Ping not working

[zhiephie]

I'm use 2 options for connect with ping, but not working

1. def __init__(self):
       if self._db_connection is None:
           self._db_connection = MySQLdb.connect(
               host=config.mysqlhost,
               user=config.mysqluser,
               passwd=config.mysqlpass,
               db=config.mysqldbnm
           )
           self._db_cur = self._db_connection.cursor()
       else:
           self._db_connection.ping(True)

2. def __open(self):
       try:
           if self.__connection is None:
               cnx = MySQLdb.connect(self.__host, self.__user,
                                   self.__password, self.__database)
               self.__connection = cnx
               self._db_cur = cnx.cursor()
           else:
               self.__connection.ping(True)
   
       except MySQLdb.Error as e:
          print "Error %d: %s" % (e.args[0], e.args[1])