High quality QR Code generator library for Python 2 and 3
Project description
Introduction
This project aims to provide the best and clearest QR Code generator library. The primary goals are flexible options and absolute correctness. The secondary goals are compact implementation size and good documentation comments.
Home page with live JavaScript demo and extensive description: https://www.nayuki.io/page/qr-code-generator-library
Features
Core features:
Available in 4 programming languages, all with nearly equal functionality: Java, JavaScript, Python, C++
Significantly shorter code but more documentation comments compared to competing libraries
Supports encoding all 40 versions (sizes) and all 4 error correction levels, as per the QR Code Model 2 standard
Output formats: Raw modules/pixels of the QR symbol, SVG XML string
Encodes numeric and special-alphanumeric text in less space than general text
Open source code under the permissive MIT License
Manual parameters:
User can specify minimum and maximum version numbers allowed, then library will automatically choose smallest version in the range that fits the data
User can specify mask pattern manually, otherwise library will automatically evaluate all 8 masks and select the optimal one
User can specify absolute error correction level, or allow the library to boost it if it doesn’t increase the version number
Usage
Install this package by downloading the source code ZIP file from PyPI, or by running pip install qrcodegen.
Examples:
from qrcodegen import * # Simple operation qr0 = QrCode.encode_text("Hello, world!", QrCode.Ecc.MEDIUM) svg = qr0.to_svg_str(4) # Manual operation segs = QrSegment.make_segments("3141592653589793238462643383") qr1 = QrCode.encode_segments(segs, QrCode.Ecc.HIGH, 5, 5, 2, False) border = 4 for y in range(-border, qr1.get_size() + border): for x in range(-border, qr1.get_size() + border): color = qr1.get_module(x, y) # 0 for white, 1 for black # (... paint the module onto pixels ...)
More complete set of examples: https://github.com/nayuki/QR-Code-generator/blob/master/python/qrcodegen-demo.py .
API documentation is in the source file itself, with a summary comment at the top: https://github.com/nayuki/QR-Code-generator/blob/master/python/qrcodegen.py .
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