[Python-Dev] Symbolic errno values in error messages

[M.-A. Lemburg]

On 2008-05-16 17:02, Alexander Belopolsky wrote:
> On Fri, May 16, 2008 at 10:52 AM, Yannick Gingras <ygingras at ygingras.net> wrote:
> 
>>>>>> print e
>>> [Errno 21] Is a directory
>>>
>>> So now I am not sure what OP is proposing.  Do you want to replace 21
>>> with EISDIR in the above?
>> Yes, that's what I had in mind.
>>
> 
> In this case, I have a more drastic proposal.  Lets change
> EnvironmentError errno attribute (myerrno in C) to string.  

-1

You never want to change an integer field to a string.

>'EXYZ'
> strings can be interned, which will make them more efficient than
> integers for lookups and comparisons (to literals).  A half-way and
> backward compatible solution would be to stick 'EXYZ' code at the end
> of the args tuple and add an errnosym attribute.

Actually, you don't have to put it into any tuple. Just add it
to the error object as attribute.

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