Practice Exercise 6: Flask

Objectives

Create a simple Flask app

Tasks

Before doing this stop make sure to stop the nginx service
On the web1 instance, create a directory for your app and navigate into it:
```
mkdir my_flask_app
cd my_flask_app
```
Create a virtual environment
```
python3 -m venv flask_env
```
Activate the virtual environment
```
source flask_env/bin/activate
```
Install Flask in the virtual environment:
```
pip install flask
```

Create a Python file for your Flask app app.py:

from flask import Flask

app = Flask(__name__)

@app.route('/')
def hello():
    return 'Hello, and welcome to my first Flask app!'

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=80)

Start the flask app:
```
sudo flask_env/bin/python3 app.py
```
Open a web browser and visit your host .a1t-inf-ds-web1.acad.opswerks.net

Note: Ensure port 80 is open

Conclusion

By following these steps, you have gained hands-on experience in creating a basic Flask web application, which can serve as a foundation for developing more complex web applications. Flask is a versatile and user-friendly web framework that provides a powerful platform for building web services and web-based applications.