Pdf download issue failed network error

This might be related to stackoverflow. The server uses the same kind of certificate chain with multiple trust path. See there which cafile you might need to use for verification. This error also occurs on Python 3. This explains the situation. You should probably ask how to validate the certificate provided by the domain.

Show 6 more comments. Active Oldest Votes. Improve this answer. Ioannis Filippidis 8, 8 8 gold badges 69 69 silver badges bronze badges. Craig Glennie Craig Glennie 4, 1 1 gold badge 13 13 silver badges 6 6 bronze badges.

I'm using macOS Sierra Python 3. Show 23 more comments. There is an advised opt out which isn't dissimilar to my advice above: import ssl This restores the same behavior as before.

Please note with this as stated in the PEP: This guidance is aimed primarily at system administrators that wish to adopt newer versions of Python that implement this PEP in legacy environments that do not yet support certificate verification on HTTPS connections. Asclepius Noelkd Noelkd 7, 2 2 gold badges 27 27 silver badges 43 43 bronze badges. So if this error is keeping me from using setup.

As ours is an intranet site for HP printers You first method is the least desirable one - bypass validation. Why is the one that actually validates the certificate not listed first? So for me what worked was updating to most recent version of certifi and updating openssl on the boxes. Show 2 more comments. To expand on Craig Glennie's answer: in Python 3. This does not in fact fix the issue on Python 3. If using the command line freaks you out probably not if you're here, but hey , you can also find the Applications folder or equivalent on other OSes that Python created on installation, then open the script by double-clicking.

Specific name of the folder depends on the version of Python you installed. Worked like a charm for Python 3. Thank you. I literally searched for 's of solutions and yours worked. Add a comment. Save the file and enjoy requests! Bruno Gabuzomeu Bruno Gabuzomeu 7 7 silver badges 8 8 bronze badges. And the question is about urllib2 not requests — Kevin Smyth. Worked on Debian. Unfortunately python requests does not use any operating system's CA trust store.

Works on Windows 10, Python 3. My solution was to pip install certifi to install certifi , which has Then, in my code where I previously just had: import urllib. Saim Ehsan 21 6 6 bronze badges.

See the ssl docs for more info. See edit; ok? This is the answer. Worked like charm in Mac OS X. In the words of an old colleague Tried several other solutions: this worked on Chris Halcrow Chris Halcrow I suspect that disabling all HTTP verification for all of python is a bit excessive to deal with one error in verification.

There are a lot of cases in which one might want verification by default. Worked for me on Windows Server on python 2. I normally don't have python installed on windows servers but needed it for a vCenter upgrade with Nexus v migration to VDS, and this just fixes the problem with a self-signed vCenter cert for the time being will use VMCA and valid certs in upgraded environment.

I had no luck getting the cert to be accepted by editing the cacert. Also, I set the variable directly in command line window before running the script, so it won't be disabling all checks like someone-or-other are afraid of, which I too wouldn't recommend. That's perfect for my use case: testing. I would never do this on production, but for running tests which have nothing to do with SSL, that's a wonderful option.

Thanks, this solution did it for me: import os os. Prostak Prostak 3, 7 7 gold badges 33 33 silver badges 44 44 bronze badges. Finally it worked. It's not necessary that Python 3. This should be the accepted answer. You should never ever do such monkeypatching. Serge Stroobandt Serge Stroobandt 3, 1 1 gold badge 37 37 silver badges 50 50 bronze badges.

This solved my issue with in bionic, cheers. The following command resolved my issue from this answer pip install --upgrade pip. RTbecard RTbecard 3 3 silver badges 10 10 bronze badges. Thanks, upgrading setuptools also did not work for me. But upgrading pip solves the problem. But I actually already have these three installed, to their newest version The Overflow Blog.

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