Part 1 — Definition

A Class is like an object constructor, or a "blueprint" for creating objects. In Python, the __init__() function is a special method (Constructor) that is automatically called when a new object is created. The self parameter represents the instance of the object itself.

Part 2 — Syntax

class MyClass:
    def __init__(self, val):
        self.attr = val

obj = MyClass("Hello")

Part 3 — Example

Problem: Model a "User" with a username and a method to greet.

class User:
    def __init__(self, username):
        self.username = username

    def greet(self):
        print(f"Welcome back, {self.username}!")

u1 = User("ali_dev")
u1.greet()

Part 4 — Video

Video: Coming Soon

Part 1 — Definition

Inheritance allows us to define a class that inherits all the methods and properties from another class. The Child Class inherits from the Parent Class. Python also supports Multiple Inheritance, where a class can inherit from more than one parent.

Part 2 — Syntax

class Parent: ...
class Child(Parent): ...

Part 3 — Example

Problem: Create a generic "Animal" class and a specific "Dog" class.

class Animal:
    def speak(self):
        print("Animal makes a sound")

class Dog(Animal):
    def speak(self):
        print("Dog barks")

my_dog = Dog()
my_dog.speak() # Output: Dog barks

Observation: The child class can override methods of the parent class to provide specific behavior.

Part 4 — Video

Video: Coming Soon