Introduction to OOP

Part of the Object Oriented Programming section of Coddy's Python journey — lesson 2 of 64.

Object-Oriented Programming (OOP) organizes code around objects that contain data (attributes) and functions (methods).

Create a file called car.py with a class

class Car:
    pass  # placeholder that does nothing

Create another file called driver.py to use the class

from car import Car

Create an object from the Car class

my_car = Car()

Check the type of your object

print(type(my_car))

Output:

<class 'car.Car'>

This confirms you've successfully created an object from your Car class. In OOP, a class is like a blueprint, and an object is what you build from that blueprint.

Challenge

Medium

In this challenge, you'll implement a Car class in car.py and use it in driver.py.

You need to update driver.py to import and use the Car class properly

Detailed TODO comments will guide you through each step of the implementation. The driver file contains test cases that will verify your implementation works correctly.

Cheat sheet

Object-Oriented Programming (OOP) organizes code around objects that contain data (attributes) and functions (methods).

Create a class using the class keyword:

class Car:
    pass  # placeholder that does nothing

Import a class from another file:

from car import Car

Create an object from a class:

my_car = Car()

Check the type of an object:

print(type(my_car))
# Output: <class 'car.Car'>

In OOP, a class is like a blueprint, and an object is what you build from that blueprint.

Try it yourself

from car import Car

# TODO: Create an object from the class
my_car = ?

# Print the type of my_car
print(type(my_car))

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Object Oriented Programming

1Fundamentals of OOP

External FilesIntroduction to OOPClasses vs Objects The self Parameter Methods Attributes Constructor Method (__init__)Recap - Simple Calculator

4Inheritance

Basic Inheritance The super() Function Method Overriding Multiple Inheritance Method Resolution Order Recap - Employee Hierarchy

7Special Methods

Magic Methods Introduction Operator Overloading Container Magic Methods Recap - Custom List

10Design Patterns Part 1

Intro to design pattern Singleton Pattern Factory Pattern Observer Pattern Strategy Pattern

13Final Challenges

E-learning Platform Banking System Game Character Development Vehicle Rental Service

3Class Properties

Instance vs Class Variables Property Decorators Private Attributes Recap - Bank Account Manager

6Encapsulation

Public, Protected, Private Mem Access Modifiers Information Hiding Property Decorators Advanced Recap - Student Records System

9Advanced Arguments

The *args The **kwarg

12Project: Library Management

Project Overview Book and User Classes

Borrowing System

Search Functionality

Admin Interface

Testing and Integration