[MM3-users] remove non members from a list

Hi all:

I need to remove all non members from a list. I know I can do it via Postorius, but it has to be done one at a time. (you can delete ALL suscribers but not all non members...)

Anyone has a python recipe to do this?

I've been searching and googling but I cannot find the way of doing it safely. And via DDBB there are more than one table involved and I'd rather not mess it all...

Thanks in advance