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Question: 執行 upgrade pip 時發生 SSL Certificate Verify Failed 錯誤?

執行「pip install --upgrade pip」指令,準備升級 pip 版本時發生「SSL: Certificate Verify Failed」的錯誤訊息,如下圖所示:





Answer:

參考 i cannot install or upgrade pip "ssl error" · Issue #5448 · pypa/pip · GitHub 討論串,加上「--trusted-host pypi.python.org --trusted-host files.pythonhosted.org --trusted-host pypi.org」參數即可解決:
$ sudo pip install --upgrade pip --trusted-host pypi.python.org --trusted-host files.pythonhosted.org --trusted-host pypi.org


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