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問題描述

如果在安裝python包過程中，下載到一半，出現紅色報錯，也可以采用下邊的解決方案

Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple, https://pypi.ngc.nvidia.com WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f0121bb5890>, 'Connection to pypi.ngc.nvidia.com timed out. (connect timeout=15)')': /opencv-python/ WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f0121bb5dd0>, 'Connection to pypi.ngc.nvidia.com timed out. (connect timeout=15)')': /opencv-python/ WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f0121bc0350>, 'Connection to pypi.ngc.nvidia.com timed out. (connect timeout=15)')': /opencv-python/ WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f0121bc0790>, 'Connection to pypi.ngc.nvidia.com timed out. (connect timeout=15)')': /opencv-python/ WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f0121bc0bd0>, 'Connection to pypi.ngc.nvidia.com timed out. (connect timeout=15)')': /opencv-python/

原因分析：

pip install時報以上錯誤。

問題原因：從執行的過程來看，請求一直處于超時。這是由于國內很多情況下，無法正常去下載國外服務器資源導致。

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解決方案：

此時可以修改鏡像源，使用清華大學開源軟件鏡像站進行安裝。

#使用一下代碼 pip install -i https://pypi.tuna.tsinghua.edu.cn/simple　要下的包名

結果

?

總結

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