Abstract Classes & Operator Overloading (ABC, Dunder Methods) - Python Tutorial for Beginners #22

Learn abstract classes and operator overloading in Python! 🧩 In this lesson, you will learn: ✅ ABC (Abstract Base Class) from the abc module ✅ @abstractmethod to enforce method contracts ✅ TypeError when forgetting abstract methods ✅ Polymorphic behavior with abstract classes ✅ Operator overloading with dunder methods ✅ __add__ for the + operator ✅ __sub__ for the - operator ✅ __eq__ for equality comparison ✅ __mul__ for scalar multiplication ✅ __len__ for the len() function ✅ __str__ and __repr__ for string display ✅ __contains__ for the 'in' operator ✅ __getitem__ for indexing with [] ✅ Mini Project: Smart Playlist System 🕐 Timestamps: 0:00 - Introduction 0:22 - Abstract Classes Explained 0:46 - Abstract Classes Demo 3:44 - Operator Overloading Explained 4:12 - Operator Overloading Demo 7:42 - Smart Playlist System Explained 8:06 - Smart Playlist System Demo 12:24 - Recap 12:59 - End 💻 Source Code: https://github.com/GoCelesteAI/python_abstract_operators 📚 Code from this lesson: # Abstract base class from abc import ABC, abstractmethod class Shape(ABC): @abstractmethod def area(self): pass class Rectangle(Shape): def area(self): return self.width * self.height # Operator overloading class Vector: def __add__(self, other): return Vector(self.x + other.x, self.y + other.y) def __str__(self): return f"Vector({self.x}, {self.y})" v1 = Vector(3, 4) v2 = Vector(1, 2) print(v1 + v2) # Vector(4, 6) 🔗 Previous: Lesson 21 - OOP Encapsulation 🔗 Next: Lesson 23 - Decorators & Class Methods #Python #PythonTutorial #LearnPython #Programming #OOP #AbstractClasses #OperatorOverloading #PythonBasics Tags: Python, Python tutorial, Python for beginners, learn Python, abstract classes, operator overloading, ABC, abstractmethod, dunder methods, add, str, OOP, Python basics, CelesteAI