import argparse

class MyParsersAction(argparse._SubParsersAction):

    def add_parser(self, name, **kwargs):
        # set prog from the existing prefix
        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')
            if help != argparse.SUPPRESS:
                choice_action = self._ChoicesPseudoAction(name, aliases, help)
                self._choices_actions.append(choice_action)
        else:
            help = ''

        # build a metavar that excluses SUPPRESSed parsers
        # these names still appear in error messages
        if not hasattr(self, 'choices_list'):
            self.choices_list = []
        if help != argparse.SUPPRESS:
            self.choices_list.append(name)
            for a in aliases:
                self.choices_list.append(a)
        self.metavar = '{%s}' % ','.join(self.choices_list)

        # 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

if __name__ == '__main__':        
    parser = argparse.ArgumentParser()
    parser.register('action', 'parsers', MyParsersAction)

    parser.add_argument('--foo', help='foo help')
    sub_parsers = parser.add_subparsers(dest='commands', title='subcommands')
    sub_parser = sub_parsers.add_parser('sub-command-1', aliases=('sub1',),help='sub-command-1 help')
    sub_parser = sub_parsers.add_parser('sub-command-2', aliases=('sub2',),help=argparse.SUPPRESS)
    sub_parser = sub_parsers.add_parser('sub-command-3', aliases=('sub3',))

    parser.print_help()
    import sys
    if sys.argv[1:]:
        args = parser.parse_args()
    else:
        args = parser.parse_args('--foo test sub-command-1'.split())
    print(args)
    
"""
1946:~/mypy$ python3 issue22848.py
usage: issue22848.py [-h] [--foo FOO]
                     {sub-command-1,sub1,sub-command-3,sub3} ...

optional arguments:
  -h, --help            show this help message and exit
  --foo FOO             foo help

subcommands:
  {sub-command-1,sub1,sub-command-3,sub3}
    sub-command-1 (sub1)
                        sub-command-1 help
Namespace(commands='sub-command-1', foo='test')
"""