Re: Python 2.5a1 and SkunkWeb 3.4.1

On Fri, Apr 07, 2006 at 12:04:23PM -0700, Drew Csillag wrote:
> Now that they've officially deprecated string exceptions in Python 2.5, if you
> use any amount of data components, you'll get a large slew of
> DeprecationWarnings to the terminal that started SkunkWeb.  This fixes the case
> for data components, I'm pretty sure there are others floating about.  There
> is, however, a caveat that:
>     raise ReturnValue, 5
> is now indistinguishable from:
>     raise ReturnValue, (5,)
> but *is* distinct from:
>     raise ReturnValue, [5]
> 
> And I don't see any easy way to work around things so raising (5,) would come
> out as (5,) and raising 5 also comes out as 5.  So if you return variable
> length tuples with this patch, be careful.  If anybody has a better fix for
> this, that'd be good.

Looks like a Python bug to me.  Do you know if it has been
discussed/reported?

If they do stick with this insane behavior, using "ReturnValue(thing)"
syntax will side-step the problem.

Another implementation that I think would work in Executables would be:

   try:
       return val.message
   except AttributeError:
       return val.args

'message' is a 2.5-ism.  This way we don't need to look at the type of
args.


Cheers,

js


> 
> Cheers,
> Drew
> 
> 
> diff -r /sai/skunkweb/lib/pylibs/AE/Exceptions.py ./Exceptions.py
> 11c11,12
> < ReturnValue = "ReturnValue"
> ---
> > class ReturnValue(Exception):
> >     pass
> diff -r /sai/skunkweb/lib/pylibs/AE/Executables.py ./Executables.py
> 74c74,76
> <                 return val
> ---
> >                 if type(val.args) == type(()) and len(val.args) == 1:
> >                     return val.args[0]
> >                 return val.args
> 
> 
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-- 
Jacob Smullyan

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