Set up PIP domestic mirror

First create the folder pip under C:\Users\Administrator\AppData\Roaming, and then create the pip.ini file

Edit pip.ini and add content:

[global]
timeout = 60000
index-url = https://pypi.tuna.tsinghua.edu.cn/simple
[install]
use-mirrors = true
mirrors = https://pypi.tuna.tsinghua.edu.cn