Windows下Python3安装MySQL模块报错： Could not find a version that satisfies the requirement MySQLdb

环境：Windows 64位    Python 3

使用pip install MySQLdb的时候报错：

Could not find a version that satisfies the requirement MySQLdb (from versions: )
No matching distribution found for MySQLdb

百度了一下，说是Python3不支持MySQLdb模块，需要用pymysql替代

于是pip install pymysql，然而还是找不到

最后使用pip3 install pymysql终于成功了。