解决You are using pip version 9.0.1, however version 9.0.3 is available. You should consider upgrading

You are using pip version 9.0.1, however version 9.0.3 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

解决方法：

直接运行命令：python -m pip install --upgrade pip

大功告成！