convert images to webp format

convert_to_webp.py

import os
from PIL import Image
from optparse import OptionParser

"""
  Convert to webp

  This script convert image(s) to webp format
  - Accepts png, jpg, jpeg formats
  - Given an image, converts image to webp
  - Given a folder, converts images in that folder to webp

  usage: python3 convert_to_webp.py <foldername|filename> [options]

  options:
  -l, --lossless        Use lossless compression (default lossy)
  -e, --exact           Preserve transparent rgb values (default false)
  -q, --quality=<int>   0-100 quality for lossy, 0-100 speed for lossless, (default 80)

  read docs for more info
  https://pillow.readthedocs.io/en/stable/handbook/image-file-formats.html#webp
"""


def parse_args():
    usage = "usage: %prog <foldername|filename> [options]"

    parser = OptionParser(usage)
    parser.add_option("-l", "--lossless",
                      action="store_true",
                      default=False,
                      dest="lossless",
                      help="Use lossless compression (default lossy)"
                      )
    parser.add_option("-e", "--exact",
                      action="store_true",
                      default=False,
                      dest="exact",
                      help="Preserve transparent rgb values (default false)"
                      )
    parser.add_option("-q", "--quality",
                      action="store",
                      type="int",
                      default=80,
                      dest="quality",
                      help="0-100 quality for lossy, 0-100 speed for lossless, (default 80)"
                      )

    (options, args) = parser.parse_args()

    if len(args) != 1:
        parser.error("incorrect number of arguments")

    return (options, args)


def get_destination(source):
    return os.path.splitext(source)[0] + ".webp"


def convert_to_webp(source, options):
    image = Image.open(source)

    destination = get_destination(source)
    exif_data = image.getexif()

    image.save(
        fp = destination,
        format = "webp",
        exif = exif_data,
        lossless = options.lossless,
        exact = options.exact,
        quality = options.quality
    )

    return destination


def main():
    (options, args) = parse_args()
    file_path = args[0]
    if (os.path.isfile(file_path)):
        new_path = convert_to_webp(file_path, options)
        print(new_path)
    else:
        for file in os.listdir(file_path):
            if (file.endswith(tuple([".png", ".jpg", ".jpeg"]))):
                new_path = convert_to_webp(f"{file_path}/{file}", options)
                print(new_path)


if __name__ == '__main__':
    main()