轉載於：https://blog.csdn.net/cxs123678/article/details/80659273

再安裝包的時候提示

You are using pip version 9.0.3, however version 10.0.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.
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而我按照要求執行python -m pip install --upgrade pip 後仍然無法成功升級，提示如下：

(venv) D:\Fish>python -m pip install --upgrade pip
Requirement already up-to-date: pip in d:\fish\venv\lib\site-packages (10.0.1)
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於是按照要求將d:\fish\venv\lib\site-packages (10.0.1) 中的pip-10.0.1.dist-info刪除，再次執行python -m pip install --upgrade pip 後升級成功，之前不能安裝的包也能安裝了！