All You Need To Know About Data Classes in Python https://jerrynsh.com/all-you-need-to-know-about-data-classes-in-python/

classes.py

class Car:
    def __init__(self, name: str, brand: str, price: int) -> None:
        self.name = name
        self.brand = brand
        self.price = price


car1 = Car('Model X', 'Tesla', 120_000)
car2 = Car('Model X', 'Tesla', 120_000)

car1 == car2 # False. We need to write our own __eq__ method to handle this.

dataclass1.py

from dataclasses import dataclass, field

@dataclass
class Car:
    name: str = field(compare=False)  # To exclude this field from comparison
    brand: str = field(repr=False)  # To hide fields in __repr__
    price: int = 120_000
    condition: str = field(default='New')

dataclass2.py

from dataclasses import dataclass, field

@dataclass
class Car:
    name: str = field(compare=False)
    brand: str = field(repr=False)
    price: int = 120_000
    condition: str = field(default='New')

    def __post_init__(self):
        if self.condition == "Old":
            self.price -= 30_000

old_car = Car('Model X', 'Tesla', 130_000, 'Old')
# Car(name='Model X', price=100000, condition='Old')

dataclass3.py

# ...
from typing import List

@dataclass
class CarDealer:
    cars: List[Car]


car3 = Car('Model S', 'Tesla', 89_000)
car4 = Car('Model Y', 'Tesla', 54_000)
car_dealer = CarDealer(cars=[car3, car4])
# CarDealer(cars=[Car(name='Model S', price=89000, condition='New'), Car(name='Model Y', price=54000, condition='New')])

dataclasses.py

from dataclasses import dataclass

@dataclass
class Car:
    name: str # Supports typing out of the box!
    brand: str
    price: int

car1 = Car('Model X', 'Tesla', 120_000)
car2 = Car('Model X', 'Tesla', 120_000)

car1 == car2 # True. __eq__ is generated automatically.

car2.name # Supports dot annotation!

namedtuple.py

from collections import namedtuple

Car = namedtuple('Car', ['name', 'brand', 'price'])
car = Car('Model X', 'Tesla', 120_000)

tupledict.py

# Using Dictionary
car = {"name": "Model X", "brand": "Tesla", "price": 120_000}

# OR using Tuple
car = ("Model X", "Tesla", 120_000)