tarun írta:
> Hi Laszlo Nagy,
>
> Thanks a lot.
> But the issue over here is that how will the child thread acknowledge
> the main thread that it has completed its task. For this I'll have to
> set some flag in the child thread and poll for it in the main thread.
> This will create a problem.
What kind of problem, can you explain? Supposing your child (worker)
thread created the output, I would do it this way (untested):
class Child(threading.Thread):
def __init__(self,output):
self.stop_requested = threading.Event()
self.stopped = threading.Event()
self.output = output
....
def run(self):
try:
while not self.stop_requested.isSet():
# put your algorithm here
....
# but check periodically if you need to abort the job.
if self.stop_requested.isSet():
break
...
# when you have data, put into the output queue
self.output.put( your_output )
finally:
self.stopped.set()
-- And then, from the main thread, create the worker:
self.queue = Queue()
self.child = Child(self.queue)
-- wxApp.OnIdle:
if not self.queue.empty():
data = self.queue.get()
# display your data here, for example add to a text control.
if self.child.stopped.isSet():
add_log("Job compete") # tell the user what is going on
And finally, you can have a button for stopping the script:
def OnClick(self,event):
self.child.stop_requested.set()
add_log("stopping worker thread....") # tell the user what is going on
> Any alternatives??
First you should tell us what is the problem with using two threads.
Regards,
Laszlo
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