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Inheritance in Python

OOP Architecture

Python Inheritance

Reuse functionality safely with base classes, composition, and `super()`.

Design hierarchiesExplore multiple inheritance

Patterns​

class Notification:
    def send(self, message: str) -> None:
        raise NotImplementedError

class EmailNotification(Notification):
    def send(self, message: str) -> None:
        send_email(message)
  • Use abstract base classes to enforce required methods.
  • Prefer composition when sharing behavior doesn't require overriding.

Guidelines​

  • Keep hierarchies shallow; deep chains hinder comprehension.
  • Always call super() in overriding methods to run parent behavior.
  • Document extension points clearly (e.g., hook_ methods).

Next up in your learning path

Multiple inheritance

Combine mixins without diamond chaos.

Advanced

MRO

Understand Python's method resolution order.

Internals

Polymorphism

Leverage duck typing for flexible APIs.

Design