Python 2 is dead, long live Python 2!
https://lists.wikimedia.org/pipermail/pywikibot/2014-August/thread.html#9018
As of April 2015, the Python stats show Python 2.6 usage is greater than Python 3.3+
F3244627:
A table added to https://github.com/shazow/urllib3/issues/786 shows Python 2.6 is still the second most used version of urllib3
F3244625: