider using implicit namespaces instead (PEP 420).", + SetuptoolsDeprecationWarning, + ), 'install_requires': parse_list_semicolon, 'setup_requires': parse_list_semicolon, 'tests_require': parse_list_semicolon, diff --git a/setuptools/dist.py b/setuptools/dist.py index 5507167..37021ac 100644 --- a/setuptools/dist.py +++ b/setuptools/dist.py @@ -280,6 +280,11 @@ def check_nsp(dist, attr, value): nsp, parent, ) + msg = ( + "The namespace_packages parameter is deprecated, " + "consider using implicit namespaces instead (PEP 420).", + ) + warnings.warn(msg, SetuptoolsDeprecationWarning) def check_extras(dist, attr, value): diff --git a/setuptools/tests/config/test_apply_pyprojecttoml.py b/setuptools/tests/config/test_apply_pyprojecttoml.py index 4f54169..2194197 100644 --- a/setuptools/tests/config/test_apply_pyprojecttoml.py +++ b/setuptools/tests/config/test_apply_pyprojecttoml.py @@ -6,6 +6,7 @@ To run these tests offline, please have a look on ``./downloads/preload.py`` import io import re import tarfile +from inspect import cleandoc from pathlib import Path from unittest.mock import Mock from zipfile import ZipFile @@ -14,6 +15,7 @@ import pytest from ini2toml.api import Translator import setuptools # noqa ensure monkey patch to metadata +from setuptools._deprecation_warning import SetuptoolsDeprecationWarning from setuptools.dist import Distribution from setuptools.config import setupcfg, pyprojecttoml from setuptools.config import expand @@ -211,6 +213,21 @@ def test_license_and_license_files(tmp_path): assert dist.metadata.license == "LicenseRef-Proprietary\n" +class TestDeprecatedFields: + def test_namespace_packages(self, tmp_path): + pyproject = tmp_path / "pyproject.toml" + config = """ + [project] + name = "myproj" + version = "42" + [tool.setuptools] + namespace-packages = ["myproj.pkg"] + """ + pyproject.write_text(cleandoc(config), encoding="utf-8") + with pytest.warns(SetuptoolsDeprecationWarning, match="namespace_packages"): + pyprojecttoml.apply_configuration(makedist(tmp_path), pyproject) + + class TestPresetField: def pyproject(self, tmp_path, dynamic, extra_content=""): content = f"[project]\nname = 'proj'\ndynamic = {dynamic!r}\n" @@ -257,6 +274,15 @@ class TestPresetField: dist_value = _some_attrgetter(f"metadata.{attr}", attr)(dist) assert dist_value == value + def test_warning_overwritten_dependencies(self, tmp_path): + src = "[project]\nname='pkg'\nversion='0.1'\ndependencies=['click']\n" + pyproject = tmp_path / "pyproject.toml" + pyproject.write_text(src, encoding="utf-8") + dist = makedist(tmp_path, install_requires=["wheel"]) + with pytest.warns(match="`install_requires` overwritten"): + dist = pyprojecttoml.apply_configuration(dist, pyproject) + assert "wheel" not in dist.install_requires + def test_optional_dependencies_dont_remove_env_markers(self, tmp_path): """ Internally setuptools converts dependencies with markers to "extras". diff --git a/setuptools/tests/config/test_setupcfg.py b/setuptools/tests/config/test_setupcfg.py index 1f35f83..904b1ef 100644 --- a/setuptools/tests/config/test_setupcfg.py +++ b/setuptools/tests/config/test_setupcfg.py @@ -7,6 +7,7 @@ from unittest.mock import Mock, patch import pytest from distutils.errors import DistutilsOptionError, DistutilsFileError +from setuptools._deprecation_warning import SetuptoolsDeprecationWarning from setuptools.dist import Distribution, _Distribution from setuptools.config.setupcfg import ConfigHandler, read_configuration from ..textwrap import DALS @@ -409,7 +410,7 @@ class TestMetadata: 'requires = some, requirement\n', ) - with pytest.deprecated_call(): + with pytest.warns(SetuptoolsDeprecationWarning, match="requires"): with get_dist(tmpdir) as dist: metadata = dist.metadata @@ -518,7 +519,8 @@ class TestOptions: 'python_requires = >=1.0, !