def _idx_table_by_num(tables):
    """
    Switch tables to index-by-number

    :param dict tables: Metadata
    :return list _tables: Metadata
    """
    logger_jsons.info("enter idx_table_by_num")
    _tables = []
    for name, table in tables.items():
        try:
            # Get the modified table data
            tmp = _idx_col_by_num(table)
            # Append it to the growing calibrated age list of tables
            _tables.append(tmp)
        except Exception as e:
            logger_jsons.error("idx_table_by_num: {}".format(e))
    logger_jsons.info("exit idx_table_by_num")
    return _tables
Switch tables to index-by-number

    :param dict tables: Metadata
    :return list _tables: Metadata