default flask app

  1. Import Flask: The first step is to import the Flask module, which is a web framework for Python. This module provides tools and functionalities to build web applications.

  2. Create an instance of the Flask class: Next, create an instance of the Flask class. This instance will be the main application object and will handle all the requests and responses.

  3. Define a route and its handler function: A route is a URL pattern that the application will respond to. The handler function is the code that will be executed when a request is made to that URL.

  4. Run the application: Finally, run the application using the run() method. This will start the Flask development server and make the application accessible at a specific host and port.

Here is an example:

from flask import Flask

# Step 1: Import Flask
app = Flask(__name__)

# Step 2: Create an instance of the Flask class
def hello_world():
    # Step 3: Define a route and its handler function
    return 'Hello, World!'

# Step 4: Run the application
if __name__ == '__main__':

This code sets up a basic Flask application that responds with "Hello, World!" when the root URL is accessed.