Python Library Management Project 📚

Overview

This project is a simple Library Management System written in Python. It allows you to manage books using classes, objects, and JSON file storage. You can add, remove, find, count, filter, and sort books.

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Features

• Add a book with title, author, and year.
• Remove a book by title.
• Find a book by title.
• Show all books in the library.
• Count books in the library.
• Filter books by author or year.
• Sort books by title or year.
• Persistent storage using JSON file (data.json).

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Project Structure

/project
│
├─ main.py           # Main program
├─ library.py        # Classes for Book and Library
├─ commands.py       # Functions for user commands
├─ json_storage.py   # Functions to handle JSON storage
├─ data.json         # JSON file storing book data

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How to Run

1. Make sure you have Python 3 installed.
2. Run the main program:

python main.py

3. Use the following commands:

add     - add a new book
show    - show all books
find    - find a book by title
remove  - remove a book by title
count   - count books in the library
filter  - filter books by author or year
sort    - sort books by title or year
help    - show help menu
exit    - exit the program

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Example Usage

Adding a book

Enter command: add
Enter title: Dune
Enter author: Frank Herbert
Enter year: 1965
Book added successfully!

Showing all books

Enter command: show
Library collection:
1984 — George Orwell (1949)
The Master and Margarita — Mikhail Bulgakov (1967)
Dune — Frank Herbert (1965)

Finding a book

Enter command: find
Enter book title: Dune
Found: Dune — Frank Herbert (1965)

Removing a book

Enter command: remove
Enter book title: Dune
Book 'Dune' has been removed.

Filtering books

Enter command: filter
Which filter you want: by author name of author(write 'author') or  year of book(write 'year')?author
Enter author name: George Orwell
Filtered books:
1984 — George Orwell (1949)

Sorting books

Enter command: sort
Which sort you want: 'title' or 'year'?year
1984 — George Orwell (1949)
The Master and Margarita — Mikhail Bulgakov (1967)

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JSON Data Example (data.json)

[
    {
        "title": "1984",
        "author": "George Orwell",
        "year": 1949
    },
    {
        "title": "The Master and Margarita",
        "author": "Mikhail Bulgakov",
        "year": 1967
    },
    {
        "title": "Dune",
        "author": "Frank Herbert",
        "year": 1965
    }
]

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Technical Notes

• Uses OOP (Object-Oriented Programming) principles: classes, objects, methods.
• Commands are handled via functions in commands.py.
• JSON module is used for persistent storage.
• All books remain in the list and JSON file; nothing is removed from memory unless using the remove command.
• Proper error handling is implemented for missing books or invalid filters.

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Author

Bohdan Borsuk