1. Python 2.7 has been the standard for a *long* time.

2. Python 3 introduced major changes to the language, which many developers are unhappy with.

3. Python 2.7 will receive necessary security updates until 2020 [#pep373_eol].

4. Python 3 is continually evolving, like Python 2 did in years past.

So, you can now see why this is not such an easy decision.

.. [#iron_ver] http://ironpython.codeplex.com/releases/view/81726

.. [#pythonnet_ver] http://pythonnet.github.io/readme.html

.. [#pep373_eol] https://www.python.org/dev/peps/pep-0373/#id2