dataclass

dataclasses

Neat way to declare classes, which automatically add special methods such as __init__() and __repr__().

Example

from dataclasses import dataclass

@dataclass
class InventoryItem:
    """Class for keeping track of an item in inventory."""
    name: str
    unit_price: float
    quantity_on_hand: int = 0

    def total_cost(self) -> float:
        return self.unit_price * self.quantity_on_hand

Will automatically add the below __init__():

def __init__(self, name: str, unit_price: float, quantity_on_hand: int = 0):
    self.name = name
    self.unit_price = unit_price
    self.quantity_on_hand = quantity_on_hand

Reference

Full documentation can be found at https://docs.python.org/3/library/dataclasses.html