pip install installation package -i http://pypi.douban.com/simple --trusted-host pypi.douban.com
On the back of the installation package for domestic installation source. high speed.
Usually Ali cloud http://mirrors.aliyun.com/pypi/simple/
China University of Science and Technology https://pypi.mirrors.ustc.edu.cn/simple/
watercress (douban) http://pypi.douban.com / simple /
Tsinghua https://pypi.tuna.tsinghua.edu.cn/simple/
University of Science and technology of China http://pypi.mirrors.ustc.edu.cn/simple/