On Wed, May 25, 2005 at 09:03:13PM +0100, Chris Withers wrote:
> >>if getattr(thefolder.aq_inner.aq_explicit,the_id,None):
> >
> >You are aware that this is in general *NOT* an emulation
> >of "hasattr".
>
> I didn't say it was ;-)
>
> >It may fail e.g. for properties.
>
> How would it fail for properties?
Well, it doesn't distinguish between an attribute which doesn't exist
and an attribute which has any false value. This makes it unsuitable as
a hasattr() replacement IMHO.
It feels kind of hacky, but for this kind of thing I've used the "marker"
pattern that you find throughout the Zope source:
marker = ()
if getattr(some_object, marker) is not marker:
...
--
Paul Winkler
http://www.slinkp.com
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