What are the best practices for using interfaces in Python?

What are the best practices for using interfaces in Python?

In Python, interfaces are typically defined using abstract base classes (ABCs). Best practices include using ABCs to enforce method implementation, keeping interfaces minimal, and ensuring they are easy to understand.

Can you give an example of an abstract base class?

Sure! Here's a simple example:

from abc import ABC, abstractmethod

class Shape(ABC):
    @abstractmethod
    def area(self):
        pass

class Circle(Shape):
    def __init__(self, radius):
        self.radius = radius

    def area(self):
        return 3.14 * self.radius ** 2

What should I avoid when designing interfaces?

Avoid making interfaces too complex or bloated. Each interface should have a clear purpose and not include unrelated methods. Also, try to avoid breaking changes once an interface is established.

How do I implement multiple interfaces in a class?

You can implement multiple interfaces by inheriting from multiple abstract base classes. For example:

class Rectangle(Shape, AnotherInterface):
    # Implement methods from both interfaces