Email Validity (Python 3)

I'm creating a registration section in my coursework, and so far it's going rather well, however, I'm struggling to find a way to validate the user's email to check if it is actually an email. I know that I have to use regular expressions, but I'm not sure how to implement it. Any help is very appreciated.

Well, a very simple way is just to check if there is one @ in it, and a point afterwards