Mercurial > hg > configuration
view example/argparse_undefined.py @ 141:c6aea14a3e2b
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author | Jeff Hammel <k0scist@gmail.com> |
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date | Mon, 01 Dec 2014 18:05:50 -0800 |
parents | 30abbd61ea5e |
children | efd2d3330296 |
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#!/usr/bin/env python """ illustrate which options are parsed with argparse """ import argparse import sys class Undefined(object): """singleton""" Undefined = Undefined() class UndefinedArgumentParser(argparse.ArgumentParser): def add_argument(self, *args, **kwargs): kwargs.setdefault('default', Undefined) return argparse.ArgumentParser.add_argument def main(args=sys.argv[1:]): parser = UndefinedArgumentParser() parser.add_argument('--foo', dest='foo', help="foo") if __name__ == '__main__': main()