1.错误背景

在使用pip install rasa-core时出现的问题，问题为：Cannot uninstall greenlet.it is a distuils installed project and thus we cannot accurately determine which file belong to it which would lead to only a partial uninstall.

2.解决方案

pip3 install --ignore-installed greenlet

遇到类似问题可以把greenlet替换为对应模块名