1# 2# QR Code generator demo (Python) 3# 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. 6# 7# Copyright (c) Project Nayuki. (MIT License) 8# https://www.nayuki.io/page/qr-code-generator-library 9# 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 24# Software. 25# 26 27from qrcodegen import QrCode, QrSegment 28 29 30def main() -> None: 31 """The main application program.""" 32 do_basic_demo() 33 do_variety_demo() 34 do_segment_demo() 35 do_mask_demo() 36 37 38 39# ---- Demo suite ---- 40 41def 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 45 46 # Make and print the QR Code symbol 47 qr = QrCode.encode_text(text, errcorlvl) 48 print_qr(qr) 49 print(to_svg_str(qr, 4)) 50 51 52def 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.""" 54 55 # Numeric mode encoding (3.33 bits per digit) 56 qr = QrCode.encode_text("314159265358979323846264338327950288419716939937510", QrCode.Ecc.MEDIUM) 57 print_qr(qr) 58 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) 61 print_qr(qr) 62 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) 65 print_qr(qr) 66 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) 76 print_qr(qr) 77 78 79def do_segment_demo() -> None: 80 """Creates QR Codes with manually specified segments for better compactness.""" 81 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) 86 print_qr(qr) 87 88 segs = [ 89 QrSegment.make_alphanumeric(silver0), 90 QrSegment.make_numeric(silver1)] 91 qr = QrCode.encode_segments(segs, QrCode.Ecc.LOW) 92 print_qr(qr) 93 94 # Illustration "golden" 95 golden0 = "Golden ratio \u03C6 = 1." 96 golden1 = "6180339887498948482045868343656381177203091798057628621354486227052604628189024497072072041893911374" 97 golden2 = "......" 98 qr = QrCode.encode_text(golden0 + golden1 + golden2, QrCode.Ecc.LOW) 99 print_qr(qr) 100 101 segs = [ 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) 106 print_qr(qr) 107 108 # 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) 111 print_qr(qr) 112 113 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, 143 ] 144 segs = [QrSegment(QrSegment.Mode.KANJI, len(kanjicharbits) // 13, kanjicharbits)] 145 qr = QrCode.encode_segments(segs, QrCode.Ecc.LOW) 146 print_qr(qr) 147 148 149def do_mask_demo() -> None: 150 """Creates QR Codes with the same size and contents but different mask patterns.""" 151 152 # Project Nayuki URL 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 3 156 157 # 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" 163 "\u756B") 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 7 168 169 170 171# ---- Utilities ---- 172 173def to_svg_str(qr: QrCode, border: int) -> str: 174 """Returns a string of SVG code for an image depicting the given QR Code, with the given number 175 of border modules. The string always uses Unix newlines (\n), regardless of the platform.""" 176 if border < 0: 177 raise ValueError("Border must be non-negative") 178 parts: List[str] = [] 179 for y in range(qr.get_size()): 180 for x in range(qr.get_size()): 181 if qr.get_module(x, y): 182 parts.append("M{},{}h1v1h-1z".format(x + border, y + border)) 183 return """<?xml version="1.0" encoding="UTF-8"?> 184<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"> 185<svg xmlns="http://www.w3.org/2000/svg" version="1.1" viewBox="0 0 {0} {0}" stroke="none"> 186 <rect width="100%" height="100%" fill="#FFFFFF"/> 187 <path d="{1}" fill="#000000"/> 188</svg> 189""".format(qr.get_size() + border * 2, " ".join(parts)) 190 191 192def print_qr(qrcode: QrCode) -> None: 193 """Prints the given QrCode object to the console.""" 194 border = 4 195 for y in range(-border, qrcode.get_size() + border): 196 for x in range(-border, qrcode.get_size() + border): 197 print("\u2588 "[1 if qrcode.get_module(x,y) else 0] * 2, end="") 198 print() 199 print() 200 201 202# Run the main program 203if __name__ == "__main__": 204 main() 205