Real-world modeling using objects in Python - Mini Project: Build & Apply

Real-world modeling using objects

📖 Scenario: You are creating a simple program to keep track of books in a library. Each book has a title, an author, and a year it was published.

🎯 Goal: Build a program that models books as objects, stores them in a list, and prints details of each book.

📋 What You'll Learn

Create a class called Book with attributes title, author, and year

Create a list called library to hold Book objects

Add three Book objects to the library list with exact details

Use a for loop to print the details of each book in the format: Title by Author (Year)

💡 Why This Matters

🌍 Real World

Modeling real-world items like books helps organize and manage data in software such as library systems or inventory apps.

💼 Career

Understanding how to create and use classes is essential for software development jobs that involve object-oriented programming and data modeling.

1

Create the Book class

Create a class called Book with an __init__ method that takes title, author, and year as parameters and assigns them to instance variables with the same names.

Python

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

Need a hint?

Use class Book: to start the class. Inside, define def __init__(self, title, author, year): and assign the parameters to self.title, self.author, and self.year.

2

Create the library list and add books

Create a list called library. Add three Book objects to it with these exact details: "The Hobbit", "J.R.R. Tolkien", 1937, "1984", "George Orwell", 1949, and "To Kill a Mockingbird", "Harper Lee", 1960.

Python

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

# Create the library list and add three Book objects
# Your code here

Need a hint?

Create a list named library and add three Book objects using the exact titles, authors, and years given.

3

Write a loop to print book details

Use a for loop with variables book to iterate over the library list. Inside the loop, create a string in the format Title by Author (Year) using the book object's attributes.

Python

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

library = [
    Book("The Hobbit", "J.R.R. Tolkien", 1937),
    Book("1984", "George Orwell", 1949),
    Book("To Kill a Mockingbird", "Harper Lee", 1960)
]

# Use a for loop to create a string for each book in the format: Title by Author (Year)
# Your code here

Need a hint?

Use for book in library: to loop. Inside, use an f-string to format the book's title, author, and year.

4

Print the book details

Inside the for loop, add a print statement to display the details string for each book.

Python

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

library = [
    Book("The Hobbit", "J.R.R. Tolkien", 1937),
    Book("1984", "George Orwell", 1949),
    Book("To Kill a Mockingbird", "Harper Lee", 1960)
]

for book in library:
    details = f"{book.title} by {book.author} ({book.year})"
    # Print the details string
    # Your code here

Need a hint?

Use print(details) inside the loop to show each book's information.