What is an object in Python?

In Python, an object is an instance of a class. It represents a real-world entity with attributes (data/properties) and behavior (methods/functions) defined by its class. Everything in Python is an object, including numbers, strings, lists, and even functions.

A class is like a blueprint, and an object is a tangible entity created from that blueprint.

Example: #

# Define a class
class Employee:
    def __init__(self, name, salary):
        self.name = name
        self.salary = salary

    def work(self):
        print(f"{self.name} is working.")

# Create objects (instances of the class)
emp1 = Employee("Aswini", 5000)
emp2 = Employee("Kumar", 10000)

# Access attributes and methods
print(emp1.name)       # Aswini
emp2.work()            # Kumar is working.

Here:

• Employee → class (blueprint)
• emp1 and emp2 → objects (instances) of the Employee class

Key Points about Objects #

1. Encapsulation: Objects hold their own data (name, salary) and methods (work()), keeping them self-contained.
2. Identity, Type, Value: Each object has:
   • Identity → unique identifier in memory (id(obj))
   • Type → the class it belongs to (type(obj))
   • Value → the data it holds
3. Dynamic: Python objects can have attributes added, modified, or deleted at runtime.

Real-World Example #

In a library management system:

• Class → Book
• Object → book1 with attributes like title="Python 101" and author="Aswini"
• Methods → issue(), return_book()

This approach makes the system modular, reusable, and easy to scale.