Package: openqr
openqrInstallingInstall and update using pip:$ pip install -U openqrIntroductionThis project aims to be the best, clearest QR Code generator library. The primary goals are flexible options and absolute correctness. Secondary goals are compact implementation size and good documentation comments.Home page with live JavaScript demo, extensive descriptions, and competitor comparisons:https://www.nayuki.io/page/qr-code-generator-libraryFeaturesCore features:Significantly shorter code but more documentation comments compared to competing librariesSupports encoding all 40 versions (sizes) and all 4 error correction levels, as per the QR Code Model 2 standardOutput format: Raw modules/pixels of the QR symbolDetects finder-like penalty patterns more accurately than other implementationsEncodes numeric and special-alphanumeric text in less space than general textOpen-source code under the permissive MIT LicenseManual parameters:User can specify minimum and maximum version numbers allowed, then library will automatically choose smallest version in the range that fits the dataUser can specify mask pattern manually, otherwise library will automatically evaluate all 8 masks and select the optimal oneUser can specify absolute error correction level, or allow the library to boost it if it doesn't increase the version numberUser can create a list of data segments manually and add ECI segmentsMore information about QR Code technology and this library's design can be found on the project home page.ExamplesExample:fromopenqrimport*# Simple operationqr0=QrCode.encode_text("Hello, world!",QrCode.Ecc.MEDIUM)svg=to_svg_str(qr0,4)# See openqr-demo# Manual operationsegs=QrSegment.make_segments("3141592653589793238462643383")qr1=QrCode.encode_segments(segs,QrCode.Ecc.HIGH,5,5,2,False)foryinrange(qr1.get_size()):forxinrange(qr1.get_size()):(...paintqr1.get_module(x,y)...)Example:fromtypingimportListfromopenqrimportQrCode,QrSegmentdefmain()->None:"""The main application program."""do_basic_demo()do_variety_demo()do_segment_demo()do_mask_demo()# ---- Demo suite ----defdo_basic_demo()->None:"""Creates a single QR Code, then prints it to the console."""text="Hello, world!"# User-supplied Unicode texterrcorlvl=QrCode.Ecc.LOW# Error correction level# Make and print the QR Code symbolqr=QrCode.encode_text(text,errcorlvl)print_qr(qr)print(to_svg_str(qr,4))defdo_variety_demo()->None:"""Creates a variety of QR Codes that exercise different features of the library, and prints each one to the console."""# Numeric mode encoding (3.33 bits per digit)qr=QrCode.encode_text("314159265358979323846264338327950288419716939937510",QrCode.Ecc.MEDIUM)print_qr(qr)# Alphanumeric mode encoding (5.5 bits per character)qr=QrCode.encode_text("DOLLAR-AMOUNT:$39.87 PERCENTAGE:100.00% OPERATIONS:+-*/",QrCode.Ecc.HIGH)print_qr(qr)# Unicode text as UTF-8qr=QrCode.encode_text("\u3053\u3093\u306B\u3061\u0077\u0061\u3001\u4E16\u754C\uFF01\u0020\u03B1\u03B2\u03B3\u03B4",QrCode.Ecc.QUARTILE)print_qr(qr)# Moderately large QR Code using longer text (from Lewis Carroll's Alice in Wonderland)qr=QrCode.encode_text("Alice was beginning to get very tired of sitting by her sister on the bank, ""and of having nothing to do: once or twice she had peeped into the book her sister was reading, ""but it had no pictures or conversations in it, 'and what is the use of a book,' thought Alice ""'without pictures or conversations?' So she was considering in her own mind (as well as she could, ""for the hot day made her feel very sleepy and stupid), whether the pleasure of making a ""daisy-chain would be worth the trouble of getting up and picking the daisies, when suddenly ""a White Rabbit with pink eyes ran close by her.",QrCode.Ecc.HIGH)print_qr(qr)defdo_segment_demo()->None:"""Creates QR Codes with manually specified segments for better compactness."""