good first issue: python 2.7 to python 3.x #1

Good first issue: translate everything from python 2.7 to python 3.x.

Could be that it simply needs commands like:

git checkout -b py3
2to3-3.5 -w compare.py 
git diff

for each of the .py files in this repo.

But perhaps it then also needs some tweaking, because the interfaces of the libraries have had breaking changes?

We don't know - until you try.

Thanks.