If you are not able to upgrade your Python version to 2.7.9, and want to suppress warnings,
you can downgrade your 'requests' version to 2.5.3:
sudo pip install requests==2.5.3
About version: http://fossies.org/diffs/requests/2.5.3_vs_2.6.0/requests/packages/urllib3/util/ssl_.py-diff.html