doc/html/api/lxml.html.Classes-class.html

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  43     <td width="100%">
  44       <span class="breadcrumbs">
  45         lxml ::
  46         html ::
  47         Classes ::
  48         Class&nbsp;Classes
  49       </span>
  50     </td>
  51     <td>
  52       <table cellpadding="0" cellspacing="0">
  53         <!-- hide/show private -->
  54         <tr><td align="right"><span class="options">[<a href="javascript:void(0);" class="privatelink"
  55     onclick="toggle_private();">hide&nbsp;private</a>]</span></td></tr>
  56         <tr><td align="right"><span class="options"
  57             >[<a href="frames.html" target="_top">frames</a
  58             >]&nbsp;|&nbsp;<a href="lxml.html.Classes-class.html"
  59             target="_top">no&nbsp;frames</a>]</span></td></tr>
  60       </table>
  61     </td>
  62   </tr>
  63 </table>
  64 <!-- ==================== CLASS DESCRIPTION ==================== -->
  65 <h1 class="epydoc">Class Classes</h1><p class="nomargin-top"><span class="codelink"><a href="lxml.html-pysrc.html#Classes">source&nbsp;code</a></span></p>
  66 <pre class="base-tree">
  67        object --+
  68                 |
  69     _abcoll.Sized --+
  70                     |
  71        object --+   |
  72                 |   |
  73  _abcoll.Iterable --+
  74                     |
  75        object --+   |
  76                 |   |
  77 _abcoll.Container --+
  78                     |
  79           _abcoll.Set --+
  80                         |
  81        _abcoll.MutableSet --+
  82                             |
  83                            <strong class="uidshort">Classes</strong>
  84 </pre>
  85
  86 <hr />
  87 <p>Provides access to an element's class attribute as a set-like collection.
  88 Usage:</p>
  89 <pre class="rst-literal-block">
  90 &gt;&gt;&gt; el = fromstring('&lt;p class=&quot;hidden large&quot;&gt;Text&lt;/p&gt;')
  91 &gt;&gt;&gt; classes = el.classes  # or: classes = Classes(el.attrib)
  92 &gt;&gt;&gt; classes |= ['block', 'paragraph']
  93 &gt;&gt;&gt; el.get('class')
  94 'hidden large block paragraph'
  95 &gt;&gt;&gt; classes.toggle('hidden')
  96 False
  97 &gt;&gt;&gt; el.get('class')
  98 'large block paragraph'
  99 &gt;&gt;&gt; classes -= ('some', 'classes', 'block')
 100 &gt;&gt;&gt; el.get('class')
 101 'large paragraph'
 102 </pre>
 103
 104 <!-- ==================== NESTED CLASSES ==================== -->
 105 <a name="section-NestedClasses"></a>
 106 <table class="summary" border="1" cellpadding="3"
 107        cellspacing="0" width="100%" bgcolor="white">
 108 <tr bgcolor="#70b0f0" class="table-header">
 109   <td colspan="2" class="table-header">
 110     <table border="0" cellpadding="0" cellspacing="0" width="100%">
 111       <tr valign="top">
 112         <td align="left"><span class="table-header">Nested Classes</span></td>
 113         <td align="right" valign="top"
 114          ><span class="options">[<a href="#section-NestedClasses"
 115          class="privatelink" onclick="toggle_private();"
 116          >hide private</a>]</span></td>
 117       </tr>
 118     </table>
 119   </td>
 120 </tr>
 121   <tr>
 122     <td colspan="2" class="summary">
 123     <p class="indent-wrapped-lines"><b>Inherited from <code>_abcoll.Sized</code></b>:
 124       <code><a href="abc.ABCMeta-class.html">__metaclass__</a></code>
 125       </p>
 126     </td>
 127   </tr>
 128 </table>
 129 <!-- ==================== INSTANCE METHODS ==================== -->
 130 <a name="section-InstanceMethods"></a>
 131 <table class="summary" border="1" cellpadding="3"
 132        cellspacing="0" width="100%" bgcolor="white">
 133 <tr bgcolor="#70b0f0" class="table-header">
 134   <td colspan="2" class="table-header">
 135     <table border="0" cellpadding="0" cellspacing="0" width="100%">
 136       <tr valign="top">
 137         <td align="left"><span class="table-header">Instance Methods</span></td>
