[Tutor] Popen problem with a pipe sign "|"

[hyou]

Hi Sander,

My guess is that the two shell options must be treating the command string differently, thus the "|" sign has different functionalities on them.  

Thanks!
Shawn

-----Original Message-----
From: Sander Sweers [mailto:sander.sweers at gmail.com] 
Sent: Monday, July 06, 2009 10:23 AM
To: hyou
Cc: Python Tutor List
Subject: Re: [Tutor] Popen problem with a pipe sign "|"

2009/7/6 hyou <hyou00 at hotmail.com>:
> Do I post to the list by also replying to Python Tutor List?

Yes, thanks.

> Thanks for the answer! I found the problem was because I put the 2nd
> argument to Popen with Shell = true. Though I'm not sure why it doesn't work
> with Shell = true while the same setting works for other commands.

You can read up on subprocess on [1]. I do not understand why this
does not work with shell=True. My best guess is that it gets
interpreted as a pipe.

Greets
Sander

[1] http://docs.python.org/library/subprocess.html