Introduction

Flask routing is a crucial part of web application development. It defines how your application responds to different URLs. In this guide, we'll explore Flask routing and learn how to handle URL requests by defining routes and views in your Flask application.

Step 1: Setting Up Your Flask Application

Before working with routing, make sure you have a Flask application. If not, you can create a basic Flask app like this:

from flask import Flask
app = Flask(__name)
        

Step 2: Defining Routes

In Flask, you can define routes using the @app.route() decorator. This decorator specifies which URL should trigger your view function. Here's an example:

@app.route('/')
def home():
    return "Welcome to the home page"
@app.route('/about')
def about():
    return "Learn more about us"
@app.route('/contact')
def contact():
    return "Contact us here"
        

In this example, we define three routes: the root URL ('/'), '/about', and '/contact'. Each route corresponds to a different view function that returns a specific response when accessed.

Step 3: Running Your Application

To run your Flask application, you can add the following code at the end of your script:

if __name__ == '__main__':
    app.run()
        

Now, you can run your application with the command python your_app.py, and you should be able to access the defined routes in your web browser.

Conclusion

Flask routing is a powerful feature that allows you to map URLs to specific view functions, making your web application interactive and dynamic. By defining routes, you can handle different URL requests and serve appropriate content to your users.