I'm not sure that applies here... or not sure *how* it applies. 1. My tests have all been with the commandline so there is no webserver involved. 2. The same methodology works fine elsewhere to spawn secondary processes (have been using it for a month or so and it works well). 3. I can test and verify that using the multiprocessing module to spawn a long running (10+ min) background process works fine within web2py. I get the PID back, store and use it later to kill the process. 4. Another thread on this list discussed the multiprocessing library: http://groups.google.com/group/web2py/browse_thread/thread/98e4e0ec731a97a1/cd2520facc0ee6ea?lnk=gst&q=nitesedge#cd2520facc0ee6ea
As far as I can understand (what am I missing?) the only distinction is opening the pyaudio stream. Perhaps there is an incompatibility between pyaudio and web2py? -- Nite On Jun 1, 12:19 pm, Massimo Di Pierro <massimo.dipie...@gmail.com> wrote: > Yes. The web server will kill requests that take tool long. You must > run something like this in a background process. > > On Jun 1, 10:26 am, Nite <nitese...@gmail.com> wrote: > > > > > > > > > I'm trying to start a background process to monitor the audio and am > > using pyaudio to accomplish it. I started with a separate script, but > > decided it seemed simpler to move the code into my module. > > > The issue is that once I call the p.open to create the stream the > > subprocess hangs and I never get the pid back. If I remove the "stream > > =" line then it works fine. > > > I started out thinking this was a python issue, but when I test > > outside of web2py (snip out the appropriate functions and run via cli) > > it works fine. > > > from subprocess import * > > from multiprocessing import Process, Queue > > > def listener(self, q): > > CHANNELS = 2 > > RATE = 44100 > > INPUT_BLOCK_TIME = 0.05 > > FORMAT = pyaudio.paInt16 > > RATE = 44100 > > INPUT_FRAMES_PER_BLOCK = int(RATE*INPUT_BLOCK_TIME) > > > p = pyaudio.PyAudio() > > stream = p.open(format = FORMAT, > > channels = CHANNELS, > > rate = RATE, > > input = True, > > frames_per_buffer = INPUT_FRAMES_PER_BLOCK) > > q.put(os.getpid()) > > import time > > time.sleep(300) > > > def startListener(self): > > q = Queue() > > p = Process(target=self.listener, args=[q]) > > p.daemon=True > > p.start() > > print q.get() > > > Is there something about threading or modules that prevents this from > > working in web2py? > > > Any help is appreciated!
