Python Microservices Development

The url_for function

The last interesting feature of Flask's routing system is the url_for() function. Given any view, it will return its actual URL.

Here's an example with the previous app:

    >>> from flask_converter import app     >>> from flask import url_for     >>> with app.test_request_context():     ...     print(url_for('person', name='Tarek'))     ...     /api/person/1  

The previous example uses the Read-Eval-Print Loop (REPL), which you can get by running the Python executable directly.

This feature is quite useful in templates when you want to display the URLs of some views depending on the execution context. Instead of hardcoding some links, you can just point the function name to url_for to get it.