Adding an Instance Method

from dataclasses import dataclass
from operator import methodcaller

@dataclass(slots=True, kw_only=True)
class Car:
    """Class representing car."""

    color: str
    mileage: int

    def __str__(self):
        """Returns string representation of car."""
        return f"The {self.color} car has {self.mileage:,} miles."

    def drive(self, miles: int) -> None:
        self.mileage += miles

blue_car = Car(color="blue", mileage=20_000)
red_car = Car(color="red", mileage=30_000)
white_car = Car(color="white", mileage=0)

cars = [blue_car, red_car, white_car]
get_mileage = methodcaller("drive", 100)
get_more_mileage = methodcaller("drive", 100)

for car in cars:
    get_mileage(car)
    print(car)

print()

for car in cars:
    get_more_mileage(car)
    print(car)