2022-07-22 pip3的国内安装源

1，清华源

pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple virtualen

2，豆瓣源

pip3 install -i https://pypi.douban.com/simple requests

转自https://www.cnblogs.com/kaishirenshi/p/11751342.html