 138         <td align="right" valign="top"
 139          ><span class="options">[<a href="#section-InstanceMethods"
 140          class="privatelink" onclick="toggle_private();"
 141          >hide private</a>]</span></td>
 142       </tr>
 143     </table>
 144   </td>
 145 </tr>
 146 <tr>
 147     <td width="15%" align="right" valign="top" class="summary">
 148       <span class="summary-type">&nbsp;</span>
 149     </td><td class="summary">
 150       <table width="100%" cellpadding="0" cellspacing="0" border="0">
 151         <tr>
 152           <td><span class="summary-sig"><a href="lxml.html.Classes-class.html#__contains__" class="summary-sig-name">__contains__</a>(<span class="summary-sig-arg">self</span>,
 153         <span class="summary-sig-arg">name</span>)</span></td>
 154           <td align="right" valign="top">
 155             <span class="codelink"><a href="lxml.html-pysrc.html#Classes.__contains__">source&nbsp;code</a></span>
 156
 157           </td>
 158         </tr>
 159       </table>
 160
 161     </td>
 162   </tr>
 163 <tr>
 164     <td width="15%" align="right" valign="top" class="summary">
 165       <span class="summary-type">&nbsp;</span>
 166     </td><td class="summary">
 167       <table width="100%" cellpadding="0" cellspacing="0" border="0">
 168         <tr>
 169           <td><span class="summary-sig"><a href="lxml.html.Classes-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">self</span>,
 170         <span class="summary-sig-arg">attributes</span>)</span><br />
 171       x.__init__(...) initializes x; see help(type(x)) for signature</td>
 172           <td align="right" valign="top">
 173             <span class="codelink"><a href="lxml.html-pysrc.html#Classes.__init__">source&nbsp;code</a></span>
 174
 175           </td>
 176         </tr>
 177       </table>
 178
 179     </td>
 180   </tr>
 181 <tr>
 182     <td width="15%" align="right" valign="top" class="summary">
 183       <span class="summary-type">&nbsp;</span>
 184     </td><td class="summary">
 185       <table width="100%" cellpadding="0" cellspacing="0" border="0">
 186         <tr>
 187           <td><span class="summary-sig"><a href="lxml.html.Classes-class.html#__iter__" class="summary-sig-name">__iter__</a>(<span class="summary-sig-arg">self</span>)</span></td>
 188           <td align="right" valign="top">
 189             <span class="codelink"><a href="lxml.html-pysrc.html#Classes.__iter__">source&nbsp;code</a></span>
 190
 191           </td>
 192         </tr>
 193       </table>
 194
 195     </td>
 196   </tr>
 197 <tr>
 198     <td width="15%" align="right" valign="top" class="summary">
 199       <span class="summary-type">&nbsp;</span>
 200     </td><td class="summary">
 201       <table width="100%" cellpadding="0" cellspacing="0" border="0">
 202         <tr>
 203           <td><span class="summary-sig"><a href="lxml.html.Classes-class.html#__len__" class="summary-sig-name">__len__</a>(<span class="summary-sig-arg">self</span>)</span></td>
 204           <td align="right" valign="top">
 205             <span class="codelink"><a href="lxml.html-pysrc.html#Classes.__len__">source&nbsp;code</a></span>
 206
 207           </td>
 208         </tr>
 209       </table>
 210
 211     </td>
 212   </tr>
 213 <tr>
 214     <td width="15%" align="right" valign="top" class="summary">
 215       <span class="summary-type">&nbsp;</span>
 216     </td><td class="summary">
 217       <table width="100%" cellpadding="0" cellspacing="0" border="0">
 218         <tr>
 219           <td><span class="summary-sig"><a href="lxml.html.Classes-class.html#add" class="summary-sig-name">add</a>(<span class="summary-sig-arg">self</span>,
 220         <span class="summary-sig-arg">value</span>)</span><br />
 221       Add a class.</td>
 222           <td align="right" valign="top">
 223             <span class="codelink"><a href="lxml.html-pysrc.html#Classes.add">source&nbsp;code</a></span>
