Python 3 compatible?

[mdxs]

@dingari I noticed that there is a compat.py which hints at some Python 3 compatibility efforts, but all the print statements seem to indicate the tools is for Python 2 only. Would you accept PRs to make the tool more Python 3 compatible?

[dingari]

Hey, sure! A lot of the stuff in this repo comes from the one I originally forked from. I've always just this with Python 2. But if you want to take a stab at making it Python 3 compatible, go ahead!