Would relays be kicking me off or just decide to stop responding if I'm subscribed for too long? Is there any way I could detect that if it happens?

I should say that what I'm trying to do is run a python program that forever listens for DVM related events. I've been using a version of nostr_client() from here: https://github.com/believethehype/nostrdvm/blob/main/tests/test_dvm_client.py 

It does look like this has been updated since I last started using it, maybe I should adapt this most recent code.