Python source of Tsinghua pip change / update

1. Create a new pip.ini

C:\Users\Administrator\pip\pip.ini

2.pip.ini content

[global]
index-url = https://pypi.tuna.tsinghua.edu.cn/simple

3. Check pip version

pip show pip

4. After checking the version can be updated according to a similar version of the following tips pip

You are using pip version 8.1.1, however version 20.0.2 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.