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...
📚 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
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Tags: Python, Python tutorial, Python for beginners, learn Python, abstract classes, operator overloading, ABC, abstractmethod, dunder
methods, add, str, OOP, Python basics, CelesteAI
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