*Classes & Objects in Python*

Object-Oriented Programming helps you:

- Model real-world entities
- Group data + behavior together
- Write clean, scalable, and reusable code


*What is a Class?*

A class is a blueprint for creating objects (instances).
It defines attributes (variables) and methods (functions).


class Person:
def __init__(self, name, age): Constructor
self.name = name Attribute
self.age = age

def greet(self): Method
print(fHello, I'm self.name and I'm self.age years old.)


*What is an Object?*

An object is an instance of a class.

p1 = Person(Alice, 25)
p1.greet()
Output: Hello, I'm Alice and I'm 25 years old.


*What is ___init___?*

It’s the constructor method in Python.
It runs automatically when you create a new object and is used to initialize attributes.

*Mini Project: Student Grade Tracker*

class Student:
def __init__(self, name):
self.name = name
self.grades = []

def add_grade(self, grade):
self.grades.append(grade)

def average(self):
if self.grades:
return sum(self.grades) / len(self.grades)
return 0

def report(self):
print(fself.name's Average Grade: self.average():.2f)

Usage
s1 = Student(David)
s1.add_grade(85)
s1.add_grade(92)
s1.add_grade(78)
s1.report()


*Output:*

David's Average Grade: 85.00


*OOP Concepts Practiced* :

- Class and object creation
- Initializing attributes with __init__
- Using methods to manipulate internal data