How to parse dynamically updated pages?

Question

Python

There is a task to parse a site with exchange rates - https://kurs2015.ru/
The essence of the question is whether it is possible using Pyhton's libraries to load a page once, and then just get page updates. Roughly speaking, do not load the page again (and you will need to do this often, so I'm afraid to catch a ban), but simply analyze what data the script sends to the page.

Answer 1

look for python parse websocket data

Answer 2

You need to debug this page and see where it downloads updates from. DevTools to the rescue.
Most likely there is a regular ajax request