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From: "Joseph L. Casale" <jcasale@activenetwerx.com>
To: "'python-list@python.org'" <python-list@python.org>
Subject: Argparse defaults
Thread-Topic: Argparse defaults
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Date: Sun, 4 Jan 2015 17:58:55 +0000
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Xref: csiph.com comp.lang.python:83216

Does a facility exist to add an argument with a default being a function
that leverages the final parsed Namespace?

For example:

    group  =3D parser.add_argument_group(' some_group ')
    group.add_argument(
        '--some_group',
        nargs=3D'*',
        type=3Dstr
    )
    group.add_argument(
        '-- some_group_def',
        default=3Dfunc
    )

    args =3D parser.parse_args()

where func returns a value 'a' if args.some_group or 'b' otherwise?

Obviously I can break that out after but I am curious if the facility exist=
s?

Thanks,
jlc