id="design-pattDesign Patterns Tutorial with Python Examples
Design patterns are reusable solutions to common software design problems. They help improve code readability, maintainability, and scalability. In this tutorial, we'll cover 10 design patterns with Python code examples and discuss when to use them. 1. Singleton Pattern Use the Singleton pattern when you want only one instance of a class throughout the application. class Singleton : _instance = None @classmethod def get_instance (cls) : if not cls._instance: cls._instance = cls() return cls._instance 2. Factory Pattern Use the Factory pattern when you need to create objects without specifying the exact class. class Dog : def speak ( self ) : return "Woof!" class Cat : def speak ( self ) : return "Meow!" class AnimalFactory : def create_animal ( self , animal_type) : if animal_type == "dog" : return Dog() elif animal_type == ...