It is NOT a different language. It's not backwards compatible, sure, but usually, only minor changes are required and 2to3 helps a lot. At this point, pretty mu

It is NOT a different language. It's not backwards compatible, sure, but usually, only minor changes are required and 2to3 helps a lot. At this point, pretty much all of the libraries are ported and their API stays the same. The libraries which haven't been ported yet are either notable exceptions (Twisted!) or are unmaintained. Very helpful for porting: http://python-future.org http://python-future.org