pydmtxlib 0.2.3

Read and write Data Matrix from Python 3.8 and above.

Forked from pylibdmtx

Read and write Data Matrix in Python 3.8+ using the libdmtx library.

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Features

• Pure Python interface for libdmtx

• Supports PIL/Pillow images, OpenCV/numpy arrays, and raw bytes

• Decodes barcode data and locations

• Minimal dependencies (only libdmtx native library required)

Installation

macOS

brew install libdmtx gettext

Linux (Ubuntu/Debian)

sudo apt-get install libdmtx0t64

Windows

Windows Python wheels do not include the required libdmtx DLLs. You need to download and add the DLLs manually to your system PATH or your project folder.

Python package

pip install pydmtxlib

Usage example

Here is a simple example demonstrating how to encode a string into a Data Matrix barcode and save it as an image, then decode it back:

from PIL import Image
from pydmtxlib import encode, decode

# Data to encode must be bytes
data = b"Hello, Data Matrix!"

# Encode the data
encoded = encode(data)

# Build a PIL image from raw pixels returned by encode()
image = Image.frombytes('RGB', (encoded.width, encoded.height), encoded.pixels)

# Save the image
image.save("datamatrix.png")
print("Data Matrix saved as 'datamatrix.png'")

# Open the saved image and decode
image = Image.open("datamatrix.png")
results = decode(image)

# Print decoded results
for result in results:
    print("Decoded data:", result.data.decode("utf-8"))