为 pip install 设置 socks5 代理
参考
How to use pip with socks proxy?
为 pip install 设置 socks5 代理
设置方法：
pip install pysocks
pip install -r requirements.txt --proxy='socks5://127.0.0.1:1080'
2019.1
To improve is to change, to be perfect is to change often.