 224
 225           </td>
 226         </tr>
 227       </table>
 228
 229     </td>
 230   </tr>
 231 <tr>
 232     <td width="15%" align="right" valign="top" class="summary">
 233       <span class="summary-type">&nbsp;</span>
 234     </td><td class="summary">
 235       <table width="100%" cellpadding="0" cellspacing="0" border="0">
 236         <tr>
 237           <td><span class="summary-sig"><a href="lxml.html.Classes-class.html#discard" class="summary-sig-name">discard</a>(<span class="summary-sig-arg">self</span>,
 238         <span class="summary-sig-arg">value</span>)</span><br />
 239       Remove a class if it is currently present.</td>
 240           <td align="right" valign="top">
 241             <span class="codelink"><a href="lxml.html-pysrc.html#Classes.discard">source&nbsp;code</a></span>
 242
 243           </td>
 244         </tr>
 245       </table>
 246
 247     </td>
 248   </tr>
 249 <tr>
 250     <td width="15%" align="right" valign="top" class="summary">
 251       <span class="summary-type">&nbsp;</span>
 252     </td><td class="summary">
 253       <table width="100%" cellpadding="0" cellspacing="0" border="0">
 254         <tr>
 255           <td><span class="summary-sig"><a href="lxml.html.Classes-class.html#remove" class="summary-sig-name">remove</a>(<span class="summary-sig-arg">self</span>,
 256         <span class="summary-sig-arg">value</span>)</span><br />
 257       Remove a class; it must currently be present.</td>
 258           <td align="right" valign="top">
 259             <span class="codelink"><a href="lxml.html-pysrc.html#Classes.remove">source&nbsp;code</a></span>
 260
 261           </td>
 262         </tr>
 263       </table>
 264
 265     </td>
 266   </tr>
 267 <tr>
 268     <td width="15%" align="right" valign="top" class="summary">
 269       <span class="summary-type">&nbsp;</span>
 270     </td><td class="summary">
 271       <table width="100%" cellpadding="0" cellspacing="0" border="0">
 272         <tr>
 273           <td><span class="summary-sig"><a href="lxml.html.Classes-class.html#toggle" class="summary-sig-name">toggle</a>(<span class="summary-sig-arg">self</span>,
 274         <span class="summary-sig-arg">value</span>)</span><br />
 275       Add a class name if it isn't there yet, or remove it if it exists.</td>
 276           <td align="right" valign="top">
 277             <span class="codelink"><a href="lxml.html-pysrc.html#Classes.toggle">source&nbsp;code</a></span>
 278
 279           </td>
 280         </tr>
 281       </table>
 282
 283     </td>
 284   </tr>
 285 <tr>
 286     <td width="15%" align="right" valign="top" class="summary">
 287       <span class="summary-type">&nbsp;</span>
 288     </td><td class="summary">
 289       <table width="100%" cellpadding="0" cellspacing="0" border="0">
 290         <tr>
 291           <td><span class="summary-sig"><a name="update"></a><span class="summary-sig-name">update</span>(<span class="summary-sig-arg">self</span>,
 292         <span class="summary-sig-arg">values</span>)</span><br />
 293       Add all names from 'values'.</td>
 294           <td align="right" valign="top">
 295             <span class="codelink"><a href="lxml.html-pysrc.html#Classes.update">source&nbsp;code</a></span>
 296
 297           </td>
 298         </tr>
 299       </table>
 300
 301     </td>
 302   </tr>
 303   <tr>
 304     <td colspan="2" class="summary">
 305     <p class="indent-wrapped-lines"><b>Inherited from <code>_abcoll.MutableSet</code></b>:
 306       <code>__iand__</code>,
 307       <code>__ior__</code>,
 308       <code>__isub__</code>,
 309       <code>__ixor__</code>,
 310       <code>clear</code>,
 311       <code>pop</code>
 312       </p>
 313     <p class="indent-wrapped-lines"><b>Inherited from <code>_abcoll.Set</code></b>:
 314       <code>__and__</code>,
 315       <code>__eq__</code>,
 316       <code>__ge__</code>,
