[Zope] dtml-while

[Michel Pelletier]

Diego Rodrigo Neufert wrote:
> 
> Why there isnt a dtml-while function in Zope?

DTML is not meant to be used for general purpose, logic programming. 
It's a presentation and layout language.  Additionally, a while
construct would allow you to create indeterminate loops:

<dtml-while 1>
 ...
</dtml-while>

and you're not allowed to loop indefinately in DTML.  It's against the
rules.  <dtml-in> does all the looping you need over a python sequence,
since DTML doesn't let you build infinite sequences, all loops
terminate.

The solution to your problem is to you Python Methods.

http://dev.zope.org/Members/4am/PythonMethod

Python does have a while construct and is indented for programming
logic.

-Michel