[Tutor] Capturing ctrl-c

[Michael Langford]

When I do real applications with exception based languages, I almost always
wrap the main function with a try/except block to allow me to gracefully
shut down.

In the case of python, this means 1> Use the main method 2> wrap its
execution in a try catch:

import mymodule

def do_stuff():
    pass

def graceful_cleanup()
    pass

if "__main__" == __name__:
       try:
             do_stuff()
       except:
             graceful_cleanup()

    --Michael

-- 
Michael Langford
Phone: 404-386-0495
Consulting: http://www.TierOneDesign.com/
Entertaining: http://www.ThisIsYourCruiseDirectorSpeaking.com

On 9/22/07, James <jtp at nc.rr.com> wrote:
>
> Hi.  :)
>
> I'm whipping up a program in Python and am having to deal with a user
> potentially hitting ctrl-c at any point in the program.  I'd like my
> Python program to wrap up cleanly when it receives this signal.
>
> I did some Googling and read that Python throws a KeyboardInterrupt
> error.  What's the best way to run a specific "cleanup" function at
> *any* time the interrupt is received, regardless of where the program
> is in execution?
>
> Most of the stuff I've read involves try-except blocks.  This makes
> sense to me if I want to protect a specific function or area of the
> code from being interrupted by ctrl-c, but I'm not sure what kind of
> structure my program must have to catch the exception at any point
> during execution.
>
> Thoughts/ideas appreciated.  :)
>
> Thanks!
> .james
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