(mxonline) D:\Pycharm professional projects\mxonline>pip install mysqlclient-1.3.12-cp36-cp36m-win_amd64.whl
Requirement already satisfied: mysqlclient==1.3.12 from file:///D:/Pycharm%20professional%20%20projects/mxonline/mysqlclient-1.3.12-cp36-cp36m-win_amd64.whl in c:\users\scs\envs\mxonline\lib\site-packages
(mxonline) D:\Pycharm professional projects\mxonline>
为什么我是Requirement already satisfied的提示?视频里是成功安装啊?