Monday, June 7, 2021

Python PIP Upgrade or Install Fails : SSL: CERTIFICATE_VERIFY_FAILED behind Proxy

If you're behind a proxy or getting these errors when installing or upgrading python packages or PIP itself

python -m pip install --upgrade pip

WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1123)'))': /simple/pip/


Then try these extra parameters to trust Python sites (only do this if you trust the proxy)

python -m pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org --upgrade pip

Collecting pip

  Downloading pip-21.1.2-py3-none-any.whl (1.5 MB)

     |████████████████████████████████| 1.5 MB 1.3 MB/s

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