The default deck is really nice too. We're removing tests and checks and initializes because you don't have to check if a key is in a dictionary, you can just assume it's there. So anytime I need to, if it's a big collection and I need to insert stuff on at the start, then a collection deck from the collections module is a better choice. All right, let me see. Do I have any others that I want to squeeze in here? Okay, so here's one that I wanted to sneak in before we get further beyond this is to use guarding clauses. And I don't know how you feel about guarding clauses. Yeah, you do. Tell people