[mortoray]

The simple syntax changes I did prior to running 2to3 as they came up on the first run I tried. The semantic changes that didn't come up in 2to3 is what I was more bothered about.

[agf]

Then you should update your post to say that, rather than saying 2to3 didn't do anything to your code.

[mkesper]

Try using some of the 2to3 fixers https://docs.python.org/2/library/2to3.html#fixers like the idioms fixer.