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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)')))

Maelig
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Cluf
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  • Does this answer your question? [pip install fails with "connection error: \[SSL: CERTIFICATE\_VERIFY\_FAILED\] certificate verify failed (\_ssl.c:598)"](https://stackoverflow.com/questions/25981703/pip-install-fails-with-connection-error-ssl-certificate-verify-failed-certi) – Jeril Oct 12 '20 at 05:21

3 Answers3

9

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
Jeril
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  • Thanks for your help @Jeril. Curiously, this command allows pip to work on my personal Mac, but not my work computer running Windows 10. I still get the 'Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1122' error. Tried it in Git Bash to see if it was a CMD vs. bash issue, but doesn't work in either case. Could it be a firewall issue from my company? – Cluf Oct 13 '20 at 02:26
  • Maybe because of the firewall in your company, you need to download it locally and try. I generally download windows python libraries from [here](https://www.lfd.uci.edu/~gohlke/pythonlibs/) – Jeril Oct 13 '20 at 08:04
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    U finally saved me. Thank you very much – CcMango Jun 30 '21 at 04:48
  • @CcMango Glad it helped – Jeril Jun 30 '21 at 14:42
  • How to confirm if this is firewall issue? I need to provide evidence to company's Network team as they dont go by our development software environment issue as their issue. If there is any way to pinpoint the error is due to firewall setting. – Adil Mar 09 '22 at 18:22
4

Pandas is a PyPI repo. It means that it stores in the PyPI servers. If you can't pip install it, it means that your pip doesn't trust PyPI as a "Python package authority".

What can you do:

To solve the issue, I would have added PyPI to the list of trusted hosts, from which you can pip install stuff.

  1. Make sure you have pip.conf file:

    in windows: %HOME%\pip\pip.ini

    in Linux: $HOME/.pip/pip.conf

  2. Make the file looks like this:

    [global]
    trusted-host = pypi.python.org

Then run:

pip install pandas
Oz Shabat
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0

If you have installed the latest version of Cisco Any Connect try to uninstall Cisco Umbrella module.

Sergey Sheremet
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