2 # QR Code generator demo (Python)
4 # Run this command-line program with no arguments. The program computes a bunch of demonstration
5 # QR Codes and prints them to the console. Also, the SVG code for one QR Code is printed as a sample.
7 # Copyright (c) Project Nayuki. (MIT License)
8 # https://www.nayuki.io/page/qr-code-generator-library
10 # Permission is hereby granted, free of charge, to any person obtaining a copy of
11 # this software and associated documentation files (the "Software"), to deal in
12 # the Software without restriction, including without limitation the rights to
13 # use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
14 # the Software, and to permit persons to whom the Software is furnished to do so,
15 # subject to the following conditions:
16 # - The above copyright notice and this permission notice shall be included in
17 # all copies or substantial portions of the Software.
18 # - The Software is provided "as is", without warranty of any kind, express or
19 # implied, including but not limited to the warranties of merchantability,
20 # fitness for a particular purpose and noninfringement. In no event shall the
21 # authors or copyright holders be liable for any claim, damages or other
22 # liability, whether in an action of contract, tort or otherwise, arising from,
23 # out of or in connection with the Software or the use or other dealings in the
27 from qrcodegen import QrCode, QrSegment
31 """The main application program."""
39 # ---- Demo suite ----
41 def do_basic_demo() -> None:
42 """Creates a single QR Code, then prints it to the console."""
43 text = "Hello, world!" # User-supplied Unicode text
44 errcorlvl = QrCode.Ecc.LOW # Error correction level
46 # Make and print the QR Code symbol
47 qr = QrCode.encode_text(text, errcorlvl)
49 print(qr.to_svg_str(4))
52 def do_variety_demo() -> None:
53 """Creates a variety of QR Codes that exercise different features of the library, and prints each one to the console."""
55 # Numeric mode encoding (3.33 bits per digit)
56 qr = QrCode.encode_text("314159265358979323846264338327950288419716939937510", QrCode.Ecc.MEDIUM)
59 # Alphanumeric mode encoding (5.5 bits per character)
60 qr = QrCode.encode_text("DOLLAR-AMOUNT:$39.87 PERCENTAGE:100.00% OPERATIONS:+-*/", QrCode.Ecc.HIGH)
63 # Unicode text as UTF-8
64 qr = QrCode.encode_text("\u3053\u3093\u306B\u3061\u0077\u0061\u3001\u4E16\u754C\uFF01\u0020\u03B1\u03B2\u03B3\u03B4", QrCode.Ecc.QUARTILE)
67 # Moderately large QR Code using longer text (from Lewis Carroll's Alice in Wonderland)
68 qr = QrCode.encode_text(
69 "Alice was beginning to get very tired of sitting by her sister on the bank, "
70 "and of having nothing to do: once or twice she had peeped into the book her sister was reading, "
71 "but it had no pictures or conversations in it, 'and what is the use of a book,' thought Alice "
72 "'without pictures or conversations?' So she was considering in her own mind (as well as she could, "
73 "for the hot day made her feel very sleepy and stupid), whether the pleasure of making a "
74 "daisy-chain would be worth the trouble of getting up and picking the daisies, when suddenly "
75 "a White Rabbit with pink eyes ran close by her.", QrCode.Ecc.HIGH)
79 def do_segment_demo() -> None:
80 """Creates QR Codes with manually specified segments for better compactness."""
82 # Illustration "silver"
83 silver0 = "THE SQUARE ROOT OF 2 IS 1."
84 silver1 = "41421356237309504880168872420969807856967187537694807317667973799"
85 qr = QrCode.encode_text(silver0 + silver1, QrCode.Ecc.LOW)
89 QrSegment.make_alphanumeric(silver0),
90 QrSegment.make_numeric(silver1)]
91 qr = QrCode.encode_segments(segs, QrCode.Ecc.LOW)
94 # Illustration "golden"
95 golden0 = "Golden ratio \u03C6 = 1."
