gistfile1.py

import argparse

class _SubParsersAction(argparse._SubParsersAction):

    def __init__(self, *args, **kwargs):
        super(_SubParsersAction, self).__init__(*args, **kwargs)

        self._other_actions = []

    def add_parser(self, name, **kwargs):
        if 'help' not in kwargs:
            choice_action = self._ChoicesPseudoAction(name, '')
            self._choices_actions.append(choice_action)

        return super(_SubParsersAction, self).add_parser(name, **kwargs)

    def _get_subactions(self):
        return sorted(self._choices_actions, key=lambda x: x.dest)

class CommandFormatter(argparse.HelpFormatter):
    def _format_args(self, action, default_metavar):
        if isinstance(action, argparse._SubParsersAction):
            return '{command}'
        else:
            return super(CommandFormatter, self)._format_args(action, default_metavar)

    def _metavar_formatter(self, action, default_metavar):
        # noinspection PyUnusedLocal
        def format_subparser(tuple_size):
            return '',

        if isinstance(action, argparse._SubParsersAction):
            return format_subparser
        else:
            return super(CommandFormatter, self)._metavar_formatter(action, default_metavar)


class ArgumentParser(argparse.ArgumentParser):
    """
    Strict argument parser.
    Disabled quessing names.
    """
    def __init__(self, **kwargs):
        kwargs['formatter_class'] = CommandFormatter
        super(ArgumentParser, self).__init__(**kwargs)

        self.register('action', 'parsers', _SubParsersAction)


    def _get_option_tuples(self, option_string):
        return []