【学习笔记】pip3 安装使用国内源

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

pip3 install matplotlib -i https://pypi.mirrors.ustc.edu.cn/simple/
pip3 install numpy -i https://pypi.mirrors.ustc.edu.cn/simple/

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