---
title: "Explain the Python Classes and Objects with example"  
description: "Explain the Python Classes and Objects with example"  
author: "ICSM Computer"  
published: 2025-10-02  
updated: 2025-10-23  
canonical: https://www.mindstick.com/forum/161934/explain-the-python-classes-and-objects-with-example  
category: "python"  
tags: ["python-3.4", "Python 3"]  
reading_time: 3 minutes  

---

# Explain the Python Classes and Objects with example

**[Explain](https://www.mindstick.com/forum/157854/what-is-system-debugging-explain-some-system-debugging-tools-used-in-modern-computer-systems) the [Python](https://www.mindstick.com/articles/75378/simple-yet-useful-tips-when-using-python) Classes and [Objects](https://www.mindstick.com/forum/145447/what-are-objects) with example**

## Replies

### Reply by Jk Malhotra

## 1. What is a Class?

A **class** is a blueprint for creating objects. It defines the structure (data) and behavior (functions) that the objects created from it will have.

## Example:

```python
class Dog:
    # class attribute (shared by all objects)
    species = "Canine"

    # constructor (called when creating an object)
    def __init__(self, name, age):
        self.name = name  # instance attribute
        self.age = age

    # instance method
    def bark(self):
        print(f"{self.name} says woof!")
```

## 2. What is an Object?

An **object** (also called an instance) is a real-world entity created from a class. Each object has its own unique data.

## Example:

```python
dog1 = Dog("Buddy", 3)
dog2 = Dog("Max", 5)

print(dog1.name)     # Buddy
print(dog2.age)      # 5
dog1.bark()          # Buddy says woof!
```

Each `Dog` object has its own `name` and `age`, but both share the same `species` attribute.

## 3. Class vs Instance Attributes

| Type | Definition | Example |
| --- | --- | --- |
| **Class Attribute** | Shared by all instances | `species = "Canine"` |
| **Instance Attribute** | Unique to each object | `self.name`, `self.age` |

## Example:

```python
Dog.species = "Dog"
print(dog1.species)  # Dog
```

Changing `species` in the class affects all dogs (unless overridden).

## 4. Methods in Classes

1. **Instance methods** → work with specific objects (`self`)
2. **Class methods** → work with the class itself (`cls`)
3. **Static methods** → general utility methods (don’t depend on either)

## Example:

```python
class Vehicle:
    count = 0  # class attribute

    def __init__(self, brand):
        self.brand = brand
        Vehicle.count += 1

    def show(self):
        print(f"This is a {self.brand}")

    @classmethod
    def total(cls):
        print(f"Total vehicles: {cls.count}")

    @staticmethod
    def is_motorcycle(wheels):
        return wheels == 2
```

## Usage:

```python
v1 = Vehicle("Toyota")
v2 = Vehicle("Honda")

v1.show()           # This is a Toyota
Vehicle.total()     # Total vehicles: 2
print(Vehicle.is_motorcycle(2))  # True
```

## 5. Special Methods (a.k.a. Magic or Dunder Methods)

Python classes can have “special” methods that start and end with double underscores.

| Method | Purpose |
| --- | --- |
| `__init__` | Constructor (runs when creating object) |
| `__str__` | String representation (when using `print()`) |
| `__len__` | Defines behavior for `len(obj)` |
| `__add__` | Defines behavior for `obj1 + obj2` |

## Example:

```python
class Book:
    def __init__(self, title, pages):
        self.title = title
        self.pages = pages

    def __str__(self):
        return f"Book: {self.title}"

    def __len__(self):
        return self.pages

b = Book("Python 101", 300)
print(b)        # Book: Python 101
print(len(b))   # 300
```

## 6. Inheritance (OOP Concept)

A **child class** can inherit attributes and methods from a **parent class**.

## Example:

```python
class Animal:
    def speak(self):
        print("Some sound")

class Dog(Animal):
    def speak(self):  # overriding parent method
        print("Woof!")

dog = Dog()
dog.speak()  # Woof!
```


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