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Tue Dec 25 23:05:26 CET 2012 · https://mail.python.org/pipermail/python-dev/2012-December/123308.html

static method is better than new builtin function, agree.

On Wed, Dec 26, 2012 at 12:03 AM, Benjamin Peterson <benjamin at python.org> wrote:
> 2012/12/25 Andrew Svetlov <andrew.svetlov at gmail.com>:
>> Currently we have exception tree of classes inherited from OSError
>> When we use C API we can call PyErr_SetFromErrno and
>> PyErr_SetFromErrnoWithFilename[Object] functions.
>> This ones raise concrete exception class (FileNotFoundError for
>> example) looking on implicit errno value.
>> I cannot see the way to do it from python.
>>
>> Maybe adding builtin like exception_from_errno(errno, filename=None)
>> make some value?
>> Function returns exception instance, concrete class depends of errno value
>
> I think a static method on OSError like .from_errno would be good.
>
>
> --
> Regards,
> Benjamin

-- 
Thanks,
Andrew Svetlov

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[Python-Dev] Raising OSError concrete classes from errno code