📦 Classes and Objects in Python
Basics of Object-Oriented Programming
🔹 What is a Class?A class is like a blueprint or template used to create objects. It defines what data (variables) and actions (methods) an object will have.
✅ Why Use Classes and Objects?
- Organizes code properly
- Represents real-world entities
- Improves code reusability
- Makes programs clean and manageable
📌 Simple Definition of Class
👉 A class is a user-defined blueprint that is used to create objects.
📌 Real-Life Example
The idea of a car (color, model, speed) = Class
A real car (Red BMW, Blue Audi) = Object
📌 What is an Object?
An object is a real instance of a class. Each object has its own data but follows the same structure of the class.
📘 Example Program (Class and Object in Python)
# Creating a class
class Student:
def __init__(self, name, age):
self.name = name
self.age = age
def show_details(self):
print("Name:", self.name)
print("Age:", self.age)
# Creating objects
student1 = Student("Aman", 20)
student2 = Student("Riya", 22)
# Calling methods
student1.show_details()
student2.show_details()
📂 Key Concepts Used
🔹 Important Terms
- class → creates a blueprint
- __init__() → constructor
- self → refers to current object
- object → instance of class
📊 Difference Between Class and Object
- Class → Blueprint / Design
- Object → Real instance
- Class → Logical entity
- Object → Physical entity
📚 FAQs on Class and Object
Q1. What is a class?
A class is a blueprint used to create objects.
Q2. What is an object?
An object is an instance of a class.
Q3. Can we create multiple objects from one class?
Yes, multiple objects can be created from the same class.
Q4. What is self in Python?
self refers to the current object.
Q5. Is memory allocated for class?
No, memory is allocated when objects are created.
🔑 Key Points to Remember
- Class is a blueprint
- Object is a real instance
- Multiple objects can be created
- Supports code reusability