[IPython-User] catching system call's output in notebook
Mon Feb 6 13:29:37 CST 2012
Julian and Thomas,
Thanks for the comments!
On 02/06/2012 08:22 PM, Thomas Kluyver wrote:
> On 6 February 2012 19:15, Julian Taylor <firstname.lastname@example.org
> <mailto:email@example.com>> wrote:
> use the subprocess module instead of os.system:
> import subprocess
> print subprocess.check_output(["./test"])
> To explain some more about the difference: when you do os.system, it's
> not capturing stdout/stderr from the new process. In the terminal,
> this works, because stdout and stderr just go directly to the
> terminal, without Python ever knowing about them. In the notebook, it
> doesn't, because the kernel can only forward stdout/stderr that it
> knows about.
> subprocess.check_output() captures stdout and returns it. If you need
> to capture stderr as well, refer to the docs:
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