ArgumentParser.set_defaults(**kwargs)
Most of the time, the attributes of the object returned by parse_args() will be fully determined by inspecting the command-line arguments and the argument actions. set_defaults() allows some additional attributes that are determined without any inspection of the command line to be added:
1 2 3 4 5 | >>> parser = argparse.ArgumentParser()>>> parser.add_argument('foo', type=int)>>> parser.set_defaults(bar=42, baz='badger')>>> parser.parse_args(['736'])Namespace(bar=42, baz='badger', foo=736) |
Note that parser-level defaults always override argument-level defaults:
1 2 3 4 5 | >>> parser = argparse.ArgumentParser()>>> parser.add_argument('--foo', default='bar')>>> parser.set_defaults(foo='spam')>>> parser.parse_args([])Namespace(foo='spam') |
Parser-level defaults can be particularly useful when working with multiple parsers. See the add_subparsers() method for an example of this type.
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