e7gx / lab_modules_packages_bonus

LAB_MODULES_PACKAGES_BONUS

Library

In this exercise, you'll create a Python package named library that contains a module named librarian. The librarian module should include functions for managing books and patrons in a library system without using classes.

Follow these steps to complete the exercise:

1. Create a folder named library in your working directory.

2. Inside the library folder, create a file named __init__.py. This file is required for Python to treat the directory as a package.

3. Create a new file named librarian.py inside the library folder. In this file, define the following functions:

   • add_book(library, title, author, isbn) - takes a dictionary (library), a title (string), an author (string), and an ISBN (string) as input, and adds a new book to the library as a dictionary with the keys 'title', 'author', 'isbn', and 'available'. The 'available' key should have a boolean value, initially set to True. If the ISBN already exists in the library, print an appropriate message.

   • remove_book(library, isbn) - takes a dictionary (library) and an ISBN (string) as input, and removes the book with the given ISBN from the library. If the ISBN does not exist in the library, print an appropriate message.

   • check_out_book(library, isbn) - takes a dictionary (library) and an ISBN (string) as input, and sets the 'available' key of the book with the given ISBN to False. If the ISBN does not exist in the library or the book is not available, print an appropriate message.

   • return_book(library, isbn) - takes a dictionary (library) and an ISBN (string) as input, and sets the 'available' key of the book with the given ISBN to True. If the ISBN does not exist in the library, print an appropriate message.

   • display_books(library) - takes a dictionary (library) as input and prints all the books in the library in a formatted way.

4. Write a script named main.py in your working directory (outside the library folder) that imports and uses the librarian module from the library package to manage a simple library system.

5- use the function from librarian to add books, remove book, checout a book, and display books .

A sample output should look like this when you run main.py

The Catcher in the Rye by J.D. Salinger (ISBN: 9780316769174) - Available
To Kill a Mockingbird by Harper Lee (ISBN: 9780446310789) - Available
1984 by George Orwell (ISBN: 9780451524935) - Available

The Catcher in the Rye by J.D. Salinger (ISBN: 9780316769174) - Checked Out
To Kill a Mockingbird by Harper Lee (ISBN: 9780446310789) - Available
1984 by George Orwell (ISBN: 9780451524935) - Available

The Catcher in the Rye by J.D. Salinger (ISBN: 9780316769174) - Available
To Kill a Mockingbird by Harper Lee (ISBN: 9780446310789) - Available
1984 by George Orwell (ISBN: 9780451524935) - Available