 317       <code>__gt__</code>,
 318       <code>__le__</code>,
 319       <code>__lt__</code>,
 320       <code>__ne__</code>,
 321       <code>__or__</code>,
 322       <code>__rand__</code>,
 323       <code>__ror__</code>,
 324       <code>__rsub__</code>,
 325       <code>__rxor__</code>,
 326       <code>__sub__</code>,
 327       <code>__xor__</code>,
 328       <code>isdisjoint</code>
 329       </p>
 330     <div class="private">    <p class="indent-wrapped-lines"><b>Inherited from <code>_abcoll.Set</code></b> (private):
 331       <code>_hash</code>
 332       </p></div>
 333     <p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
 334       <code>__delattr__</code>,
 335       <code>__format__</code>,
 336       <code>__getattribute__</code>,
 337       <code>__new__</code>,
 338       <code>__reduce__</code>,
 339       <code>__reduce_ex__</code>,
 340       <code>__repr__</code>,
 341       <code>__setattr__</code>,
 342       <code>__sizeof__</code>,
 343       <code>__str__</code>
 344       </p>
 345     </td>
 346   </tr>
 347 </table>
 348 <!-- ==================== CLASS METHODS ==================== -->
 349 <a name="section-ClassMethods"></a>
 350 <table class="summary" border="1" cellpadding="3"
 351        cellspacing="0" width="100%" bgcolor="white">
 352 <tr bgcolor="#70b0f0" class="table-header">
 353   <td colspan="2" class="table-header">
 354     <table border="0" cellpadding="0" cellspacing="0" width="100%">
 355       <tr valign="top">
 356         <td align="left"><span class="table-header">Class Methods</span></td>
 357         <td align="right" valign="top"
 358          ><span class="options">[<a href="#section-ClassMethods"
 359          class="privatelink" onclick="toggle_private();"
 360          >hide private</a>]</span></td>
 361       </tr>
 362     </table>
 363   </td>
 364 </tr>
 365   <tr>
 366     <td colspan="2" class="summary">
 367     <div class="private">    <p class="indent-wrapped-lines"><b>Inherited from <code>_abcoll.Set</code></b> (private):
 368       <code>_from_iterable</code>
 369       </p></div>
 370     <p class="indent-wrapped-lines"><b>Inherited from <code>_abcoll.Sized</code></b>:
 371       <code>__subclasshook__</code>
 372       </p>
 373     </td>
 374   </tr>
 375 </table>
 376 <!-- ==================== CLASS VARIABLES ==================== -->
 377 <a name="section-ClassVariables"></a>
 378 <table class="summary" border="1" cellpadding="3"
 379        cellspacing="0" width="100%" bgcolor="white">
 380 <tr bgcolor="#70b0f0" class="table-header">
 381   <td colspan="2" class="table-header">
 382     <table border="0" cellpadding="0" cellspacing="0" width="100%">
 383       <tr valign="top">
 384         <td align="left"><span class="table-header">Class Variables</span></td>
 385         <td align="right" valign="top"
 386          ><span class="options">[<a href="#section-ClassVariables"
 387          class="privatelink" onclick="toggle_private();"
 388          >hide private</a>]</span></td>
 389       </tr>
 390     </table>
 391   </td>
 392 </tr>
 393 <tr>
 394     <td width="15%" align="right" valign="top" class="summary">
 395       <span class="summary-type">&nbsp;</span>
 396     </td><td class="summary">
 397         <a name="__abstractmethods__"></a><span class="summary-name">__abstractmethods__</span> = <code title="frozenset([])"><code class="variable-group">frozenset([</code><code class="variable-group">])</code></code>
 398     </td>
 399   </tr>
 400 <tr class="private">
 401     <td width="15%" align="right" valign="top" class="summary">
 402       <span class="summary-type">&nbsp;</span>
 403     </td><td class="summary">
 404         <a name="_abc_negative_cache"></a><span class="summary-name">_abc_negative_cache</span> = <code title="'WeakSet'"><code class="variable-quote">'</code><code class="variable-string">WeakSet</code><code class="variable-quote">'</code></code>
