qr_code.py

# /// script
# requires-python = ">=3.12"
# dependencies = [
#     "qrcode[pil]",
#     "pillow",
# ]
# ///

import qrcode
from PIL import Image

# URL to encode in the QR code
url = "https://gist.github.com/kolibril13/5e241265e8823b982199f294cc2e0084"

# Create QR code instance
qr = qrcode.QRCode(
    version=1,
    error_correction=qrcode.constants.ERROR_CORRECT_L,
    box_size=10,
    border=4,
)

# Add data to the QR code
qr.add_data(url)
qr.make(fit=True)

# Create QR code image with white background first
qr_img = qr.make_image(fill_color="black", back_color="white")

# Convert to RGBA mode to support transparency
qr_img = qr_img.convert("RGBA")

# Make white pixels transparent
data = qr_img.getdata()
new_data = []
for item in data:
    # Change all white (255, 255, 255) pixels to transparent
    if item[:3] == (255, 255, 255):
        new_data.append((255, 255, 255, 0))  # Transparent
    else:
        new_data.append(item)

qr_img.putdata(new_data)

# Save the QR code as PNG with transparency
qr_img.save("qr_code_transparent.png", "PNG")

print(f"QR code generated for URL: {url}")
print("Saved as: qr_code_transparent.png")
print("The QR code has a transparent background.")