It's not only the compatibility that is ugly. It's also that python 2 code has a couple of ugly warts, such as the forced arguments for super(). The only way I'm supporting python 2 with my libraries is by running 3to2 and pasteurize (future package) over the python 3 source code.

I really don't want to actually have source code that works on both, it's a pain to maintain. Although the future library should make it a lot nicer, but you still need a lot of ugly from __future__ imports as well.