 405     </td>
 406   </tr>
 407 <tr class="private">
 408     <td width="15%" align="right" valign="top" class="summary">
 409       <span class="summary-type">&nbsp;</span>
 410     </td><td class="summary">
 411         <a name="_abc_negative_cache_version"></a><span class="summary-name">_abc_negative_cache_version</span> = <code title="21">21</code>
 412     </td>
 413   </tr>
 414 <tr class="private">
 415     <td width="15%" align="right" valign="top" class="summary">
 416       <span class="summary-type">&nbsp;</span>
 417     </td><td class="summary">
 418         <a name="_abc_registry"></a><span class="summary-name">_abc_registry</span> = <code title="'WeakSet'"><code class="variable-quote">'</code><code class="variable-string">WeakSet</code><code class="variable-quote">'</code></code>
 419     </td>
 420   </tr>
 421   <tr>
 422     <td colspan="2" class="summary">
 423     <p class="indent-wrapped-lines"><b>Inherited from <code>_abcoll.Set</code></b>:
 424       <code>__hash__</code>
 425       </p>
 426     <div class="private">    <p class="indent-wrapped-lines"><b>Inherited from <code>_abcoll.Sized</code></b> (private):
 427       <code>_abc_cache</code>
 428       </p></div>
 429     </td>
 430   </tr>
 431 </table>
 432 <!-- ==================== PROPERTIES ==================== -->
 433 <a name="section-Properties"></a>
 434 <table class="summary" border="1" cellpadding="3"
 435        cellspacing="0" width="100%" bgcolor="white">
 436 <tr bgcolor="#70b0f0" class="table-header">
 437   <td colspan="2" class="table-header">
 438     <table border="0" cellpadding="0" cellspacing="0" width="100%">
 439       <tr valign="top">
 440         <td align="left"><span class="table-header">Properties</span></td>
 441         <td align="right" valign="top"
 442          ><span class="options">[<a href="#section-Properties"
 443          class="privatelink" onclick="toggle_private();"
 444          >hide private</a>]</span></td>
 445       </tr>
 446     </table>
 447   </td>
 448 </tr>
 449   <tr>
 450     <td colspan="2" class="summary">
 451     <p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
 452       <code>__class__</code>
 453       </p>
 454     </td>
 455   </tr>
 456 </table>
 457 <!-- ==================== METHOD DETAILS ==================== -->
 458 <a name="section-MethodDetails"></a>
 459 <table class="details" border="1" cellpadding="3"
 460        cellspacing="0" width="100%" bgcolor="white">
 461 <tr bgcolor="#70b0f0" class="table-header">
 462   <td colspan="2" class="table-header">
 463     <table border="0" cellpadding="0" cellspacing="0" width="100%">
 464       <tr valign="top">
 465         <td align="left"><span class="table-header">Method Details</span></td>
 466         <td align="right" valign="top"
 467          ><span class="options">[<a href="#section-MethodDetails"
 468          class="privatelink" onclick="toggle_private();"
 469          >hide private</a>]</span></td>
 470       </tr>
 471     </table>
 472   </td>
 473 </tr>
 474 </table>
 475 <a name="__contains__"></a>
 476 <div>
 477 <table class="details" border="1" cellpadding="3"
 478        cellspacing="0" width="100%" bgcolor="white">
 479 <tr><td>
 480   <table width="100%" cellpadding="0" cellspacing="0" border="0">
 481   <tr valign="top"><td>
 482   <h3 class="epydoc"><span class="sig"><span class="sig-name">__contains__</span>(<span class="sig-arg">self</span>,
 483         <span class="sig-arg">name</span>)</span>
 484     <br /><em class="fname">(In operator)</em>
 485   </h3>
 486   </td><td align="right" valign="top"
 487     ><span class="codelink"><a href="lxml.html-pysrc.html#Classes.__contains__">source&nbsp;code</a></span>&nbsp;
 488     </td>
 489   </tr></table>
 490
 491
 492   <dl class="fields">
 493     <dt>Overrides:
 494         _abcoll.Container.__contains__
 495     </dt>
 496   </dl>
 497 </td></tr></table>
 498 </div>
 499 <a name="__init__"></a>
