ReadTimeoutError: HTTPSConnectionPool(host='pypi.tuna.tsinghua.edu.cn', port=443): Read timed out.

问题：安装tensorflow时报错
ReadTimeoutError: HTTPSConnectionPool(host=‘pypi.tuna.tsinghua.edu.cn’, port=443): Read timed out.

原因：
pip超时

解决办法：
pip --default-timeout=100 install numpy
pip install tensorflow

参考链接：
https://www.jianshu.com/p/8e042b7e91b6