decode_QRCode.py

import os
from pyzbar.pyzbar import decode
from PIL import Image

def decode_qrcodes(directory_path="./png", output_file="output.txt"):
    
    concatenated_data, max_data_length = '', 0

    # Get all PNG files in the directory and sort them
    sorted_files = sorted(
        [filename for filename in os.listdir(directory_path)],
        key=lambda x: x.split('-')[1].split('.')[0]
    )

    # Decode each QR code and concatenate the data
    for filename in sorted_files:

        file_path = os.path.join(directory_path, filename)
        decoded_data = decode(Image.open(file_path))

        if decoded_data:
            data = decoded_data[0].data.decode('utf-8')
            concatenated_data += data
            max_data_length = max(max_data_length, len(data))

    with open(output_file, 'w', encoding='utf-8') as file:
        file.write(concatenated_data)

    return max_data_length

print(f"Q2 Answer: {decode_qrcodes()} bytes")