pip config set global.index-url http://mirrors.aliyun.com/pypi/simple/
Tsinghua University
https://pypi.tuna.tsinghua.edu.cn/simple/
Ali cloud
http://mirrors.aliyun.com/pypi/simple/
China University of Science and Technology
https://pypi.mirrors.ustc.edu.cn / simple /
watercress
http://pypi.douban.cn/simple/
University of Science and Technology of China
http://pypi.mirrors.ustc.edu.cn/simple/