Gracefull application exit.

[M.-A. Lemburg]

On 2008-07-26 20:30, M.-A. Lemburg wrote:
> On 2008-07-24 18:06, Robert Rawlins wrote:
>> Chaps,
>>
>>  
>>
>> I'm looking to implement an exit/termination process for an application
>> which can be triggered by A) a keyboard interrupt or B) termination of 
>> the
>> application as a Daemon using a signal.
>>
>>  
>>
>> I have a whole bunch of tasks I want to perform as a cleanup before the
>> application is terminated, cleaning files, database calls, closing open
>> connections and a few other things.
>>
>>  
>>
>> I know we have:
>>
>>  
>>
>> # I'm the main application started method.
>>
>> if __name__ == "__main__":
>>
>>  
>>
>> For starting an application, but do we have an equivalent methods for 
>> when
>> an application is terminated which we can use to close down any current
>> internal processes before the application exits?
>>
>>  
>>
>> I'd really love to have your thoughts and experience on gracefully 
>> killing
>> an application.
> 
> Wrap your whole application into a main() function and then use:
> 
> try:
>     main()
> finally:
>     cleanup()
> 

BTW: In order to catch signals, you'll have to install signal handlers
which then raise Python exceptions, e.g. SystemExit.

-- 
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