升级pip后，出现异常，导致无法进行任何的pip相关的操作。网上找了很多教程，都无效，后来经过反复摸索，问题解决了。
尝试方案1：
Python中更新pip失败导致损坏的修复_老鱼干的博客-CSDN博客_python3修复pip
运行提示没有pip模块
PS C:\Users\86176> pip install –upgrade pip
Traceback (most recent call last):
File “d:\program files\python38\lib\runpy.py”, line 194, in _run_module_as_main
return _run_code(code, main_globals, None,
File “d:\program files\python38\lib\runpy.py”, line 87, in _run_code
exec(code, run_globals)
File “D:\Program Files\Python38\Scripts\pip.exe\__main__.py”, line 4, in <module>
ModuleNotFoundError: No module named ‘pip’
解决办法
执行
python -m ensurepip,python -m pip install –upgrade pip
即可
PS C:\Users\86176>
python -m ensurepip
Looking in links: c:\Users\86176\AppData\Local\Temp\tmpjplwmax8
Requirement already satisfied: setuptools in d:\program files\python38\lib\site-packages (49.2.1)
Processing c:\users\86176\appdata\local\temp\tmpjplwmax8\pip-20.2.1-py2.py3-none-any.whl
Installing collected packages: pip
Successfully installed pip-20.2.1
PS C:\Users\86176>
PS C:\Users\86176>
python -m pip install –upgrade pip
Looking in indexes: https://pypi.douban.com/simple
Collecting pip
Using cached https://pypi.doubanio.com/packages/7c/02/9ab8b431aca1b46fcc1ac830a5870a28a12ba1abfa681904b1d2da876a86/pip-21.2.1-py3-none-any.whl (1.6 MB)
Installing collected packages: pip
Attempting uninstall: pip
Found existing installation: pip 20.2.1
Uninstalling pip-20.2.1:
Successfully uninstalled pip-20.2.1
Successfully installed pip-21.2.1
测试
PS C:\Users\86176>
pip list
方案1验证无效
方案2
找到之前安装OK的版本，进入 D:\Python\Lib\site-packages\ 路径，找到
pip
和
pip-22.1.2.dist-info
目录，将其复制到对应的路径下，问题解决。