This is a good writeup. On Tornado I went through a similar transition from 2to3 to a single codebase. As long as you can drop Python 2.5 support you can proba

This is a good writeup. On Tornado I went through a similar transition from 2to3 to a single codebase. As long as you can drop Python 2.5 support you can probably avoid 2to3, but if you do need it I wrote some tools to make it less painful: http://bdarnell.github.io/blog/2012/03/13/cross-python-development-with-auto2to3/ http://bdarnell.github.io/blog/2012/03/13/cross-python-devel...