Part 1: Introduction & System Overview today I am excited to

Part one: Introduction and System Overview

today I am excited to present my project: Rosewood Harbor Villa, a small boutique hotel management system.

Imagine you own a small hotel. You need a way to keep track of rooms, guests, extra services like spa or breakfast, and shared facilities like swimming pools. My Python program automates all of this. It handles bookings, tracks how many nights a guest stays (up to a limit of twenty-seven nights), calculates bills, and even knows when a room needs cleaning!

Part two: Documentation and Class Diagram (Show your Class Diagram on the screen) "Before writing any code, I built a blueprint called a Class Diagram. Think of classes as digital molds or templates for real-world things. Here is how they connect: one. The Hotel Class is the big manager. It holds lists of rooms, guests, and reservations.

two. Inheritance (Family Trees): Just like you inherit traits from your parents, our rooms have a parent class called Room. From there, we branch out into StandardRoom, DeluxeRoom, and a Suite. They share basic features like a room number, but each adds its own special pricing and amenities.

three. Interfaces (The 'Promise'): We have an interface called Maintainable. Both rooms and hotel facilities (like the swimming pool) are totally different things, but they both make a 'promise' that they can be checked for maintenance and cleaned.

four. Composition and Aggregation: A Reservation owns its ServiceOrder items-if the reservation is canceled, those extra orders go away too. But a Guest can exist independently of the hotel even if they check out!

Part three: Code Walkthrough and Running the Program (Open your code and run main.py to show the output sections)

"Let's run the program and see how it uses the Four Pillars of Object-Oriented Programming: "

one. Encapsulation (Hiding and Protecting Data) look at the [ENCAPSULATION] section in the output. Explanation: "We protect our data like a locked diary. If someone tries to book twenty-eight nights (when our limit is twenty-seven), or types a fake ID like RHV-twelve instead of RHV-zero zero zero one, the program throws an error and stops bad data from getting in. Also, total prices and room availability are read-only, meaning outside code can't accidentally tamper with them."

two. Inheritance (Reusing Code) look at the [INHERITANCE] section.

Explanation: "Instead of writing pricing and features from scratch for every single room, DeluxeRoom and Suite inherit from Room. A Suite goes through a three-level chain (Room to DeluxeRoom to Suite), automatically borrowing its parent's features while adding a lounge fee and extra bedrooms."

three. Polymorphism (Many Forms) look at the [POLYMORPHISM] section.

Explanation: "Polymorphism means 'many forms.' Notice how I have a single list containing Standard, Deluxe, and Suite rooms. When I run a loop to calculate their nightly rates, I don't need to write if room is standard do this, if deluxe do that. Each room type automatically calculates its own unique price using its own nightly rate method!"

four. Abstraction (Hiding Complexity) look at the [ABSTRACTION] and run maintenance section.

Explanation: "Abstraction hides complicated background steps. When the hotel maintenance team runs run maintenance(), it loops through both hotel rooms and the swimming pool. The system doesn't need to care whether it's cleaning a bed or servicing a pool filter-it just triggers the maintenance task automatically."