Class definition syntax in Python - Mini Project: Build & Apply

Class definition syntax

📖 Scenario: You are creating a simple program to represent a book in a library system.

🎯 Goal: Build a Python class called Book with basic details and display its information.

📋 What You'll Learn

Create a class named Book

Add an __init__ method with parameters self, title, and author

Store title and author as instance variables

Create an instance of Book with specific values

Print the book's title and author

💡 Why This Matters

🌍 Real World

Classes help organize data and behavior for real-world things like books, users, or products in software.

💼 Career

Understanding class syntax is essential for many programming jobs, especially in software development and automation.

1

Create the Book class with an __init__ method

Write a class named Book with an __init__ method that takes self, title, and author as parameters. Inside __init__, assign title to self.title and author to self.author.

Python

# Define the Book class with __init__ method
# Your code here

Need a hint?

Remember, the __init__ method sets up the object when you create it.

2

Create an instance of Book

Create a variable called my_book and assign it to a new Book object with the title 'The Great Gatsby' and author 'F. Scott Fitzgerald'.

Python

class Book:
    def __init__(self, title, author):
        self.title = title
        self.author = author

# Create an instance of Book called my_book
# Your code here

Need a hint?

Use the class name Book followed by parentheses with the title and author inside.

3

Add a method to display book info

Inside the Book class, add a method called display_info that takes only self as a parameter and returns a string in the format "Title: {self.title}, Author: {self.author}" using an f-string.

Python

class Book:
    def __init__(self, title, author):
        self.title = title
        self.author = author

    # Add display_info method here
    # Your code here

my_book = Book('The Great Gatsby', 'F. Scott Fitzgerald')

Need a hint?

Use def display_info(self): and return the formatted string with f-string syntax.

4

Print the book information

Use print to display the result of calling my_book.display_info().

Python

class Book:
    def __init__(self, title, author):
        self.title = title
        self.author = author

    def display_info(self):
        return f"Title: {self.title}, Author: {self.author}"

my_book = Book('The Great Gatsby', 'F. Scott Fitzgerald')

# Print the book info below
# Your code here

Need a hint?

Call print(my_book.display_info()) to show the book details.