Design Patterns in Python

Python implementation of the 23 Gang of Four design patterns with type hints and comprehensive examples.

Getting Started

Explore patterns by category using the sidebar navigation:

• Creational (5) - Object creation mechanisms
• Behavioral (11) - Object interaction and responsibility
• Structural (7) - Object composition and relationships

Quick Links

• Introduction - Core concepts and principles
• Pattern Catalog - Complete pattern reference table
• Pattern Selection Guide - Choosing the right pattern
• Quick Reference - Pattern cheat sheet

Installation

pip install -e .

Usage

from design_patterns.creational.factory import AnimalFactory
from design_patterns.behavioral.strategy import ShoppingCart, CreditCardPayment

factory = AnimalFactory()
dog = factory.get_animal("dog", "Buddy")

cart = ShoppingCart()
cart.set_payment_strategy(CreditCardPayment("1234-5678"))