1. encountered questions like when uninstall or upgrade package:
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.
Solve : find "XXX.egg-info" file in the installation path, and then delete it. Before proceeding back later uninstall or upgrade package.
2. encountered similar problems when the install:
ERROR: Could not install packages due to an EnvironmentError: [WinError 5] 拒绝访问。
Consider using the `--user` option or check the permissions.
Solve : Add '--user' to face in the last pip statements, such as:
pip install XXX --user
3. update a single package
pip install --upgrade XXX
4. unload a package
pip uninstall XXX