install Ctrl-C handler

[Uwe Mayer]

Hi,

can anybody tell me how you install something like a Ctrl-C handler in
Python, i.e. a routine that is called when ^C is pressed and that can do
cleanup work?

Thanks
Uwe

[James Henderson]

Re: install Ctrl-C handler

On Wednesday 04 February 2004 12:04 pm, Uwe Mayer wrote:[color=blue]
> Hi,
>
> can anybody tell me how you install something like a Ctrl-C handler in
> Python, i.e. a routine that is called when ^C is pressed and that can do
> cleanup work?
>
> Thanks
> Uwe[/color]

Maybe you require something more sophisticated but ctrl-C raises an exception
that can be caught:
[color=blue][color=green][color=darkred]
>>> try:[/color][/color][/color]
.... while 1: pass
.... except KeyboardInterru pt:
.... print 'Interrupted!'
....
Interrupted!


James
--
James Henderson, Logical Progression Ltd.

http://www.logicalprogression.net/

http://sourceforge.net/projects/mailmanager/

[James Henderson]

Re: install Ctrl-C handler

On Wednesday 04 February 2004 12:15 pm, James Henderson wrote:[color=blue]
> On Wednesday 04 February 2004 12:04 pm, Uwe Mayer wrote:[color=green]
> > Hi,
> >
> > can anybody tell me how you install something like a Ctrl-C handler in
> > Python, i.e. a routine that is called when ^C is pressed and that can do
> > cleanup work?
> >
> > Thanks
> > Uwe[/color]
>
> Maybe you require something more sophisticated but ctrl-C raises an
> exception
>
> that can be caught:[color=green][color=darkred]
> >>> try:[/color][/color]
>
> ... while 1: pass
> ... except KeyboardInterru pt:
> ... print 'Interrupted!'
> ...
> Interrupted![/color]

Thinking about it, try-finally would also work:
[color=blue][color=green][color=darkred]
>>> try:[/color][/color][/color]
.... while True: pass
.... finally:
.... print 'cleaning up'
....
cleaning up
Traceback (most recent call last):
File "<stdin>", line 2, in ?
KeyboardInterru pt


J.
--
James Henderson, Logical Progression Ltd.

http://www.logicalprogression.net/

http://sourceforge.net/projects/mailmanager/

[Diez B. Roggisch]

Re: install Ctrl-C handler

> can anybody tell me how you install something like a Ctrl-C handler in[color=blue]
> Python, i.e. a routine that is called when ^C is pressed and that can do
> cleanup work?[/color]

On *nix you can use the signal-module for general signal handling. There are
some caveats in multithreaded apps.

Regards,

Diez