[mjr00]

> I understand why some who have a background in typed languages might prefer to use Python with type hints, but it should be understood that they aren't very Pythonic.

Completely disagree. The Python community has very rapidly adapted mypy because of widespread recognition that yes, type information is extremely helpful for any code bases larger than a few files and/or worked on by more than a few developers. Every major Python library I can think of now has mypy stubs available. If you're going to dismiss them as "not Pythonic" you may as well dismiss anything other than Python 2.7 as "not Pythonic".