pipes

[yagyala]

Hi. I'm rtying to use pipes to communicate between a python GUI and a
spawned C++ program. I prefer not to use forking because the app may
be run on windows, where forking isn't supported. Roughly what I'm
doing is:

(r,w) = os.pipe()
spawnl(P_WAIT, 'tool.exe', ' ', message, str(w))
close(w)
print os.read(r, 1000)

In c++ ,
....
int main(int argc, char** argv)
{

}

[Daniel Klein]

On Mon, 10 Sep 2007 20:15:40 -0700, yagyala <mb****@phys.ks u.edu>
wrote:

>Hi. I'm rtying to use pipes to communicate between a python GUI and a
spawned C++ program. I prefer not to use forking because the app may
be run on windows, where forking isn't supported. Roughly what I'm
doing is:

(r,w) = os.pipe()
spawnl(P_WAI T, 'tool.exe', ' ', message, str(w))
close(w)
print os.read(r, 1000)

In c++ ,
...
int main(int argc, char** argv)
{

}

The 'subprocess' module provides an easier interface imo, eg:

process = subprocess.Pope n('tool.exe', stdin=subproces s.PIPE,
stdout=subproce ss.PIPE, universal_newli nes=true)
(self.outstream , self.instream) = (process.stdout , process.stdin)

Daniel Klein