[Baypiggies] how can I change the input parameter in my executable while calling from either os.system or os.popen calls?

[Matt Good]

On Aug 21, 2008, at 10:01 AM, Joshua Gallagher wrote:

> There may be another, and better, way of doing it, but I usually use
> Popen like this:
> cmd = <something>
> p_obj = subprocess.Popen(cmd, shell=True,
>                         stdout=subprocess.PIPE,
>                         stderr=subprocess.STDOUT)
> output = p_obj.stdout.read()


Using the std* streams directly is prone to deadlock.  If you can,  
stick to using popen.communicate()

proc = subprocess.Popen([cmd, arg1, arg2], stdout=subprocess.PIPE,  
stderr=subprocess.PIPE)
pout, perr = subprocess.communicate()

http://docs.python.org/lib/node532.html

-- Matt