A Queue Class for Python Simulation

sim_queue.py

##########################
#### CHECK-IN QUEUES #####
##########################
class CheckInQueue:
    """ Class used to model a check-in line Queue
    """
    def __init__(self):
        self.queue = q.Queue()
        self.customers_added = 0

    def add_passenger(self, new_passenger):
        self.queue.put_nowait(new_passenger)
        self.customers_added += 1

    def get_next_passenger_in_line(self):
        if not self.queue.empty():
            next_customer = self.queue.get_nowait()
            self.queue.task_done()
        else:
            next_customer = None
        return next_customer