126 lines
4.9 KiB
Python
126 lines
4.9 KiB
Python
#
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# QR Code generator demo (Python 2, 3)
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#
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# Copyright (c) 2016 Project Nayuki
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# https://www.nayuki.io/page/qr-code-generator-library
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#
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# (MIT License)
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# Permission is hereby granted, free of charge, to any person obtaining a copy of
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# this software and associated documentation files (the "Software"), to deal in
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# the Software without restriction, including without limitation the rights to
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# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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# the Software, and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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# - The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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# - The Software is provided "as is", without warranty of any kind, express or
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# implied, including but not limited to the warranties of merchantability,
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# fitness for a particular purpose and noninfringement. In no event shall the
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# authors or copyright holders be liable for any claim, damages or other
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# liability, whether in an action of contract, tort or otherwise, arising from,
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# out of or in connection with the Software or the use or other dealings in the
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# Software.
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#
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from __future__ import print_function
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import qrcodegen
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# ---- Main program ----
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def main():
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"""The main application program."""
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do_basic_demo()
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do_variety_demo()
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do_segment_demo()
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def do_basic_demo():
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"""Creates a single QR Code, then prints it to the console."""
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text = u"Hello, world!" # User-supplied Unicode text
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errcorlvl = qrcodegen.QrCode.Ecc.LOW # Error correction level
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qr = qrcodegen.encode_text(text, errcorlvl)
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print_qr(qr)
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def do_variety_demo():
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"""Creates a variety of QR Codes that exercise different features of the library, and prints each one to the console."""
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# Project Nayuki URL
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qr = qrcodegen.encode_text("https://www.nayuki.io/", qrcodegen.QrCode.Ecc.HIGH)
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qr = qrcodegen.QrCode(qrcode=qr, mask=3) # Change mask, forcing to mask #3
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print_qr(qr)
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# Numeric mode encoding (3.33 bits per digit)
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qr = qrcodegen.encode_text("314159265358979323846264338327950288419716939937510", qrcodegen.QrCode.Ecc.MEDIUM)
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print_qr(qr)
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# Alphanumeric mode encoding (5.5 bits per character)
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qr = qrcodegen.encode_text("DOLLAR-AMOUNT:$39.87 PERCENTAGE:100.00% OPERATIONS:+-*/", qrcodegen.QrCode.Ecc.HIGH)
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print_qr(qr)
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# Unicode text as UTF-8, and different masks
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qr = qrcodegen.encode_text(u"\u3053\u3093\u306B\u3061\u0077\u0061\u3001\u4E16\u754C\uFF01\u0020\u03B1\u03B2\u03B3\u03B4", qrcodegen.QrCode.Ecc.QUARTILE)
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print_qr(qrcodegen.QrCode(qrcode=qr, mask=0))
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print_qr(qrcodegen.QrCode(qrcode=qr, mask=1))
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print_qr(qrcodegen.QrCode(qrcode=qr, mask=5))
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print_qr(qrcodegen.QrCode(qrcode=qr, mask=7))
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# Moderately large QR Code using longer text (from Lewis Carroll's Alice in Wonderland)
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qr = qrcodegen.encode_text("Alice was beginning to get very tired of sitting by her sister on the bank, "
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"and of having nothing to do: once or twice she had peeped into the book her sister was reading, "
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"but it had no pictures or conversations in it, 'and what is the use of a book,' thought Alice "
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"'without pictures or conversations?' So she was considering in her own mind (as well as she could, "
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"for the hot day made her feel very sleepy and stupid), whether the pleasure of making a "
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"daisy-chain would be worth the trouble of getting up and picking the daisies, when suddenly "
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"a White Rabbit with pink eyes ran close by her.", qrcodegen.QrCode.Ecc.HIGH)
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print_qr(qr)
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def do_segment_demo():
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"""Creates QR Codes with manually specified segments for better compactness."""
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# Illustration "silver"
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silver0 = "THE SQUARE ROOT OF 2 IS 1."
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silver1 = "41421356237309504880168872420969807856967187537694807317667973799"
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qr = qrcodegen.encode_text(silver0 + silver1, qrcodegen.QrCode.Ecc.LOW)
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print_qr(qr)
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segs = [
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qrcodegen.QrSegment.make_alphanumeric(silver0),
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qrcodegen.QrSegment.make_numeric(silver1)]
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qr = qrcodegen.encode_segments(segs, qrcodegen.QrCode.Ecc.LOW)
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print_qr(qr)
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# Illustration "golden"
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golden0 = u"Golden ratio \u03C6 = 1."
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golden1 = u"6180339887498948482045868343656381177203091798057628621354486227052604628189024497072072041893911374"
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golden2 = u"......"
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qr = qrcodegen.encode_text(golden0 + golden1 + golden2, qrcodegen.QrCode.Ecc.LOW)
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print_qr(qr)
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segs = [
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qrcodegen.QrSegment.make_bytes(golden0.encode("UTF-8")),
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qrcodegen.QrSegment.make_numeric(golden1),
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qrcodegen.QrSegment.make_alphanumeric(golden2)]
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qr = qrcodegen.encode_segments(segs, qrcodegen.QrCode.Ecc.LOW)
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print_qr(qr)
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# ---- Utilities ----
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def print_qr(qrcode):
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"""Prints the given QrCode object to the console."""
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border = 4
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for y in range(-border, qrcode.get_size() + border):
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for x in range(-border, qrcode.get_size() + border):
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print(u"\u2588 "[qrcode.get_module(x,y)] * 2, end="")
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print()
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print()
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# Run the main program
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if __name__ == "__main__":
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main()
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