pip更新导致ImportError: cannot import name ‘InvalidSchemeCombination‘ from ‘pip._internal.exceptions‘

由于更新pip，一直出现错误：ImportError: cannot import name ‘InvalidSchemeCombination’ from ‘pip._internal.exceptions’

报错原因：pip文件损坏

解决方法可参考：https://blog.csdn.net/weixin_40040107/article/details/102581918

仍然报错的话需要：卸载anaconda，重装：
https://www.cnblogs.com/studylyn/p/7718472.html

https://blog.csdn.net/qq_40605139/article/details/95249601

anaconda重新安装：https://blog.csdn.net/qq_32649321/article/details/115554168?spm=1001.2014.3001.5501