NamedTuple typing normal

area.py

from typing import NamedTuple


class FunctionNumber101(NamedTuple):
    width: float
    height: float

    def area(self):
        if self.width <= 0 or self.height <= 0:
            raise ValueError("width and height must be positive")
        return self.width * self.height

square = FunctionNumber101(10, 10)
assert square.area() == 10