Parallel Processing

[Yigit Turgut]

On Jan 8, 6:00 pm, Chris Angelico <ros... at gmail.com> wrote:
> On Mon, Jan 9, 2012 at 2:45 AM, Yigit Turgut <y.tur... at gmail.com> wrote:
> > job1 = job_server.submit(test1,())
> > job2 = job_server.submit(test2())
>
> The first of these passes test1 and an empty tuple as arguments to
> submit(). The second calls test2 with no arguments, then passes its
> return value to submit(), which is not what you want to do.
>
> Chris Angelico

Yes that's correct but (test1,()) doesn't do any good since it doesn't
execute the loop.

screen = pygame.display.set_mode((0, 0), pygame.FULLSCREEN)
timer = pygame.time.Clock()
white = True
start = time.time()
end = time.time() - start
end2= time.time() - start

def test1():
  global end
  global white
  while(end<5):
    end = time.time() - start
    timer.tick(4) #FPS
    screen.fill((255,255,255) if white else (0, 0, 0))
    white = not white
    pygame.display.update()

def test2():
  global end2
  while(end2<5):
    end2 = time.time() - start
    print end2

ppservers = ()
job_server = pp.Server(ppservers=ppservers)

job1 = job_server.submit(test1, (), globals=globals())
job2 = job_server.submit(test2, (), globals=globals())
result = job1()
result2 = job2()

print  result2

job_server.print_stats()

This *supposed to* print values of 'end' and simultaneously execute
test1. Eventhough I set globals parameter and nothing seems to be
wrong this code generates the following traceback ;

Starting pp with 2 workers
An error has occured during the function execution
Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/ppworker.py", line 90, in run
    __result = __f(*__args)
  File "<string>", line 4, in test1
NameError: global name 'end' is not defined
An error has occured during the function execution
Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/ppworker.py", line 90, in run
    __result = __f(*__args)
  File "<string>", line 3, in test2
NameError: global name 'end2' is not defined

How can this be, what am I missing ?