[Tutor] using variables as args

[Jerome Jabson]

Thank you, Alan! I'll try using POPEN.

Jerome

--- Alan Gauld <alan.gauld at freenet.co.uk> wrote:

> > I'm trying to start a shell script with 4
> arguments
> > from my python script. I'm having problems trying
> to
> > figure out the best way to do this. 
> 
> Use a format string:
> 
> cmd = "myscript %s %s %s %s"
> os.system(cmd % (p1,p2,p3,p4))
> 
> OR
> 
> cmdstr = cmd % p1,p2,p3,p4
> os.system(cmdstr)
> 
> The second form is easier to debug...
> 
> > to use popen3 to keep track of stdin, stdout, and
> err,
> 
> Ok, substitute popen3 for system().
> Or better still use the subprocess module and 
> the Popen class.
> 
> See the OS topic in my tutor for more on the
> subprocess 
> module.
> 
> Alan Gauld
> Author of the Learn to Program web site
> http://www.freenetpages.co.uk/hp/alan.gauld
> 
> 


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com