Statelessness requirement in Rest API - Mini Project: Build & Apply

Statelessness Requirement in REST API

📖 Scenario: You are building a simple REST API for a book store. The API should follow the statelessness principle, which means each request from the client must contain all the information needed to process it. The server should not remember anything about previous requests.

🎯 Goal: Create a REST API endpoint that returns book details based on a book ID sent in the request. The API must not store any client session or state between requests.

📋 What You'll Learn

Create a dictionary called books with three books and their details

Create a variable called requested_book_id to simulate the client sending a book ID

Write a function called get_book_details that takes book_id as input and returns the book details from books

Print the result of calling get_book_details with requested_book_id

💡 Why This Matters

🌍 Real World

Statelessness is a key rule in REST APIs to make sure each request is independent. This helps servers handle many clients easily and reliably.

💼 Career

Understanding statelessness is important for backend developers and API designers to build scalable and maintainable web services.

1

Create the books data

Create a dictionary called books with these exact entries: 1: {'title': '1984', 'author': 'George Orwell'}, 2: {'title': 'To Kill a Mockingbird', 'author': 'Harper Lee'}, 3: {'title': 'The Great Gatsby', 'author': 'F. Scott Fitzgerald'}

Rest API

# Create the books dictionary with 3 books
# Your code here

Need a hint?

Use a dictionary with integer keys and dictionary values for book details.

2

Simulate client request with book ID

Create a variable called requested_book_id and set it to 2 to simulate the client sending a book ID in the request

Rest API

books = {
    1: {'title': '1984', 'author': 'George Orwell'},
    2: {'title': 'To Kill a Mockingbird', 'author': 'Harper Lee'},
    3: {'title': 'The Great Gatsby', 'author': 'F. Scott Fitzgerald'}
}
# Create requested_book_id variable and set it to 2
# Your code here

Need a hint?

Just assign the number 2 to requested_book_id.

3

Write the function to get book details

Write a function called get_book_details that takes a parameter book_id and returns the book details from the books dictionary using book_id

Rest API

def get_book_details(book_id):
    return books.get(book_id, 'Book not found')
# Print the book details below

Need a hint?

Use the dictionary get method to safely get the book details or a default message.

4

Print the book details for the requested book

Print the result of calling get_book_details with requested_book_id

Rest API

Need a hint?

Use print(get_book_details(requested_book_id)) to show the book details.