I started a message, changed my mind, wrote about some other thing and forgot to change the subject. Sorry for the noise.
Tiago. On Sat, Dec 08, 2007 at 07:25:16AM -0200, Tiago Saboga wrote: > Hi, > > I need an additional thread in my app, and I am trying to understand > how it works. Alas, all I found about threads is too simple (does not > fit in my real life problem) or too complicated. The best thing I've > read until now is the great tutorial by Norman Matloff, but it isn't > enough. If you could point me to some more docs, it would be great. > The python docs have been of no use for me in this case. > > Anyway, I am trying to play a little with it, and I can't understand > what's happening in this simple example. I want to establish a > connection between my two threads by a os.pipe, but it seems like I > can only read the pipe when everything was done. I was hoping to see > the output of writer.py come out in real time, but it is coming out > all together when writer.py returns. Why? > > Thanks, > > Tiago Saboga. > > =====writer.py======= > > #!/usr/bin/python2.5 > > import time > > for i in range(10): > print 'Line number %s.' % i > time.sleep(1) > > ======threadit.py======= > #!/usr/bin/python2.5 > > from __future__ import with_statement > import thread > import subprocess > import os > > def run(out): > subprocess.Popen(['./writer.py'], stdout=os.fdopen(out, 'w')) > > def main(): > out_r, out_w = os.pipe() > thread.start_new_thread(run, (out_w,)) > with os.fdopen(out_r) as f: > while True: > line=f.readline() > if line: > print '[main]', line > > if __name__=='__main__': > main() > _______________________________________________ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
