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=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.