how do I pipe two processes?

[Michele Simionato]

On Feb 1, 10:12 am, Bilgehan.Bal... at gmail.com wrote:
> Hi, I want to pipe output of process A to B, and read output of B from
> python. On Unix if I do the following:
>
> child_out, child_in = popen2("program_a | program_b")
>
> line = child_out.readline()
>
> I get "IOError: bad file descriptor" from Python, and broken pipe
> error from program_b. How do I do this right?
>
> Thanks,
> Bahadir

Use the subprocess module, see the examples here:
http://docs.python.org/dev/lib/node539.html

 Michele Simionato