What is abstract class inheritance in programming?

What is abstract class inheritance in programming?

Abstract class inheritance is a way to define a base class that cannot be instantiated on its own, but can be inherited by subclasses.

Can you give me an example of an abstract class?

Sure! In Python, you can use the abc module to create an abstract class. For example:

from abc import ABC, abstractmethod

class Animal(ABC):
    @abstractmethod
    def sound(self):
        pass

How do subclasses implement the abstract methods?

Subclasses must provide concrete implementations for all abstract methods defined in the abstract class. For example:

class Dog(Animal):
    def sound(self):
        return 'Bark'

What happens if a subclass doesn't implement the abstract methods?

If a subclass does not implement all abstract methods, it cannot be instantiated and will raise a TypeError.