qrtest.py

# Takes any arbitray data, splits it into multiple peices and encode into QR code.

# python-qrcode package can be obtained from https://github.com/lincolnloop/python-qrcode
import qrcode
import base64

from multiprocessing import Pool

BLOCK_SIZE = 100 # in bytes

# TODO: Is it possible to get rid of these?
data = open("IMG_5526.jpg").read()
n = len(data)

def gen(seq, data):
    qr = qrcode.QRCode(
        version=1,
        error_correction=qrcode.constants.ERROR_CORRECT_L,
        box_size=8,
        border=1,
    )
    qr.add_data(data)
    qr.make(fit=True)

    img = qr.make_image()

    print 'Generating %05d.png' % seq
    img.save('qrcode-output/%05d.png' % seq)

def seq(i):
    # Lower bound (inclusive) and upper bound (exclusive)
    lb, ub = i*BLOCK_SIZE, min((i+1)*BLOCK_SIZE, n)
    gen(i, data[lb:ub])

def main():
    seqs = range(0, n/BLOCK_SIZE+1)
    pool = Pool(processes=4)
    pool.map(seq, seqs)

if __name__ == '__main__':
    main()