How do I implement an interface in Python?

How do I implement an interface in Python?

In Python, you can use abstract base classes (ABCs) from the abc module to define an interface.

Can you show me a simple example?

Sure! Here's a basic example:

from abc import ABC, abstractmethod

class MyInterface(ABC):
    @abstractmethod
    def my_method(self):
        pass

class MyClass(MyInterface):
    def my_method(self):
        return 'Hello, World!'

This defines an interface MyInterface and a class MyClass that implements it.

What happens if I don't implement the method?

If you don't implement the abstract method in the subclass, you'll get a TypeError when you try to instantiate the class.

Can I have multiple methods in an interface?

Yes, you can define multiple abstract methods in an interface, and any implementing class must provide implementations for all of them.