How to Use abstractmethod in Python

import abc

class Shape(abc.ABC):
    @abc.abstractmethod
    def area(self):
        """Calculate area of the shape."""

    @abc.abstractmethod
    def perimeter(self):
        """Calculate perimeter of the shape."""

class Rectangle(Shape):
    def __init__(self, width, height):
        self.width = width
        self.height = height

    def area(self):
        return self.width * self.height

    def perimeter(self):
        return 2 * (self.width + self.height)

class Circle(Shape):
    def __init__(self, radius):
        self.radius = radius

    def area(self):
        return 3.14159 * self.radius ** 2

    def perimeter(self):
        return 2 * 3.14159 * self.radius

if __name__ == "__main__":
    rect = Rectangle(5, 3)
    circle = Circle(4)
    shapes = [rect, circle]
    for shape in shapes:
        print(f"{type(shape).__name__}: area={shape.area():.2f}, perimeter={shape.perimeter():.2f}")
    try:
        incomplete = Shape()
    except TypeError as e:
        print(f"Error creating Shape: {e}")