def __delitem__(self, connection, key):
        """remove the item by key or raise KeyError"""
        try:
            # result intentionally ignored
            single_value_sql(
                connection,
                """SELECT app_name
                   FROM crontabber
                   WHERE
                        app_name = %s""",
                (key,)
            )
        except SQLDidNotReturnSingleValue:
            raise KeyError(key)
        # item exists
        execute_no_results(
            connection,
            """DELETE FROM crontabber
               WHERE app_name = %s""",
            (key,)
        )
def __delitem__ ( self , connection , key ) : try : single_value_sql ( connection , """SELECT app_name
                   FROM crontabber
                   WHERE
                        app_name = %s""" , ( key , ) ) except SQLDidNotReturnSingleValue : raise KeyError ( key ) execute_no_results ( connection , """DELETE FROM crontabber
               WHERE app_name = %s""" , ( key , ) )
remove the item by key or raise KeyError