 500 <div>
 501 <table class="details" border="1" cellpadding="3"
 502        cellspacing="0" width="100%" bgcolor="white">
 503 <tr><td>
 504   <table width="100%" cellpadding="0" cellspacing="0" border="0">
 505   <tr valign="top"><td>
 506   <h3 class="epydoc"><span class="sig"><span class="sig-name">__init__</span>(<span class="sig-arg">self</span>,
 507         <span class="sig-arg">attributes</span>)</span>
 508     <br /><em class="fname">(Constructor)</em>
 509   </h3>
 510   </td><td align="right" valign="top"
 511     ><span class="codelink"><a href="lxml.html-pysrc.html#Classes.__init__">source&nbsp;code</a></span>&nbsp;
 512     </td>
 513   </tr></table>
 514
 515   x.__init__(...) initializes x; see help(type(x)) for signature
 516   <dl class="fields">
 517     <dt>Overrides:
 518         object.__init__
 519         <dd><em class="note">(inherited documentation)</em></dd>
 520     </dt>
 521   </dl>
 522 </td></tr></table>
 523 </div>
 524 <a name="__iter__"></a>
 525 <div>
 526 <table class="details" border="1" cellpadding="3"
 527        cellspacing="0" width="100%" bgcolor="white">
 528 <tr><td>
 529   <table width="100%" cellpadding="0" cellspacing="0" border="0">
 530   <tr valign="top"><td>
 531   <h3 class="epydoc"><span class="sig"><span class="sig-name">__iter__</span>(<span class="sig-arg">self</span>)</span>
 532   </h3>
 533   </td><td align="right" valign="top"
 534     ><span class="codelink"><a href="lxml.html-pysrc.html#Classes.__iter__">source&nbsp;code</a></span>&nbsp;
 535     </td>
 536   </tr></table>
 537
 538
 539   <dl class="fields">
 540     <dt>Overrides:
 541         _abcoll.Iterable.__iter__
 542     </dt>
 543   </dl>
 544 </td></tr></table>
 545 </div>
 546 <a name="__len__"></a>
 547 <div>
 548 <table class="details" border="1" cellpadding="3"
 549        cellspacing="0" width="100%" bgcolor="white">
 550 <tr><td>
 551   <table width="100%" cellpadding="0" cellspacing="0" border="0">
 552   <tr valign="top"><td>
 553   <h3 class="epydoc"><span class="sig"><span class="sig-name">__len__</span>(<span class="sig-arg">self</span>)</span>
 554     <br /><em class="fname">(Length operator)</em>
 555   </h3>
 556   </td><td align="right" valign="top"
 557     ><span class="codelink"><a href="lxml.html-pysrc.html#Classes.__len__">source&nbsp;code</a></span>&nbsp;
 558     </td>
 559   </tr></table>
 560
 561
 562   <dl class="fields">
 563     <dt>Overrides:
 564         _abcoll.Sized.__len__
 565     </dt>
 566   </dl>
 567 </td></tr></table>
 568 </div>
 569 <a name="add"></a>
 570 <div>
 571 <table class="details" border="1" cellpadding="3"
 572        cellspacing="0" width="100%" bgcolor="white">
 573 <tr><td>
 574   <table width="100%" cellpadding="0" cellspacing="0" border="0">
 575   <tr valign="top"><td>
 576   <h3 class="epydoc"><span class="sig"><span class="sig-name">add</span>(<span class="sig-arg">self</span>,
 577         <span class="sig-arg">value</span>)</span>
 578   </h3>
 579   </td><td align="right" valign="top"
 580     ><span class="codelink"><a href="lxml.html-pysrc.html#Classes.add">source&nbsp;code</a></span>&nbsp;
 581     </td>
 582   </tr></table>
 583
 584   <p>Add a class.</p>
 585 <p>This has no effect if the class is already present.</p>
 586   <dl class="fields">
 587     <dt>Overrides:
 588         _abcoll.MutableSet.add
 589     </dt>
 590   </dl>
 591 </td></tr></table>
 592 </div>
 593 <a name="discard"></a>
 594 <div>
 595 <table class="details" border="1" cellpadding="3"
 596        cellspacing="0" width="100%" bgcolor="white">
 597 <tr><td>
 598   <table width="100%" cellpadding="0" cellspacing="0" border="0">
 599   <tr valign="top"><td>
 600   <h3 class="epydoc"><span class="sig"><span class="sig-name">discard</span>(<span class="sig-arg">self</span>,
 601         <span class="sig-arg">value</span>)</span>
 602   </h3>
 603   </td><td align="right" valign="top"
