[Tutor] threading not working how about fork?

[Kent Johnson]

On Wed, Oct 22, 2008 at 5:44 PM, Ertl, John C CIV 63134
<john.ertl at navy.mil> wrote:
> Classification: UNCLASSIFIED
> Caveat (s): FOUO

??

> Thanks for the help and I am looking into the pyprocessing but threading is
> causing too many headaches (I may have to rewrite things).  Lets say I have
> something as simple as below:
>
> def takeTime(a):
>      print "Started %s" % a
>      time.sleep(10)
>      print "Ended %s" % a
>
> for each in [1,2,3,4,5]:
>    pid = os.fork()
>    takeTime(each)
>
> Each time the function is called it waits 10 seconds.  And if I run it as
> above it does the first and waits 10 seconds then the second and waits ten
> seconds...etc.

You are calling takeTime() from both the parent and child process, and
you are spawning additional processes from the child process as well.
Try
if os.fork():
  takeTime(each)
  break

Kent