[Tutor] Shell scripting

[Chris Fuller]

If you want the return code, there are at least two ways to do it.  My zsh 
shell is configured to print the last return code in the prompt:
0 % python
Python 2.4.4 (#2, Apr 15 2008, 23:43:20)
[GCC 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.exit(-1)
255 % python
Python 2.4.4 (#2, Apr 15 2008, 23:43:20)
[GCC 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> raise SystemExit(-1)
255 %

note that you are limited to eight bit integers.

To get some text, the usual backquote method for grabbing the output from a 
command to use in your script would work.  You should consult a bash manual 
for that, I use it so infrequently that I have to relearn it every time :)

Cheers

On Wednesday 17 September 2008 11:30, Patrick wrote:
> I was just wondering if there was a way to return the results of a
> python script to the bash shell? I was thinking about using the output
> as an argumen for another shell command. I know that we can use the
> shell from within Python via the OS module but I believe this is usually
> used to feed input into the program.
>
> Here is a silly pseudo code example:
>
> bash command | some-python-script.py |  some.other-script.sh
>
> thanks in advance-Patrick
>
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