QR Code image generator
Project description
This module uses the Python Imaging Library (PIL) to allow for the generation of QR Codes.
What is a QR Code?
A Quick Response code is a two-dimensional pictographic code used for its fast readability and comparatively large storage capacity. The code consists of black modules arranged in a square pattern on a white background. The information encoded can be made up of any kind of data (e.g., binary, alphanumeric, or Kanji symbols)
Usage
Use the make shortcut function:
import qrcode img = qrcode.make('Some data here')
Advanced Usage
For more control, use the QRCode class. For example:
import qrcode qr = qrcode.QRCode( version=1, error_correction=constants.ERROR_CORRECT_L, box_size=10, ) qr.add_data('Some data') qr.make(fit=True) img = qr.make_image()
The version parameter is an integer from 1 to 40 that controls the size of the QR Code (the smallest, version 1, is a 21x21 matrix). Set to None and use the fit parameter when making the code to determine this automatically.
The error_correction parameter controls the error correction used for the QR Code. The following four constants are made available on the qrcode package:
- ERROR_CORRECT_L
About 7% or less errors can be corrected.
- ERROR_CORRECT_M (default)
About 15% or less errors can be corrected.
- ERROR_CORRECT_Q
About 25% or less errors can be corrected.
- ERROR_CORRECT_H.
About 30% or less errors can be corrected.
The box_size parameter controls how many pixels each “box” of the QR code is.
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