Set Up the Environment First, set up a virtual environment and install the required packages.

mkdir chat-app cd chat-app python -m venv venv source venv/bin/activate # On Windows use venv\Scripts\activate pip install flask flask-socketio

chat-app/ │ ├── venv/ # Virtual environment directory ├── app.py # Flask application └── templates/ # HTML templates └── index.html # Frontend HTML file

Run Flask Application: In this project directory, run the Flask application:

python app.py

Example of Testing the Chat Application Open Tab 1:

Navigate to http://127.0.0.1:5000. You will see the chat interface. Open Tab 2:

Open another tab in the same browser or a different browser and navigate to http://127.0.0.1:5000. Send a Message from Tab 1:

Type "Hello from Tab 1!" in the input box and click "Send" or press Enter. The message "Hello from Tab 1!" should appear in the message area of both Tab 1 and Tab 2. Send a Message from Tab 2:

Type "Hello from Tab 2!" in the input box and click "Send" or press Enter. The message "Hello from Tab 2!" should appear in the message area of both Tab 1 and Tab 2.