python 连接mysql 执行命令

import MySQLdb

from x_zabbix import ZabbixTools

db_host = cf.get("zabbix_db", "db_host")

        db_user = cf.get("zabbix_db", "db_user")

        db_password = cf.get("zabbix_db", "db_password")

        db_name = cf.get("zabbix_db", "db_name")

        conn = MySQLdb.connect(host=db_host, user=db_user, passwd=db_password, db=db_name, charset="utf8")

        cursor = conn.cursor()

        cursor.execute("select * from history_uint where itemid=23660 order by clock desc limit 1;")

        online = cursor.fetchall()

        conn.close()