包的安装问题——python

1. 当uninstall或者upgrade包时遇到类似下面的问题时：

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. 

 解决：在安装路径下找到“XXX.egg-info”文件，然后删除它。稍后再继续后面uninstall或者upgrade包的操作。

 2. 当install时遇到类似的问题：

ERROR: Could not install packages due to an EnvironmentError: [WinError 5] 拒绝访问。
Consider using the `--user` option or check the permissions.

 解决：在pip语句的最后面添加'--user'即可，例如：

pip install XXX --user

3. 更新单个包

pip install --upgrade XXX

4. 卸载某包

pip uninstall XXX