Check if any alert exists using selenium with python

I’m trying to write a test with selenium in python language for a web page that manages users. In this page someone can add role for users and if a role exists while adding it, an alert raises. I don’t know if the alert is a javascript alert or an element of the web page. I want to automatically check the existence of the alert, because checking for the role in the list wastes time and has an enormous load. I tried this:

Getting console.log output from Chrome with Selenium Python API bindings

I’m using Selenium to run tests in Chrome via the Python API bindings, and I’m having trouble figuring out how to configure Chrome to make the console.log output from the loaded test available. I see that there are get_log() and log_types() methods on the WebDriver object, and I’ve seen Get chrome’s console log which shows how to do things in Java. But I don’t see an equivalent of Java’s LoggingPreferences type in the Python API. Is there some way to accomplish what I need?