====== Barcode, Datamatrix, QR Code ======

===== Code 39 =====

Package :
  * [[https://pypi.org/project/pybarcodes/]]

Installation :

<code bash>
pip install pybarcodes
</code>

Utilisation :

<code python>
from pybarcodes import CODE39

barcode = CODE39("HELLO-WORLD")
barcode.save("myimage.png")
</code>

===== Code 128 =====

Package :
  * [[https://pypi.org/project/code128/]]

Installation :

<code bash>
pip install code128
</code>

Utilisation :

<code python>
import code128

code128.image("Hello World").save("hello.png")
</code>



===== DataMatrix =====

Docs:
  * Package **pylibdmtx**
    * [[https://pypi.org/project/pylibdmtx/]]
    * [[https://github.com/NaturalHistoryMuseum/pylibdmtx/]]
  * Librairie **libdmtx**
    * [[http://libdmtx.sourceforge.net/]]
    * [[https://github.com/dmtx]]

Installer la librairie **libdmtx** sur le système :

<code bash>
sudo apt install libdmtx0b
</code>

Installer les packages Python :

<code bash>
pip install pylibdmtx
pip install pillow
</code>

Générer un Datamatrix :

<code python>
from pylibdmtx.pylibdmtx import encode
from PIL import Image

encoded = encode("Hello world !".encode('utf8'))
img = Image.frombytes('RGB', (encoded.width, encoded.height), encoded.pixels)
img.save("example.png")
</code>

===== QR Code =====

Source: [[https://www.youtube.com/watch?v=y9VXWsU3FSE]]

Package :
  * [[https://pypi.org/project/qrcode/]]

Installation :

<code bash>
pip install qrcode
pip install pillow
</code>

Génération simple d'un QR Code :

<code python>
import qrcode

img = qrcode.make("Bonjour tout le monde !")
img.save("exemple.png")
</code>

Génération d'un QR Code personnalisé :

<code python>
import qrcode

qr = qrcode.QRCode(
    box_size=20,
    border=10
)
qr.add_data("Hello world !")
qr.make(fit=True)

img = qr.make_image(fill_color="blue", back_color="white")
img.save("example.png")
</code>