شکل‌ها و مساحت چندریخت

from abc import ABC, abstractmethod

class Shape(ABC):
    @abstractmethod
    def area(self):
        ...

class Circle(Shape):
    def __init__(self, radius):
        self.radius = radius
    def area(self):
        return 3.14159 * self.radius ** 2

class Rectangle(Shape):
    def __init__(self, w, h):
        self.w, self.h = w, h
    def area(self):
        return self.w * self.h

def total_area(shapes):
    return sum(s.area() for s in shapes)

print(f"{total_area([Circle(2), Rectangle(3, 4)]):.2f}")  # 24.57