def METHOD_NAME(self, sql_insert, records):
    """ insert data into table using a list of lists (i.e. executemany). This should be an efficient bulk insert.
    :param records: a list of list
    :return:
    """
    try:
        c = self.conn.cursor()
        c.executemany(sql_insert, records)
        self.conn.commit()
    except Error as e:
        print(e)