Set correct type for _subparsersaction.choices (#2702)
Set correct type for _subparsersaction.choices (#2702)

choices=_name_parser_map, see https://github.com/python/cpython/blob/a11d44056e4f9b64d28efec295e1c1c45d4cb9e1/Lib/argparse.py#L1097
euresti/typeshed