import argparse import PIL.Image import sys from voussoirkit import pathclass from voussoirkit import pipeable from voussoirkit import winglob def grayscale(filename, *, inplace=False): filename = pathclass.Path(filename) basename = filename.replace_extension('').basename if basename.endswith('_gray'): return if inplace: new_filename = filename else: basename += '_gray' new_filename = filename.parent.with_child(basename).add_extension(filename.extension) image = PIL.Image.open(filename.absolute_path).convert('LA') print(f'{new_filename.relative_path}') image.save(new_filename.absolute_path) def grayscale_argparse(args): filenames = winglob.glob(args.pattern) for filename in filenames: grayscale(filename, inplace=args.inplace) def main(argv): parser = argparse.ArgumentParser(description=__doc__) parser.add_argument('pattern') parser.add_argument('--inplace', dest='inplace', action='store_true') parser.set_defaults(func=grayscale_argparse) args = parser.parse_args(argv) return args.func(args) if __name__ == '__main__': raise SystemExit(main(sys.argv[1:]))