Python dataclasses ... float shelf_id: int = 0 Once a dataclass is created it is functionally identical to a regular class. There is no performance penalty for using a dataclass.

Learn how Python's dictionary data structure works as a powerful and versatile way to store and retrieve objects and data in your applications. Programming languages all come with a variety of ...

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?" from typing import Callable def foo(x: int) -> Callable: def ...