from dataclasses import dataclass, field, asdict


@dataclass(order=True)
class City:
  name: str = field(compare=False)
  citizens: int
  area: float

zamosc = City('Zamość', 65, 30)
krakow = City('Kraków', 767, 326)
ochock = City('Ochock', 3, 400)

bigger = zamosc if zamosc > krakow else krakow
print(f'Bigger city: {bigger}')
print(sorted([zamosc, krakow, ochock]))


@dataclass
class A:
  x: int = 1
  y: int = 2


@dataclass
class B(A):
  z: int = 3
  x: int = 5

print(A())
print(B())
print(B(0, 1, 2))


@dataclass
class Product:
  size: int
  quantity: int
  price: float

p = Product(10, 1, 1.23)
print(asdict(p))