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Python-Zint is a ctypes interface to libzint of Robin Stuart's Zint project:

<http://www.zint.org.uk/>

<https://zint.github.io>

Usage closely follows the C API:

<http://www.zint.org.uk/Manual.aspx?type=p&page=5>

Example #1

Generate a QRCode saved to file out.png:

import zint
import sys

symbol = zint.ZBarcode_Create()
symbol.contents.symbology = zint.BARCODE_QRCODE
symbol.contents.scale = 2.5
symbol.contents.option_1 = 4
symbol.contents.border_width = 4
input = zint.instr(b'https://github.com/jmptbl/python-zint')
if zint.ZBarcode_Encode_and_Print(symbol, input, 0, 0) != 0:
    print('error: %s' % symbol.contents.errtxt)
    sys.exit(1)
zint.ZBarcode_Delete(symbol)

Result

sample/out.png?raw=true

Example #2

Generate a QRCode in memory only:

import zint
import sys

symbol = zint.ZBarcode_Create()
symbol.contents.symbology = zint.BARCODE_QRCODE
symbol.contents.scale = 0.01
symbol.contents.option_1 = 4
symbol.contents.border_width = 0
input = zint.instr(b'https://github.com/jmptbl/python-zint')
if zint.ZBarcode_Encode_and_Buffer(symbol, input, 0, 0) != 0:
    print('error: %s' % symbol.contents.errtxt)
    sys.exit(1)
bitmap = zint.bitmapbuf(symbol)
pixel = 0
for y in range(symbol.contents.bitmap_height):
    line = ''
    for x in range(symbol.contents.bitmap_width):
        # Each pixel represented by a 3 byte
        # RGB value
        if ord(bitmap[pixel]) > 0:
            line += ' '
        else:
            line += '*'
        pixel += 3
    print(line)
zint.ZBarcode_Delete(symbol)

Result

******* *****  *     * * ** * *******
*     *  *    *** *  ** * * * *     *
* *** * *     * * **  ***  ** * *** *
* *** *  *   **  *  ** *** ** * *** *
* *** * *     ** **     *     * *** *
*     *   * *  *  * ****    * *     *
******* * * * * * * * * * * * *******
        ** *   *  **  **  ***
     **  *  ** *  ** * *      * * * *
  *  * * ** *  *     *** *    * *  *
 **********    *  **  *  **   *  ****
 **  *   ** * *  *   *    *** ** *  *
***   * **   ****** * **      ** * **
*****  * *  ***  * ***** * ***    *
***** * **    ** *     *******   * **
     * ****   ** * **  *    *  * ** *
   ****    *    * ** ** ***  ** * ***
   * * *   ***   *** **  * **     *
**  **** **** *    *** * ***   * ** *
*  **   *** **   * **** *  ***   * **
** ** * ** **  *   ** *****  **** ***
   *   *  ****   **  *  ****** *****
*    ****  ** *   *  ******* *   * **
 *** * *  * *** ****** * * *   * * **
*  * ******  *** **     **       *
*  ***    *  * ****           **  **
* *****  ** *  ***   ******** * *  **
*   *    ** ** *    ****    ** * ****
* *** ** * ** ** **   **************
        ******  *   * **** **   ** *
*******   *  * *   * **** * * * *** *
*     * *  **   **   * *   **   ** **
* *** *  *** **   **  ** ******** *
* *** *  *** *   ** **  *** * *  **
* *** *  * * *  * *      *** * *    *
*     *    ** *  **** * * * * * **  *
*******  * ****  *  ** **   *  ***  *

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Python ctypes interface to libzint

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