参考：

更新pip时报错：Read Timeout Error

解决pip ReadTimeoutError问题

问题：在Mac OSX系统下使用pip install时报错：

ReadTimeoutError: HTTPSConnectionPool(host='pypi.python.org', port=443): Read timed out.
           

解决方法：加大超时时间：

pip --default-timeout=100 install -U pip
           

2017.11

To improve is to change, to be perfect is to change often.