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Add subparser aliases for argparse. Resolves issue 9324. Approved by Georg for beta2 on the tracker.

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Steven Bethard 2010-12-18 11:19:23 +00:00
parent 04129748ae
commit fd311a712d
5 changed files with 77 additions and 6 deletions
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17
Lib/argparse.py
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@ -1023,9 +1023,13 @@ class _SubParsersAction(Action):
class _ChoicesPseudoAction(Action):
def __init__(self, name, help):
def __init__(self, name, aliases, help):
metavar = dest = name
if aliases:
metavar += ' (%s)' % ', '.join(aliases)
sup = super(_SubParsersAction._ChoicesPseudoAction, self)
sup.__init__(option_strings=[], dest=name, help=help)
sup.__init__(option_strings=[], dest=dest, help=help,
metavar=metavar)
def __init__(self,
option_strings,
@ -1053,15 +1057,22 @@ class _SubParsersAction(Action):
if kwargs.get('prog') is None:
kwargs['prog'] = '%s %s' % (self._prog_prefix, name)
aliases = kwargs.pop('aliases', ())
# create a pseudo-action to hold the choice help
if 'help' in kwargs:
help = kwargs.pop('help')
choice_action = self._ChoicesPseudoAction(name, help)
choice_action = self._ChoicesPseudoAction(name, aliases, help)
self._choices_actions.append(choice_action)
# create the parser and add it to the map
parser = self._parser_class(**kwargs)
self._name_parser_map[name] = parser
# make parser available under aliases also
for alias in aliases:
self._name_parser_map[alias] = parser
return parser
def _get_subactions(self):