OOP – Polymorphism

OOP – Polymorphism\n\nPolymorphism means “many forms”. Different classes can be used interchangeably if they implement the same interface or method signature.\n\npython\nclass Shape:\n def area(self):\n raise NotImplementedError\n\nclass Square(Shape):\n def __init__(self, side):\n self.side = side\n def area(self):\n return self.side * self.side\n\nclass Circle(Shape):\n def __init__(self, radius):\n self.radius = radius\n def area(self):\n import math\n return math.pi * self.radius ** 2\n\nshapes = [Square(3), Circle(2)]\nfor s in shapes:\n print('Area:', s.area())\n\n\nBoth Square and Circle implement area(), allowing the loop to treat them uniformly.\n