Comment 38 for bug 1306991

Same issue in (K)ubuntu 14.04.2 LTS (using python 2.7)
In my case an old requests version 1.2.3 was sitting in my user folder,
so the following solved the issue for me:

rm -rf ~/.local/lib/python2.7/site-packages/requests-1.2.3.egg-info ~/.local/lib/python2.7/site-packages/requests

Thanks Muelli, however I do *not* recomment the find approach: im my case it matched files from other packages as well