Default values are defined here.

def handle_args():
    """
    Default values are defined here.
    """
    default_database_name = dbconfig.testdb_corpus_url.database
    parser = argparse.ArgumentParser(
        prog=os.path.basename(__file__),
        formatter_class=argparse.ArgumentDefaultsHelpFormatter)

    parser.add_argument('dbname',
                        nargs='?',
                        default=str(default_database_name),
                        help='Database name',
                        )
    return parser.parse_args()