pip更换国内源

在windows下生成一个pip.ini放在user/nenew文件夹下，pip.ini的内容是

[global]
index-url = https://mirrors.aliyun.com/pypi/simple
[install]
use-mirrors =true
mirrors =https://mirrors.aliyun.com/pypi/simple/
trusted-host =mirrors.aliyun.com