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bpo-23378: Add an extend action to argparse (GH-13305)

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Add an extend action to argparse


https://bugs.python.org/issue23378
This commit is contained in:
Batuhan Taşkaya 2019-05-21 20:47:42 +03:00 • committed by Miss Islington (bot)
parent d5c120f7eb
commit aa32a7e111
4 changed files with 26 additions and 0 deletions
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7
Lib/argparse.py
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@ -1154,6 +1154,12 @@ class _SubParsersAction(Action):
vars(namespace).setdefault(_UNRECOGNIZED_ARGS_ATTR, [])
getattr(namespace, _UNRECOGNIZED_ARGS_ATTR).extend(arg_strings)
class _ExtendAction(_AppendAction):
def __call__(self, parser, namespace, values, option_string=None):
items = getattr(namespace, self.dest, None)
items = _copy_items(items)
items.extend(values)
setattr(namespace, self.dest, items)
# ==============
# Type classes
@ -1262,6 +1268,7 @@ class _ActionsContainer(object):
self.register('action', 'help', _HelpAction)
self.register('action', 'version', _VersionAction)
self.register('action', 'parsers', _SubParsersAction)
self.register('action', 'extend', _ExtendAction)
# raise an exception if the conflict handler is invalid
self._get_handler()