OOP Library Management System

📚 Introduction: From Objects to Systems

After learning how to model simple objects with classes, the next step is learning how objects interact to form a system.

This notebook introduces an OOP-based Library Management System, applying object-oriented principles to represent books, libraries, and actions such as borrowing and returning. It’s a meaningful step from isolated classes to coordinated behaviour.

This is where OOP starts to feel practical.

---

🎯 Purpose: Applying OOP to Real Scenarios

The goal of this notebook is to help learners understand how to:

• Model real-world entities as classes
• Separate responsibilities across objects
• Use methods to control system behaviour
• Manage state through object interactions

Rather than focusing on syntax, this notebook focuses on design thinking.

---

🧠 How It Works: Object Interactions

At a high level, the system is designed around multiple objects:

1. A Book class to represent individual books
2. A Library class to manage collections of books
3. Methods to borrow and return books
4. Internal state tracking for availability

Each object has a clear role, and the system emerges from their interaction.

---

🧩 The Technical Part: Classes and Responsibilities

A simplified version of the structure looks like this:

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

class Library:
    def __init__(self):
        self.books = []

    def borrow_book(self, title):
        for book in self.books:
            if book.title == title and not book.is_borrowed:
                book.is_borrowed = True
                print("Book borrowed")
                return
        print("Book not available")

🔍 What This Demonstrates

• 🧱 Classes encapsulate both data and behaviour
• 🔁 Objects collaborate to enforce rules
• 🧠 State lives inside objects, not global variables
• 🛠 Methods act as controlled entry points

This mirrors how backend systems are structured.

---

💡 Key Takeaways: Why OOP Shines Here

This notebook reinforces key object-oriented ideas:

• 📦 Objects represent real-world entities
• 🧭 Responsibilities are clearly defined
• 🔄 State changes are controlled and predictable
• 🧠 Systems become easier to extend and reason about

This is exactly why OOP is widely used in large applications.

---

🏁 Conclusion: Designing with Objects

The OOP Library Management System represents a major conceptual shift:

You’re no longer just writing code — you’re designing a system of collaborating objects.

With this foundation, learners are ready to explore:

• Inheritance (e.g. different book types)
• User objects and permissions
• Persistence (saving data)
• Full application architectures

This notebook is a strong signal of software design maturity.

---

🔗 Link to Notebook

Notebook link: Coming Soon