背景
在使用 python MySQLdb 执行sql 命令的时候，如果执行结果含有warning，则会被写入到 stderr 展示到终端命令行。其实这些warning提示信息没有任何实际的作用。
root@rac3:~/scripts# >python set_ms.py -m 10.0.2.15:3306 -s 10.0.2.6:3308
Begin to set Replicate on slave 10.0.2.6:3308
set_ms.py:35: Warning: Slave already has been stopped
ret=cursor.execute(SQL)
set_ms.py:35: Warning: Sending passwords in plain text without SSL/TLS is extremely insecure.
ret=cursor.execute(SQL)
set_ms.py:35: Warning: Storing MySQL user nam