Peter Hansen wrote: > [EMAIL PROTECTED] wrote: > > Nevermind. I found a better solution. I used shared memory to create > > a keep-alive flag. I then use the select function with a specified > > timeout, and recheck the keep-alive flag after each timeout. > > As Dennis points out, your original attempt was destined to fail because > you were calling the method from the main thread, not the one you wanted > to kill. Threads don't magically execute any methods that are attached > to the Thread instance just because they're attached. You have to > actually call those methods *from* the thread, which means from the > run() method or from any of the routines it calls (whether they are > methods on that Thread or not), but it must be done in the context of > the thread you want to raise exceptions in or it won't work. > > More importantly, you've now described your use case (and I hope that of > the OP as well, since he hasn't replied yet): killing threads. > > This is an oft-discussed topic here, and searching the archives will > probably give you lots more answers, but the short answer is you cannot > kill a thread in Python (except by exiting the entire process). Instead, > as you've discovered, you must ask it nicely to exit. The nearly > canonical approach to doing that is as follows: > > class MyThread(threading.Thread): > def __init__(self, *args, **kwargs): > threading.Thread.__init__(self, *args, **kwargs) > self._keepRunning = True > > def stop(self, timeout=None): > self._keepRunning = False > # optional: wait for thread to exit > self.join(timeout=timeout) > > def run(self): > while self._keepRunning: > # do stuff here > > Now you can do things like this: > > thread = MyThread() > thread.start() > # other stuff... > thread.stop() # block here until the thread exits > > I hope that clarifies things a little more... > > -Peter
-- http://mail.python.org/mailman/listinfo/python-list
