https://www.cnblogs.com/yaradish/p/10503563.html
https://blog.csdn.net/csdn_am/article/details/79924744
更新 pip
https://www.cnblogs.com/ElegantSmile/p/10766391.html
https://www.cnblogs.com/yhongji/p/9383857.html
原文：https://www.cnblogs.com/wt7018/p/11578055.html