In this topic, we will explore the concept of routes and URL mapping in Flask, providing in-depth knowledge and examples to enhance your understanding. Routes play a crucial role in defining the structure of your web application and determining how different URLs are handled. Let’s dive into the topic:

  1. What are Routes?

    • Routes in Flask define the paths or URLs that users can access to interact with different parts of your web application.
    • Each route corresponds to a specific function or view that is executed when the user visits a particular URL.


    @app.route('/') def index(): return 'Welcome to the homepage!'

    In this example, the route decorator @app.route('/') maps the root URL (“/”) to the index function, which returns a simple message.

@app.route('/') def index(): return 'Welcome to the homepage!'