TypeError：在CMD中调用pip时无法调用'module'对象

Question

只需安装Python。

当我在pip中呼叫Cmd时出现此错误：

Traceback (most recent call last):
  File "c:\program files\python37\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\program files\python37\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Program Files\Python37\Scripts\pip.exe\__main__.py", line 9, in <module>
TypeError: 'module' object is not callable

为什么？