QRコードを大量に作るPythonプログラム

# -*- coding: utf-8 -*-
import qrcode
from qrcode.image.styledpil import StyledPilImage
#from qrcode.image.styles.moduledrawers.pil import RoundedModuleDrawer
#from qrcode.image.styles.colormasks import RadialGradiantColorMask
from qrcode.image.styles import colormasks, moduledrawers

#img_1 = qr.make_image(image_factory=StyledPilImage, module_drawer=RoundedModuleDrawer())
#img_2 = qr.make_image(image_factory=StyledPilImage, color_mask=RadialGradiantColorMask())
#img_3 = qr.make_image(image_factory=StyledPilImage, embeded_image_path="/path/to/image.png")
def generate_qr_code(data, filename):
    qr = qrcode.QRCode(
        version=1,
        #version=40,
        error_correction=qrcode.constants.ERROR_CORRECT_L,
        #error_correction=qrcode.constants.ERROR_CORRECT_M,
        #error_correction=qrcode.constants.ERROR_CORRECT_Q,
        #error_correction=qrcode.constants.ERROR_CORRECT_H,
        #mask_pattern=3,
        box_size=20,
        border=2,
    )
    qr.add_data(data.encode('utf-8'))  # 日本語文字列をUTF-8エンコーディングで処理
    #qr.make(fit=True)
    img = qr.make_image(image_factory=StyledPilImage, 
                        #
                        module_drawer=moduledrawers.SquareModuleDrawer()
                        #module_drawer=moduledrawers.RoundedModuleDrawer()
                        #module_drawer=moduledrawers.CircleModuleDrawer()
                        #module_drawer=moduledrawers.GappedSquareModuleDrawer()
                        #module_drawer=moduledrawers.HorizontalBarsDrawer()
                        #module_drawer=moduledrawers.VerticalBarsDrawer()
                        
                        )

    #img = qr.make_image(fill_color="black", back_color="white")
    img.save(filename)

def read_file(file_path):
    with open(file_path, 'r', encoding='utf-8') as file:  # ファイルをUTF-8エンコーディングで読み込み
        return file.readlines()

def main():
    file_path = "a.txt"  # 入力ファイル名を固定化
    lines = read_file(file_path)

    for index, line in enumerate(lines):
        line = line.strip()
        if line:
            output_filename = f"dat/"+(str(index).zfill(3))+f".png"  # 出力ファイル名を固定化
            generate_qr_code(line, output_filename)
            print(f"QR code '{output_filename}' generated successfully!")

if __name__ == '__main__':
    main()