“未知的MySQL服务器主机'192.12xx.xxx.xxx”是什么意思？

Question

我无法使用Python连接远程服务器MySQL。

first.py

#!/usr/bin/python
import MySQLdb
import second

DBHostname = second.hostname
DBuser = second.user
DBPWD = second.passwd
DB = second.db

dbcon = MySQLdb.connect(host=DBHostname,user=DBuser,passwd=DBPWD,db=DB)
dbcur = dbcon.cursor()
try:
    dbcur.execute("select * from push_time where userid = %s", (e100075))
    data = dbcur.fetchall() #Fetch all of the rows from query
    for row in data : #Get Data's
        wait_time = row[2]
        print wait_time
        dbcon.commit()
except:
    dbcon.close()

second.py

#!/usr/bin/python

hostname = "192.12XX.XXX.XXX"
user = "user"
passwd = "password"
db = "dbname"

运行此程序后，我收到以下错误：

_mysql_exceptions.OperationalError: (2005, "Unknown MySQL server host '192.XXXX.XXX.XXX' (2)")

我做错了什么？