def find_restaurants(peopleSet):
#TODO maybe loop the other way arounf (for each person get their restaurants
db = DB() #TODO mayvbe should get it from outside
restaurants = db.get_all_restaurants()
if not peopleSet:
return restaurants
final = []
for restaurant in restaurants:
restaurant_goers = set(db.get_people_for_restaurant(restaurant))
if peopleSet <= restaurant_goers:
final.append(restaurant)
return final
