I'm still looking for an open source python library that can decode Data-Matrix barcodes as seen on Digikey bags. Should I give up and switch to JavaScript+browser?
I just tried the example zxing-cpp Python module wrapper script and it worked with datamatrix.png from the pylibdmtx test suite. Hmm, but read_datamatrix from pylibdmtx detects two values while zxing-cpp detects one.