ModuleNotFoundError: No module named pip

問題：

更新pip後，舊版本被卸載了，但是新版本沒有安裝好。

使用pip時報錯：

ModuleNotFoundError: No module named 'pip'

處理：

分別執行以下兩條命令：
 

python -m ensurepip
python -m pip install --upgrade pip

執行結果： 

C:\Windows\system32>python -m ensurepip
Looking in links: C:\Users\ZHANGS~1\AppData\Local\Temp\tmpg9nh4bl0
Requirement already satisfied: setuptools in d:\programfiles\python\lib\site-packages (39.0.1)
Collecting pip
Installing collected packages: pip
Successfully installed pip-10.0.1

C:\Windows\system32>python -m pip install --upgrade pip
Collecting pip
  Using cached https://files.pythonhosted.org/packages/43/84/23ed6a1796480a6f1a2d38f2802901d078266bda38388954d01d3f2e821d/pip-20.1.1-py2.py3-none-any.whl
Installing collected packages: pip
  Found existing installation: pip 10.0.1
    Uninstalling pip-10.0.1:
      Successfully uninstalled pip-10.0.1
Successfully installed pip-20.1.1
You are using pip version 20.1.1, however version 20.2b1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.