How do I use interfaces in Python?

How do I use interfaces in Python?

In Python, interfaces can be implemented using abstract base classes (ABCs) from the abc module. Would you like an example?

Yes, please provide an example of an interface in Python.

Sure! Here's a simple example:

from abc import ABC, abstractmethod

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

class Dog(Animal):
    def sound(self):
        return 'Woof!'

class Cat(Animal):
    def sound(self):
        return 'Meow!'

In this example, Animal is an interface with an abstract method sound. Dog and Cat implement this interface.

How do I ensure that a class implements the interface?

You can ensure that a class implements the interface by inheriting from the abstract base class. If it doesn't implement all abstract methods, Python will raise a TypeError.

Can I use interfaces with multiple inheritance?

Yes, Python supports multiple inheritance. A class can implement multiple interfaces by inheriting from multiple abstract base classes.