[Zope-dev] Re: TALES idea: tuple unpacking

[Philipp von Weitershausen]

Richard Jones wrote:
> During the Melbourne Zope3 Sprint, someone ran up against a situation where 
> they'd have liked to have TALES perform a tuple unpacking like Python can. 
> I've just run into a similar situation :)
> 
> Say a method listFilesByUser returns a list of (user, [files]) it'd be nice to 
> be able to::
> 
>    tal:repeat="user,files here/listFilesByUser"
> 
> or similar. Currently we would have to use a python: expression to manually 
> unpack the tuple. Kinda yucky.

I agree that it is 'yucky', but I have to disagree with your proposed
solution. I would rather suggest making TALES aware of integer indexes
for sequences. Example::

   <tal:block repeat="user_files here/listFilesByUser">
     User: <tal:dummy replace="user_files/0" />
     File: <tal:dummy replace="user_files/1" />
   </tal:block>

Regards,

Phil