import sys
from PIL import Image
from pydmtx import DataMatrix

if __name__ == '__main__':
    dmtx_image = Image.open(sys.argv[1])
    (width, height) = dmtx_image.size
    dm_read = DataMatrix()
    dmtx_code = dm_read.decode (width, height, buffer(dmtx_image.tostring()))
    if dmtx_code is not None:
        print "Found Datamatrix code '%s' in %s" % (dmtx_code, sys.argv[1])
    else:
        print "No Datamatrix code found in %s" % (sys.argv[1])