Pip accelerated mirroring
It will be very slow for pip to connect to the official image. Here we use Aliyun's pip image.
Create a new directory: / root/.pip
Create a new file: / root/.pip/pip.conf
Add the following to pip.conf:
[global]
Timeout = 600,
Index.url = http://mirrors.aliyun.com/pypi/simple
Trusted-host = mirrors.aliyun.com