Weird Loop Behaviour
Arnaud Delobelle
arnodel at gmail.com
Fri Jan 20 18:10:44 EST 2012
On 20 January 2012 20:47, Yigit Turgut <y.turgut at gmail.com> wrote:
> Hi,
>
> In the following code, I am trying to run "black" screen for 3 seconds
> and respectively 2 seconds "white" screen. Black routine takes 3
> seconds and white 2 seconds, 2 x black + white = 8 seconds which
> should be the expected value but when I run it I get black-white-black-
> white instead of black-white-black. Couldn't figure out what is
> wrong thus sharing the code as well ;
>
> white = False
> while(end<8.00):
> end = time.time() - start
> if white:
> screen.fill((255, 255, 255))
> time.sleep(2)
> else:
> screen.fill((0, 0, 0))
> time.sleep(3)
> white = not white
> pygame.display.update()
> pygame.quit()
This is cryptic. You'd be better off with something like
black = 0, 0, 0
white = 255, 255, 255
for color, wait in (black, 3), (white, 2), (black, 3):
screen.fill(color)
pygame.display.update()
time.sleep(wait)
pygame.quit()
--
Arnaud
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