Catch and name an exception in Python 2.5 +

Thomas Jollans t at jollybox.de
Fri Aug 26 22:36:21 CEST 2011


On 26/08/11 21:56, Steven D'Aprano wrote:
> In Python 3, you can catch an exception and bind it to a name with:
> 
> try:
>     ...
> except ValueError, KeyError as error:
>     pass
> 
> In Python 2.5, that is written:
> 
> try:
>     ...
> except (ValueError, KeyError), error:
>     pass
> 
> and the "as error" form gives a SyntaxError.
> 
> Python 2.6 and 2.7 accept either form.
> 
> Is there any way to catch an exception and bind it to a name which will work
> across all Python versions from 2.5 onwards?
> 
> I'm pretty sure there isn't, but I thought I'd ask just in case.

It's not elegant, and I haven't actually tested this, but this should work:

try:
    ...
except (ValueError, KeyError):
    error = sys.exc_info()[2]

-- 
Thomas




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