通过修改~/.pip/pip.conf
[global] index-url = https://mirrors.cloud.tencent.com/pypi/simple trusted-host = mirrors.cloud.tencent.com
通过命令（pip>=10.0.0）
pip config set global.index-url https://mirrors.cloud.tencent.com/pypi/simple
来源：https://www.cnblogs.com/locbytes/p/11416535.html