96 golden1 = "6180339887498948482045868343656381177203091798057628621354486227052604628189024497072072041893911374"
98 qr = QrCode.encode_text(golden0 + golden1 + golden2, QrCode.Ecc.LOW)
102 QrSegment.make_bytes(golden0.encode("UTF-8")),
103 QrSegment.make_numeric(golden1),
104 QrSegment.make_alphanumeric(golden2)]
105 qr = QrCode.encode_segments(segs, QrCode.Ecc.LOW)
108 # Illustration "Madoka": kanji, kana, Cyrillic, full-width Latin, Greek characters
109 madoka = "\u300C\u9B54\u6CD5\u5C11\u5973\u307E\u3069\u304B\u2606\u30DE\u30AE\u30AB\u300D\u3063\u3066\u3001\u3000\u0418\u0410\u0418\u3000\uFF44\uFF45\uFF53\uFF55\u3000\u03BA\u03B1\uFF1F"
110 qr = QrCode.encode_text(madoka, QrCode.Ecc.LOW)
113 kanjicharbits = [ # Kanji mode encoding (13 bits per character)
114 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 1,
115 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0,
116 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
117 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1,
118 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 1,
119 0, 0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0,
120 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1,
121 0, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1,
122 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1,
123 0, 0, 0, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1,
124 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1,
125 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0,
126 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0,
127 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1,
128 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0,
129 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
130 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
131 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1,
132 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0,
133 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1,
134 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
135 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0,
136 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1,
137 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1,
138 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1,
139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
140 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0,
141 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1,
142 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
144 segs = [QrSegment(QrSegment.Mode.KANJI, len(kanjicharbits) // 13, kanjicharbits)]
145 qr = QrCode.encode_segments(segs, QrCode.Ecc.LOW)
149 def do_mask_demo() -> None:
150 """Creates QR Codes with the same size and contents but different mask patterns."""
153 segs = QrSegment.make_segments("https://www.nayuki.io/")
154 print_qr(QrCode.encode_segments(segs, QrCode.Ecc.HIGH, mask=-1)) # Automatic mask
155 print_qr(QrCode.encode_segments(segs, QrCode.Ecc.HIGH, mask=3)) # Force mask 3
157 # Chinese text as UTF-8
158 segs = QrSegment.make_segments(
159 "\u7DAD\u57FA\u767E\u79D1\uFF08\u0057\u0069\u006B\u0069\u0070\u0065\u0064\u0069\u0061\uFF0C"
160 "\u8046\u807D\u0069\u002F\u02CC\u0077\u026A\u006B\u1D7B\u02C8\u0070\u0069\u02D0\u0064\u0069"
161 "\u002E\u0259\u002F\uFF09\u662F\u4E00\u500B\u81EA\u7531\u5167\u5BB9\u3001\u516C\u958B\u7DE8"
162 "\u8F2F\u4E14\u591A\u8A9E\u8A00\u7684\u7DB2\u8DEF\u767E\u79D1\u5168\u66F8\u5354\u4F5C\u8A08"
164 print_qr(QrCode.encode_segments(segs, QrCode.Ecc.MEDIUM, mask=0)) # Force mask 0
165 print_qr(QrCode.encode_segments(segs, QrCode.Ecc.MEDIUM, mask=1)) # Force mask 1
166 print_qr(QrCode.encode_segments(segs, QrCode.Ecc.MEDIUM, mask=5)) # Force mask 5
167 print_qr(QrCode.encode_segments(segs, QrCode.Ecc.MEDIUM, mask=7)) # Force mask 7
171 # ---- Utilities ----
173 def print_qr(qrcode: QrCode) -> None:
174 """Prints the given QrCode object to the console."""
176 for y in range(-border, qrcode.get_size() + border):
177 for x in range(-border, qrcode.get_size() + border):
178 print("\u2588 "[1 if qrcode.get_module(x,y) else 0] * 2, end="")
183 # Run the main program
184 if __name__ == "__main__":