线程Thread-1中的Python异常(最有可能在解释器关闭期间引发)？

我和我的朋友一直致力于一个大型项目,以便在python和PyGame中学习和娱乐.基本上它是一个小村庄的AI模拟.我们想要一个日/夜循环,所以我找到了一种利用numpy改变整个表面颜色的巧妙方法(特别是交叉渐变教程) - http://www.pygame.org/docs/tut/surfarray/SurfarrayIntro. HTML

我将它实现到代码中并且工作正常,但速度非常慢,比如<1 fps slow.所以我看看线程(因为我想最终添加它)并在队列中找到这个页面 - 在python中学习队列模块(如何运行它)

我花了大约15分钟制作一个基本系统,但是一旦我运行它,窗口关闭,它说

Exception in thread Thread-1 (most likely raised during interpreter shutdown):

编辑:这就是它所说的全部,没有回溯错误

我不知道我做错了什么,但我想我错过了一些简单的事情.我在下面添加了代码的必要部分.

q_in = Queue.Queue(maxsize=0)

q_out = Queue.Queue(maxsize=0)

def run():    #Here is where the main stuff happens
    #There is more here I am just showing the essential parts
    while True:
        a = abs(abs(world.degree-180)-180)/400.

        #Process world
        world.process(time_passed_seconds)

        blank_surface = pygame.Surface(SCREEN_SIZE)
        world.render(blank_surface)    #The world class renders everything onto a blank surface
        q_in.put((blank_surface, a))
        screen.blit(q_out.get(), (0,0))

def DayNight():
    while True:
        blank_surface, a = q_in.get()
        imgarray = surfarray.array3d(blank_surface)  # Here is where the new numpy       stuff starts (AKA Day/Night cycle)
        src = N.array(imgarray)
        dest = N.zeros(imgarray.shape)
        dest[:] = 20, 30, 120
        diff = (dest - src) * a
        xfade = src + diff.astype(N.int)

        surfarray.blit_array(blank_surface, xfade)
        q_out.put(blank_surface)
        q_in.task_done()

def main():
    MainT = threading.Thread(target=run)
    MainT.daemon = True
    MainT.start()

    DN = threading.Thread(target=DayNight)
    DN.daemon = True
    DN.start()

    q_in.join()
    q_out.join()

如果有人可以提供帮助,将不胜感激.谢谢.