default flask app
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.
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.
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.
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
@app.route('/')
def hello_world():
# Step 3: Define a route and its handler function
return 'Hello, World!'
# Step 4: Run the application
if __name__ == '__main__':
app.run()
This code sets up a basic Flask application that responds with "Hello, World!" when the root URL is accessed.