I'm quite a python noob but I need python2.7, should I bother or go directly to 3.4: http://213.128.137.28/showthread.php?t=91777&page=3

Besides that, what's the best way to build/install a module for python2.7 or 3.4?
I need some third-party modules that aren't here yet, but I am not really familiar with python and it's modules but would like to make a try and if I succeed, the community is one module richer ^^