 604     ><span class="codelink"><a href="lxml.html-pysrc.html#Classes.discard">source&nbsp;code</a></span>&nbsp;
 605     </td>
 606   </tr></table>
 607
 608   <p>Remove a class if it is currently present.</p>
 609 <p>If the class is not present, do nothing.</p>
 610   <dl class="fields">
 611     <dt>Overrides:
 612         _abcoll.MutableSet.discard
 613     </dt>
 614   </dl>
 615 </td></tr></table>
 616 </div>
 617 <a name="remove"></a>
 618 <div>
 619 <table class="details" border="1" cellpadding="3"
 620        cellspacing="0" width="100%" bgcolor="white">
 621 <tr><td>
 622   <table width="100%" cellpadding="0" cellspacing="0" border="0">
 623   <tr valign="top"><td>
 624   <h3 class="epydoc"><span class="sig"><span class="sig-name">remove</span>(<span class="sig-arg">self</span>,
 625         <span class="sig-arg">value</span>)</span>
 626   </h3>
 627   </td><td align="right" valign="top"
 628     ><span class="codelink"><a href="lxml.html-pysrc.html#Classes.remove">source&nbsp;code</a></span>&nbsp;
 629     </td>
 630   </tr></table>
 631
 632   <p>Remove a class; it must currently be present.</p>
 633 <p>If the class is not present, raise a KeyError.</p>
 634   <dl class="fields">
 635     <dt>Overrides:
 636         _abcoll.MutableSet.remove
 637     </dt>
 638   </dl>
 639 </td></tr></table>
 640 </div>
 641 <a name="toggle"></a>
 642 <div>
 643 <table class="details" border="1" cellpadding="3"
 644        cellspacing="0" width="100%" bgcolor="white">
 645 <tr><td>
 646   <table width="100%" cellpadding="0" cellspacing="0" border="0">
 647   <tr valign="top"><td>
 648   <h3 class="epydoc"><span class="sig"><span class="sig-name">toggle</span>(<span class="sig-arg">self</span>,
 649         <span class="sig-arg">value</span>)</span>
 650   </h3>
 651   </td><td align="right" valign="top"
 652     ><span class="codelink"><a href="lxml.html-pysrc.html#Classes.toggle">source&nbsp;code</a></span>&nbsp;
 653     </td>
 654   </tr></table>
 655
 656   <p>Add a class name if it isn't there yet, or remove it if it exists.</p>
 657 <p>Returns true if the class was added (and is now enabled) and
 658 false if it was removed (and is now disabled).</p>
 659   <dl class="fields">
 660   </dl>
 661 </td></tr></table>
 662 </div>
 663 <br />
 664 <!-- ==================== NAVIGATION BAR ==================== -->
 665 <table class="navbar" border="0" width="100%" cellpadding="0"
 666        bgcolor="#a0c0ff" cellspacing="0">
 667   <tr valign="middle">
 668   <!-- Home link -->
 669       <th>&nbsp;&nbsp;&nbsp;<a
 670         href="lxml-module.html">Home</a>&nbsp;&nbsp;&nbsp;</th>
 671
 672   <!-- Tree link -->
 673       <th>&nbsp;&nbsp;&nbsp;<a
 674         href="module-tree.html">Trees</a>&nbsp;&nbsp;&nbsp;</th>
 675
 676   <!-- Index link -->
 677       <th>&nbsp;&nbsp;&nbsp;<a
 678         href="identifier-index.html">Indices</a>&nbsp;&nbsp;&nbsp;</th>
 679
 680   <!-- Help link -->
 681       <th>&nbsp;&nbsp;&nbsp;<a
 682         href="help.html">Help</a>&nbsp;&nbsp;&nbsp;</th>
 683
 684   <!-- Project homepage -->
 685       <th class="navbar" align="right" width="100%">
 686         <table border="0" cellpadding="0" cellspacing="0">
 687           <tr><th class="navbar" align="center"
 688             ><a class="navbar" target="_top" href="/">lxml API</a></th>
 689           </tr></table></th>
 690   </tr>
 691 </table>
 692 <table border="0" cellpadding="0" cellspacing="0" width="100%%">
 693   <tr>
 694     <td align="left" class="footer">
 695     Generated by Epydoc 3.0.1
 696     on Thu Jul  9 18:29:53 2020
 697     </td>
 698     <td align="right" class="footer">
 699       <a target="mainFrame" href="http://epydoc.sourceforge.net"
 700         >http://epydoc.sourceforge.net</a>
 701     </td>
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 703 </table>
 704
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 706   <!--
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