[Zope-dev] two hard questions

[Casey Duncan]

On Wednesday 06 March 2002 07:27 am, Tim McLaughlin allegedly wrote:
> Firstly, I'm trying to return a lazy list to a dtml-in, but it seems
> that the __getitems__ are all called up front....  This is the class and
> the print statement shows up in debugging before any debugging output
> from within the dtml-in:
[snip code]
> Does this mean that dmtl-in touches all of the objects first for some
> reason?  Or am I missing something?

My guess is that you have a sort attribute on your dtml-in, which would touch 
everything in the sequence up front.

> Second hard ?.....  Is there any way to wrap a Folder subclassed
> instance within another class so that I can override some methods on an
> instance by instance basis?  I tried doing a .__class__ replacement, but
> for whatever reason, Zope machinery seems to keep it from taking effect.
>  Any ideas?  I've tried about 5 different approaches to no avail :(

I'm not sure how (or why) you would wrap a class around an instance. In order 
to override methods on an instance by instance basis, you would most probably 
need to create a object proxy wrapper that override __getattr__ so that it 
can fire off the right methods.

If these methods are accessed TTW, then you could just use __bobo_traverse__ 
for this too.

Maybe restate the problem in a different way.

/---------------------------------------------------\
  Casey Duncan, Sr. Web Developer
  National Legal Aid and Defender Association
  c.duncan@nlada.org
\---------------------------------------------------/