"SSL: CERTIFICATE_VERIFY_FAILED" error while using PIP [duplicate]

Question

Since roughly a week or two ago, I've not been able to use pip at all, as it always kicks back the following error:

ERROR: Could not install packages due to an EnvironmentError: HTTPSConnectionPool(host='files.pythonhosted.org', port=443): Max retries exceeded with url: /packages/1b/e5/552ba65835ab43e12b299458fea94ee23886125b8b8aabc91edb03f2ba65/pandas-1.1.3.tar.gz (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1122)')))

I've tested it on and off my company VPN, and even tried on my personal laptop (running Mojave, as opposed to Windows 10 on my main laptop). Both my home internet as well as a hot spot on my phone. As well, I've remoted in to one of my companie's Australian machines and was having the same problem.

I've not updated my python version (3.9.0) or pip version (20.2.3), or changed my pip usage, so just a super perplexing issue to arise suddenly. https://status.python.org/ says that everything is up too.

Is there something I am doing wrong?

Full CMD text if its helpful:

C:\Users\Caleb.Clough\Digital>pip install pandas

Collecting pandas

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: unable to get local issuer certificate (_ssl.c:1122)'))': /packages/1b/e5/552ba65835ab43e12b299458fea94ee23886125b8b8aabc91edb03f2ba65/pandas-1.1.3.tar.gz WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1122)'))': /packages/1b/e5/552ba65835ab43e12b299458fea94ee23886125b8b8aabc91edb03f2ba65/pandas-1.1.3.tar.gz

WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1122)'))': /packages/1b/e5/552ba65835ab43e12b299458fea94ee23886125b8b8aabc91edb03f2ba65/pandas-1.1.3.tar.gz

WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1122)'))': /packages/1b/e5/552ba65835ab43e12b299458fea94ee23886125b8b8aabc91edb03f2ba65/pandas-1.1.3.tar.gz

WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1122)'))': /packages/1b/e5/552ba65835ab43e12b299458fea94ee23886125b8b8aabc91edb03f2ba65/pandas-1.1.3.tar.gz

ERROR: Could not install packages due to an EnvironmentError: HTTPSConnectionPool(host='files.pythonhosted.org', port=443): Max retries exceeded with url: /packages/1b/e5/552ba65835ab43e12b299458fea94ee23886125b8b8aabc91edb03f2ba65/pandas-1.1.3.tar.gz (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1122)')))

Answer 1

Can you try the following:

$ pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org <package_name>

in your case

$ pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org pandas

You can also permanently add the trusted host to config as follows:

pip config set global.trusted-host "pypi.org files.pythonhosted.org pypi.python.org"

and use pip install the normal way

python -m pip install pandas