python __slots__ - Using __slots__ to Store Object Data in Python - Stack Abuse samurai 888 katsumi slot machine

What is the purpose of __slots__ in Python — especially with respect to when I would want to use it, and when not?

from dataclasses import dataclass @dataclass class SimplePosition: name: str lon: float lat: float @dataclass class SlotPosition: __slots__ = ['name', 'lon', 'lat'] name: str lon: float lat: float.

It also prevents the creation of any variables that aren't declared in __slots__ ... The point to remember is that default values for variables declared in __slots__ cannot be set using class attributes.