I left Python learning because of Python 2 vs 3
Hello 
I had the same question because I began to learn Python 2 months ago.
So after reading some posts and informations, I decided to start with Python, 2.71, why?:
1/ Python 2.7.1 is really stable and has all the great libraries.
2/ It will be maintened for a long time for all the bugs (but not for the functions) so there will be 2.7.2 2.7.3...
3/ You may use the 3.xx syntax in your 2.7 code with the __future__ statement.
I wanted To learn how to program for the first time.
Because i`m mainly practice on IT and Security, I choose to start with Python.
But, As is started to learn Python 3, I came to realize that  Non of the modules I wanted to use were ported to Python 3, and even Django (one of the main reasons I wanted to learn python) and IronPython does not support python 3.
From my view, Python is not recommended for newbies because 1) Python 2 is about to be "out of future support" (the 2.7 is the last one). and 2) the Python 3 is not supported by the all important modules and frameworks...
So - someone who wants to learn python from scratch and not wasting time on a version that is about to be out of support (2), as no any good options (nor 2 or 3 version)...
Please correct me if I`m wrong (and before I move to C# :) ).