pygame.event.get() 由于某种原因在循环

Question

出于某种原因，这段代码在我运行时一直循环。

for event in pygame.event.get():
    if event.type == pygame.QUIT:
        sys.exit()
    if event.type == pygame.KEYDOWN:
        if event.key == pygame.K_ESCAPE:
            sys.exit()
        x = p_pos[0]
        y = p_pos[1]
        if event.key == pygame.K_LEFT:
            x -= 30
        if event.key == pygame.K_RIGHT:
            x += 30
        p_pos = [x,y]