pip 安装某个包出错
It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.
是说有一个库现在版本不对，需要卸载重装，但是这个库是distutils安装的，不知道直接卸载能不能正确的卸载干净。
解决
pip install xxx --ignore-installed