[Tutor] timeout a routine

[arbaro arbaro]

Thanks a lot Jordan,

I have no experience with classes at all yet, so your example will
give me a really nice startting point.




On 11/28/06, Jordan Greenberg <jordangreenberg at gmail.com> wrote:
> arbaro arbaro wrote:
> > Hello,
> <SNIP>
> > Is there a way to run the command
> > os.path.isdir("/mnt/server/folderOnServer"), and kill the attempt if
> > it tries for longer then 5 seconds?
> > Where/what can I use to accomplish something like this?
> >
> >
> > Thanks,
> > Arbaro
>
> Hi Arbaro!
> The only way I can think of is with threads.
> Its not too hard to use one thread to control another, and stop it after
> a certain amount of time. Something like this:
>
> #threadexample.py
>
> from threading import Thread
> import time
>
> MyThread(Thread):
>         def __init__(self, message):
>                 self.message=message
>                 Thread.__init__(self)
>         def run(self):
>                 while True:
>                         print "MyThread: "+self.message
>
> class Controller(Thread):
>         def __init__(self, runner,time):
>                 self.runner=runner
>                 self.delta=time
>                 Thread.__init__(self)
>
>         def run(self):
>                 self.start=time.time()
>                 self.runner.start()
>                 self.done=False
>                 while not self.done:
>                         if time.time() > (self.start+self.delta):
>                                 print "Controller: Stopping MyThread."
>                                 self.runner._Thread__stop()
>                                 return
>
> mythread=MyThread("hello")
> control=Controller(mythread, 2)
> control.start()
>
> #end of threadexample.py
>
> I'm still just learning threading, so there is probably a better way to
> do this, though this seems to work pretty well.
>
>
> Hope this helps,
> Jordan Greenberg
>