Since Python's domestic network is not very stable, when we download the libraries we need, the speed is very slow, and finally it is very likely to cause overtime download.
This is where we can choose a domestic mirror to download acceleration：
pip install 包名 -i http://pypi.douban.com/simple/ --trusted-host pypi.douban.com
I chose Doubanyuan here,
--trusted-host pypi.douban.com This is to obtain ssl certificate authentication, otherwise an error will be reported
As you can see, this speed is almost impossible.
