This method sends a ROLLBACK statement to the MySQL server, undoing all data changes from the current transaction. By default, Connector/Python does not autocommit, so it is possible to cancel transactions when using transactional storage engines such as InnoDB.

>>> cursor.execute("INSERT INTO employees (first_name) VALUES (%s), (%s)", ('Jane', 'Mary'))
>>> cnx.rollback()

To commit modifications, see the commit() method.