Pierre Rouleau wrote: > Hi all, > > I have a consistent test case where os.popen3() hangs in Windows. The > system hangs when retrieving the lines from the child process stdout. > I know there were several reports related to os.popen3() hanging under > Windows in this group before.
I had a problem like this some time ago. But it was a problem that would happen under any operating system. If there is output on stdout and stderr, you will get a dead lock sooner or later. Example: The childprocess tries to write to stderr, and the parent process reads from stdin. The buffer of stderr will get full. The child will block. The parent will wait for ever. See http://docs.python.org/lib/popen2-flow-control.html My hint: Always use popen4 You can get dead locks with popen4, too. But only if you write to pipe.tochild. Thomas -- Thomas Güttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/ E-Mail: guettli (*) thomas-guettler + de Spam Catcher: [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
