How to find all registered URLs in a Flask application

To find all registered URLs in a Flask application, you can import the url_map object from the Flask instance and loop through its rules attribute. Here’s an example:

from flask import Flask

app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Hello, World!'

@app.route('/about')
def about():
    return 'About page'

if __name__ == '__main__':
    with app.test_request_context():
        for rule in app.url_map.iter_rules():
            print(rule)

In this example, we define a Flask application with two routes - '/' and '/about' - each mapping to a different view function.

When we run the application, Flask will automatically generate a URL map, which we can access through the url_map attribute of the app instance. We can then loop through the rules attribute of that map to print out each URL route.

Note that we are using the test_request_context() method to set up a temporary request context, which is required to access the url_map object in this way.