Inheritance Basics

Learning Objectives Define polymorphism and method overriding in the context of inheritance. Explain the 'is-a' relationship between a superclass and a subclass. Implement a simple class hierarchy with one superclass and at least two subclasses. Use the `super()` keyword to call a parent class's constructor from a child class. Override a method from a parent class to provide specialized behavior in a child class. Differentiate between a base class (parent) and a derived class (child). Ever wonder how a video game can have a general 'Enemy' class, but also specific 'Goblin' and 'Dragon' enemies that attack differently? 🧙‍♂️🐉 This lesson explores how inheritance allows us to build specialized classes from general ones. You'l...

TermDefinitionExample Superclass (Parent/Base Class)The general class that other classes inherit from. It contains common attributes and methods that are shared by its children.An `Animal` class could be a superclass for `Dog` and `Cat`. Subclass (Child/Derived Class)The specialized class that inherits attributes and methods from a superclass. It can also have its own unique properties and behaviors.A `Dog` class is a subclass of the `Animal` class. It inherits properties like `name` but might have a unique method like `bark()`. 'is-a' RelationshipThe fundamental principle of inheritance. A subclass 'is-a' more specific type of its superclass.A `Car` 'is-a' `Vehicle`. A `Square` 'is-a' `Shape`. This helps you decide when to use inheritance. Method O...

Inheritance Syntax class SubclassName(SuperclassName): To make one class inherit from another, you place the superclass's name in parentheses after the subclass's name during its definition. Calling the Parent Constructor super().__init__(parent_arguments) Inside the subclass's `__init__` method, this is the first line you should write. It ensures that all the setup from the parent class is completed before adding the subclass's specific attributes. Method Overriding Pattern def method_name(self, parameters): # New, specialized code here To override a method, simply define a method in the subclass with the exact same name and parameters as the one in the superclass. The subclass's version will be used for its objects.