This module uses the Python Imaging Library (PIL) to allow for the generation of QR Codes.
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)
Use the make shortcut function:
import qrcode
img = qrcode.make('Some data here')
For more control, use the QRCode class. For example:
import qrcode
qr = qrcode.QRCode(
version=1,
error_correction=qrcode.constants.ERROR_CORRECT_L,
box_size=10,
border=4,
)
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.
The border parameter controls how many boxes thick the border should be
(the default is 4, which is the minimum according to the specs).