diff options
Diffstat (limited to 'Lib/argparse.py')
| -rw-r--r-- | Lib/argparse.py | 40 |
1 files changed, 22 insertions, 18 deletions
diff --git a/Lib/argparse.py b/Lib/argparse.py index ba9e3df3806..9a067196dac 100644 --- a/Lib/argparse.py +++ b/Lib/argparse.py @@ -1590,6 +1590,7 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer): - argument_default -- The default value for all arguments - conflict_handler -- String indicating how to handle conflicts - add_help -- Add a -h/-help option + - allow_abbrev -- Allow long options to be abbreviated unambiguously """ def __init__(self, @@ -1603,7 +1604,8 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer): fromfile_prefix_chars=None, argument_default=None, conflict_handler='error', - add_help=True): + add_help=True, + allow_abbrev=True): superinit = super(ArgumentParser, self).__init__ superinit(description=description, @@ -1621,6 +1623,7 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer): self.formatter_class = formatter_class self.fromfile_prefix_chars = fromfile_prefix_chars self.add_help = add_help + self.allow_abbrev = allow_abbrev add_group = self.add_argument_group self._positionals = add_group(_('positional arguments')) @@ -2098,23 +2101,24 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer): action = self._option_string_actions[option_string] return action, option_string, explicit_arg - # search through all possible prefixes of the option string - # and all actions in the parser for possible interpretations - option_tuples = self._get_option_tuples(arg_string) - - # if multiple actions match, the option string was ambiguous - if len(option_tuples) > 1: - options = ', '.join([option_string - for action, option_string, explicit_arg in option_tuples]) - args = {'option': arg_string, 'matches': options} - msg = _('ambiguous option: %(option)s could match %(matches)s') - self.error(msg % args) - - # if exactly one action matched, this segmentation is good, - # so return the parsed action - elif len(option_tuples) == 1: - option_tuple, = option_tuples - return option_tuple + if self.allow_abbrev: + # search through all possible prefixes of the option string + # and all actions in the parser for possible interpretations + option_tuples = self._get_option_tuples(arg_string) + + # if multiple actions match, the option string was ambiguous + if len(option_tuples) > 1: + options = ', '.join([option_string + for action, option_string, explicit_arg in option_tuples]) + args = {'option': arg_string, 'matches': options} + msg = _('ambiguous option: %(option)s could match %(matches)s') + self.error(msg % args) + + # if exactly one action matched, this segmentation is good, + # so return the parsed action + elif len(option_tuples) == 1: + option_tuple, = option_tuples + return option_tuple # if it was not found as an option, but it looks like a negative # number, it was meant to be positional |