import argparse
class CsvListAction(argparse.Action):
    """
    argparse Action to convert "a,b,c" into ["a", "b", "c"]
    """
    def __call__(self, parser, namespace, values, option_string=None):
        # Conversion to dict removes duplicates while preserving order
        items = list(dict.fromkeys(values.split(",")).keys())
        setattr(namespace, self.dest, items)
parser = argparse.ArgumentParser(description="Testing")
parser.add_argument("directory", type=str, help="path to find files")
parser.add_argument(
    "--output",
    type=str,
    help="name of output file to produce",
)
name_args_group = parser.add_mutually_exclusive_group()
name_args_group.add_argument(
    "--name-exclude",
    action=CsvListAction,
    help="Comma-separated set of name ID(s) to exclude",
)
name_args_group.add_argument(
    "--name-include",
    action=CsvListAction,
    help="Comma-separated set of name ID(s) to include",
)
parser.add_argument(
    "--path-exclude",
    action=CsvListAction,
    default=[],
    help="Comma-separated set of UNIX glob patterns to exclude",
)
parser.add_argument(
    "--path-include",
    action=CsvListAction,
    default=[],
    help="Comma-separated set of UNIX glob patterns to include",
)
parser.parse_args()