cmd/grayscale.py

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Python
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import argparse
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import PIL.Image
import sys
from voussoirkit import pathclass
from voussoirkit import pipeable
from voussoirkit import winglob
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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:
return grayscale(filename, inplace=args.inplace)
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def main(argv):
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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)
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if __name__ == '__main__':
raise SystemExit(main(sys.argv[1:]))