Contact Book Flask Application

A simple web-based contact book application built with Flask that allows users to add and view contact information.

Features

• Add new contacts with name and email
• View all submitted contacts in a list below the form
• Simple and clean web interface
• Form validation for required fields
• Hungarian language interface

File Structure

contact_book/
├── app.py          # Main Flask application
└── index.html      # HTML template for the web interface

Requirements

• Python 3.x
• Flask

Installation and Usage

1. Clone or download this repository
2. Navigate to the project directory
3. Install Flask:

   pip install flask

4. Navigate to the contact_book directory:

   cd contact_book

5. Run the Flask application:

   python app.py

6. Open your web browser and go to:

   http://localhost:5000
   

7. Use the form to add contacts:
   • Enter a name in the "Név" field
   • Enter an email address in the "Email" field
   • Click "Hozzáadás" (Add) to submit

Application Details

Backend (app.py)

The Flask application includes:

• A single route (/) that handles both GET and POST requests
• In-memory storage for contacts using a Python list
• Form data processing for name and email fields

Frontend (index.html)

The HTML template features:

• Simple form with name and email input fields
• Form validation (required fields)
• Display of all submitted contacts in a list below the form
• Hungarian language labels and interface

Data Flow

1. User visits the homepage (GET request)
2. Flask renders the index.html template
3. User fills out the form and submits (POST request)
4. Flask processes the form data and adds it to the contacts list
5. Flask rerenders the index.html template with the updated contacts list