=2.8\n' 'py_modules = module1, module2\n', ) - with get_dist(tmpdir) as dist: + deprec = pytest.warns(SetuptoolsDeprecationWarning, match="namespace_packages") + with deprec, get_dist(tmpdir) as dist: assert dist.zip_safe assert dist.include_package_data assert dist.package_dir == {'': 'src', 'b': 'c'} @@ -572,7 +574,8 @@ class TestOptions: ' http://some.com/here/1\n' ' http://some.com/there/2\n', ) - with get_dist(tmpdir) as dist: + deprec = pytest.warns(SetuptoolsDeprecationWarning, match="namespace_packages") + with deprec, get_dist(tmpdir) as dist: assert dist.package_dir == {'': 'src', 'b': 'c'} assert dist.packages == ['pack_a', 'pack_b.subpack'] assert dist.namespace_packages == ['pack1', 'pack2'] diff --git a/setuptools/tests/test_build_py.py b/setuptools/tests/test_build_py.py index 19c8b78..13fa64d 100644 --- a/setuptools/tests/test_build_py.py +++ b/setuptools/tests/test_build_py.py @@ -3,9 +3,14 @@ import stat import shutil import pytest +import jaraco.path +from path import Path +from setuptools import SetuptoolsDeprecationWarning from setuptools.dist import Distribution +from .textwrap import DALS + def test_directories_in_package_data_glob(tmpdir_cwd): """ @@ -25,6 +30,29 @@ def test_directories_in_package_data_glob(tmpdir_cwd): dist.run_commands() +def test_recursive_in_package_data_glob(tmpdir_cwd): + """ + Files matching recursive globs (**) in package_data should + be included in the package data. + + #1806 + """ + dist = Distribution(dict( + script_name='setup.py', + script_args=['build_py'], + packages=[''], + package_data={'': ['path/**/data']}, + )) + os.makedirs('path/subpath/subsubpath') + open('path/subpath/subsubpath/data', 'w').close() + + dist.parse_command_line() + dist.run_commands() + + assert stat.S_ISREG(os.stat('build/lib/path/subpath/subsubpath/data').st_mode), \ + "File is not included" + + def test_read_only(tmpdir_cwd): """ Ensure read-only flag is not preserved in copy @@ -79,3 +107,69 @@ def test_executable_data(tmpdir_cwd): assert os.stat('build/lib/pkg/run-me').st_mode & stat.S_IEXEC, \ "Script is not executable" + + +def test_excluded_subpackages(tmp_path): + files = { + "setup.cfg": DALS(""" + [metadata] + name = mypkg + version = 42 + + [options] + include_package_data = True + packages = find: + + [options.packages.find] + exclude = *.tests* + """), + "mypkg": { + "__init__.py": "", + "resource_file.txt": "", + "tests": { + "__init__.py": "", + "test_mypkg.py": "", + "test_file.txt": "", + } + }, + "MANIFEST.in": DALS(""" + global-include *.py *.txt + global-exclude *.py[cod] + prune dist + prune build + prune *.egg-info + """) + } + + with Path(tmp_path): + jaraco.path.build(files) + dist = Distribution({"script_name": "%PEP 517%"}) + dist.parse_config_files() + + build_py = dist.get_command_obj("build_py") + msg = r"Python recognizes 'mypkg\.tests' as an importable package" + with pytest.warns(SetuptoolsDeprecationWarning, match=msg): + # TODO: To fix #3260 we need some transition period to deprecate the + # existing behavior of `include_package_data`. After the transition, we + # should remove the warning and fix the behaviour. + build_py.finalize_options() + build_py.run() + + build_dir = Path(dist.get_command_obj("build_py").build_lib) + assert (build_dir / "mypkg/__init__.py").exists() + assert (build_dir / "mypkg/resource_file.txt").exists() + + # Setuptools is configured to ignore `mypkg.tests`, therefore the following + # files/dirs should not be included in the distribution. + for f in [ + "mypkg/tests/__init__.py", + "mypkg/tests/test_mypkg.py", + "mypkg/tests/test_file.txt", + "mypkg/tests", + ]: + with pytest.raises(AssertionError): + # TODO: Enforce the following assertion once #3260 is fixed + # (remove context manager and the following xfail). + assert not (build_dir / f).exists() + + pytest.xfail("#3260")