Simple Python Expense Tracker Engine

Overview

This repository contains a lightweight Expense Tracker Application built using Python and Flask. The project demonstrates core data processing concepts—managing real-time mathematical accumulation, persistent numerical ledgers, and input validation.

Engineering Architecture

• Accumulator Logic: Implements robust mathematical state management to aggregate continuous transaction inputs.
• Decoupled Architecture: Clean separation of backend accumulation logic (app.py) and UI rendering (templates/index.html).
• Disk Persistence Layer: Saves all accumulated numerical data into a structured expenses_data.json file.
• Safe Termination Protocol: Supports direct browser-triggered server shutdowns.

Repository File Structure

├── app.py                  # Core Backend Processing Layer
├── expenses_data.json      # Permanent Disk Storage
└── templates/              # View Layer Directory
    └── index.html          # Web User Interface

To use the Expense Tracker application, you can follow these steps:

1. Install the necessary dependencies by running the following command:

pip install flask

2. Clone the repository:

Bash
git clone <repository_url>

3. Navigate to the project directory:

Bash
cd python-flask-expensetracker

4. Run the application using Python:

Bash
python app.py