要连接mysql数据库，先要连接mysql服务器。需要先知道MYSQL服务器的IP地址和端口号。

为了连接到MySQL，需要先安装特殊的python连接器驱动。这个驱动使得可以从python与MySQL服务器对话。

1、文档说明
https://dev.mysql.com/doc/connector-python/en/

2、下载安装mysql_connector_python
https://dev.mysql.com/downloads/connector/python/

rpm -ivh mysql-connector-python-8.0.14-1.el7.x86_64.rpm

3、GUI_mysql.py
import mysql.connector as mysql

conn=mysql.connect(user='root',password='123456',host='127.0.0.1')

print(conn)

conn.close()

4、python GUI_mysql.py

(python3.5.6) [root@promote Chap07]# python GUI_mysql.py
<mysql.connector.connection.MySQLConnection object at 0x7fa76a3fe3c8>