[Tutor] opening a pipe?

[Thomas Pani]

The subprocess module is what you're looking for.
Your example would look like

--------------------%<--------------------
import subprocess
p = subprocess.Popen('cat hi.txt', shell=True, stdout=subprocess.PIPE)
for line in p.stdout:
     print line
--------------------%<--------------------

I assume you know that you can just open a file for reading instead of 
piping cat.

thomas

James Hartley wrote:
> A Perl script can easily serve as a filter within a pipe as seen in
> the following:
> 
> use strict;
> use warnings;
> 
> open(IN, 'cat hello.txt |') or die 'unable to open file';
> while (<IN>) {
>     print;
> }
> close(IN);
> 
> Can I do the same within Python?  Thanks.
> 
> Jim
> _______________________________________________
> Tutor maillist  -  Tutor at python.org
> http://mail.python.org/mailman/listinfo/tutor