Dataclasses, introduced in Python 3.7 (and backported to Python 3.6), provide a handy, less verbose way to create classes. Many of the common things you do in a class, like instantiating ...

I don't want to dwell on how all of this works, including inner functions and Python's scoping rules. I do, however, want to ask the question "how can you use Mypy to check all of this?" You could ...