Return names, hall numbers, and the washers/dryers available for all
        rooms in the system

        >>> all_laundry = l.all_status()

def all_status(self):
        """Return names, hall numbers, and the washers/dryers available for all
        rooms in the system

        >>> all_laundry = l.all_status()
        """
        laundry_rooms = {}
        for room in self.hall_to_link:
            laundry_rooms[room] = self.parse_a_hall(room)

        return laundry_rooms