# Illustration "silver"silver0="THE SQUARE ROOT OF 2 IS 1."silver1="41421356237309504880168872420969807856967187537694807317667973799"qr=QrCode.encode_text(silver0+silver1,QrCode.Ecc.LOW)print_qr(qr)segs=[QrSegment.make_alphanumeric(silver0),QrSegment.make_numeric(silver1)]qr=QrCode.encode_segments(segs,QrCode.Ecc.LOW)print_qr(qr)# Illustration "golden"golden0="Golden ratio\u03C6= 1."golden1="6180339887498948482045868343656381177203091798057628621354486227052604628189024497072072041893911374"golden2="......"qr=QrCode.encode_text(golden0+golden1+golden2,QrCode.Ecc.LOW)print_qr(qr)segs=[QrSegment.make_bytes(golden0.encode("UTF-8")),QrSegment.make_numeric(golden1),QrSegment.make_alphanumeric(golden2)]qr=QrCode.encode_segments(segs,QrCode.Ecc.LOW)print_qr(qr)# Illustration "Madoka": kanji, kana, Cyrillic, full-width Latin, Greek charactersmadoka="\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"qr=QrCode.encode_text(madoka,QrCode.Ecc.LOW)print_qr(qr)kanjicharbits=[# Kanji mode encoding (13 bits per character)0,0,0,0,0,0,0,1,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,1,0,0,1,1,1,1,1,1,0,0,0,0,0,0,0,1,0,1,0,1,1,1,0,1,1,0,1,0,1,0,1,0,1,1,0,1,0,1,1,1,0,0,0,0,1,0,1,0,1,1,1,0,0,0,0,0,0,1,0,1,0,0,0,1,1,1,0,0,0,0,1,0,0,1,0,1,0,0,1,0,0,0,0,0,0,1,0,1,1,0,0,1,0,0,0,0,1,1,0,1,1,1,1,0,1,0,0,0,0,1,1,0,0,0,1,1,0,1,0,0,0,0,1,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,1,1,0,1,1,0,0,0,0,0,1,0,1,0,0,0,0,0,1,0,0,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,1,0,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,1,0,1,0,0,0,0,1,0,0,0,1,0,0,1,1,0,0,0,0,1,0,0,0,1,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,1,0,0,0,]segs=[QrSegment(QrSegment.Mode.KANJI,len(kanjicharbits)//13,kanjicharbits)]qr=QrCode.encode_segments(segs,QrCode.Ecc.LOW)print_qr(qr)defdo_mask_demo()->None:"""Creates QR Codes with the same size and contents but different mask patterns."""# Project Nayuki URLsegs=QrSegment.make_segments("https://www.nayuki.io/")print_qr(QrCode.encode_segments(segs,QrCode.Ecc.HIGH,mask=-1))# Automatic maskprint_qr(QrCode.encode_segments(segs,QrCode.Ecc.HIGH,mask=3))# Force mask 3# Chinese text as UTF-8segs=QrSegment.make_segments("\u7DAD\u57FA\u767E\u79D1\uFF08\u0057\u0069\u006B\u0069\u0070\u0065\u0064\u0069\u0061\uFF0C""\u8046\u807D\u0069\u002F\u02CC\u0077\u026A\u006B\u1D7B\u02C8\u0070\u0069\u02D0\u0064\u0069""\u002E\u0259\u002F\uFF09\u662F\u4E00\u500B\u81EA\u7531\u5167\u5BB9\u3001\u516C\u958B\u7DE8""\u8F2F\u4E14\u591A\u8A9E\u8A00\u7684\u7DB2\u8DEF\u767E\u79D1\u5168\u66F8\u5354\u4F5C\u8A08""\u756B")print_qr(QrCode.encode_segments(segs,QrCode.Ecc.MEDIUM,mask=0))# Force mask 0print_qr(QrCode.encode_segments(segs,QrCode.Ecc.MEDIUM,mask=1))# Force mask 1print_qr(QrCode.encode_segments(segs,QrCode.Ecc.MEDIUM,mask=5))# Force mask 5print_qr(QrCode.encode_segments(segs,QrCode.Ecc.MEDIUM,mask=7))# Force mask 7# Run the main programif__name__=="__main__":main()LinksDocumentation:https://github.com/MarkHoo/openqrPyPI Releases:https://pypi.org/project/openqr/Source Code:https://github.com/MarkHoo/openqrIssue Tracker:https://github.com/MarkHoo/openqr/issuesWebsite:https://pypi.org/project/openqr/Examples:https://github.com/nayuki/QR-Code-generator/blob/master/python/qrcodegen-demo.py