Polymorphism = Greek word that means to "have many forms or faces"
Poly = Many
Morphe = Form

TWO WAYS TO ACHIEVE POLYMORPHISM
1. Inheritance = An object could be treated of the same type as a parent class
2. "Duck typing" = Object must have necessary attributes/methods

from abc import ABC, abstractmethod

class Shape(ABC):

@abstractmethod
def area(self):
pass

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

def area(self):
return 3.14 * self.radius ** 2

class Square(Shape):
def __init__(self, side):
self.side = side

def area(self):
return self.side ** 2

class Triangle(Shape):
def __init__(self, base, height):
self.base = base
self.height = height

def area(self):
return self.base * self.height * 0.5

class Pizza(Circle):
def __init__(self, topping, radius):
super().__init__(radius)
self.topping = topping

shapes = [Circle(4), Square(5), Triangle(6, 7), Pizza("pepperoni", 15)]

for shape in shapes:
print(f"{shape.area()}cm²")