I'm sorry, but like most other python 2 vs 3 difference lists, this list is pretty much crap. It doesn't mention the most important difference: unicode "just works" in Python 3, but it's very hard to write python 2 code that works well with unicode (that is, u'blah' everywhere is nowhere near enough, because unicode + str encodes with ASCII, and every time you do something with strings, you need to check which kind of strings they are to avoid it). I have mentioned this in the README. I would however appreciate an update to the README that mentions that Python 2 will retire in about a year.

Thinking about this a bit more, maybe a python 2 to 3 porting guide might be a good idea? The porting guide could contain something like your difference list, and it could also explain the unicode problem in more detail than what I explained in the README.

I don't know why two years ago I said that your contribution is crap. Maybe that was a bad day. Thanks for trying to contribute.

Python 2 is no longer supported, and I updated README.md to say that.