[Zope] work around for importing zexp into zope2.8.1?

[Tim Nash]

Dieter,
  Thanks again. It worked like a charm!
Tim

On 2/7/06, Dieter Maurer <dieter at handshake.de> wrote:
> Tim Nash wrote at 2006-2-6 11:34 -0800:
> >  Has anyone come across a work around for the problem of importing
> >zexp into zope 2.8.1?
>
> As others already pointed out: the easiest solution would be to
> use a fixed Zope 2.8.x version.
>
> Alternatively, you could fix Zope 2.8.1 yourself. For this, I added
> (in our local copy) in ".../Products/PluggableIndexes/common/UnIndex.py":
>
>
> # DM 2005-08-25: compatibility
> from ComputedAttribute import ComputedAttribute
> ...
>     # DM 2005-08-25: backward compatibility -- overridden at instance level
>     def _length(self):
>         length = self._length = BTrees.Length.Length(len(self._index))
>         return length
>     _length = ComputedAttribute(_length)
>
> The second hunk can go (e.g.) after the definition of "__len__".
>
> --
> Dieter
>