flask minimul app

  1. Import the Flask module: The first step is to import the Flask module, which provides the functionality to create a web application using Flask.

  2. Create an instance of the Flask class: Next, you need to create an instance of the Flask class, which represents the web application. This instance will be used to configure and run the application.

  3. Define a route and a view function: A route is a URL that the application will respond to. You can define routes using the @app.route decorator. Inside the view function, you can define the logic for what should happen when that route is accessed.

  4. Run the application: Finally, you need to run the application by calling the run() method on the Flask instance. This will start a development server and make the application accessible on a specified host and port.

Here's an example of a minimal Flask app that follows these steps:

from flask import Flask

app = Flask(__name__)

def hello():
    return 'Hello, World!'

if __name__ == '__main__':
    app.run(host='', port=5000)

Note: The code above assumes that you have already installed Flask. If not, you can install it using pip install flask.