Python filecmp.cmp('old_index.html', 'new_index.html') in if event

how can I make this python command in a if question:

import filecmp
filecmp.cmp('old_index.html', 'new_index.html')

the answer from these command is True or False. So that I can execute something when the files are the same or when they are not.

Thanks for your help