If I would have to port a code base from 2 to 3 today, I think the first thing I would do is add type annotations to to the code base via typing/mypy and go fro

If I would have to port a code base from 2 to 3 today, I think the first thing I would do is add type annotations to to the code base via typing/mypy and go from there. A fully typed Python 2 code base shouldn't be too difficult to port with the help of mypy and proper editor support.