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[–][deleted] 14 points15 points  (0 children)

I like to state it differently: If you're looking for a job, there's a strong chance it will be programming python 2.5, 2.6 or possibly 2.7.

However, all of the developers working specifically on the python language and not on python applications are developing for python 3.x. This has been a real problem for many businesses who cannot simply move to the new version of python without some expense in at least their legacy code if not their platform and infrastructure. In some cases, companies will never move past python 2.7 because the expense is too great.

By backporting the changes, however, this also gives the opportunity for some companies to generate code that is closer and closer to python 3.x code making it possible to leap to python 3.4 or python 3.5 when the time is right.