ModuleNotFoundError：没有名为“ pip._internal”的模块

Question

当我执行任何pip命令时，都会出现错误“ ModuleNotFoundError：没有名为'pip._internal”的模块

我已经用“ get-pip”安装了pip，并且一起重新安装了python。

Traceback (most recent call last):
  File "c:\users\user\appdata\local\programs\python\python37\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\users\user\appdata\local\programs\python\python37\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\user\AppData\Local\Programs\Python\Python37\Scripts\pip.exe\__main__.py", line 5, in <module>
ModuleNotFoundError: No module named 'pip._internal'