sys.exit

[Chuck Esterbrook]

Donn Cave wrote:
> 
> Quoth Chuck Esterbrook <echuck at mindspring.com>:
> | The short question:
> |
> | If I catch a SystemExit exception (because of an invocation of
> | sys.exit(code)), how do I examine the argument to sys.exit()?
> 
> ...
> | Upon printing the "excInfo" tuple I get:
> |
> |     (<class exceptions.SystemExit at 80afc70>, <exceptions.SystemExit instance at 8110f58>, <traceback object at 811f540>)
> |
> | And the attributes of the SystemExit instance are:
> |
> |     ['__doc__', '__init__', '__module__']
> |
> | I don't know how to get my hands on the exit code.
> 
> That's not the instance you're looking at there, but the class, so
> that's kind of a red herring.  The instance has a 'code' attribute
> for you.
> 
> So you need something like
> 
>         eclass, einstance, etrace = sys.exc_info()
>         if eclass == SystemExit:
>                 if einstance.code == 0:
>                         self._errorOccurred = 0

Silly me: I was printing [0] of the tuple rather than [1] by mistake. Don & Tim are both right. The instance has attributes "args" and "code". For my purpose, I prefer using "code".

Thanks!

-Chuck