[Zope] evaluating a "sequence-item" within a dtml-if statement

[Dylan Reinhardt]

On Mon, 2003-09-15 at 09:25, Roger Mallett wrote:
> The code below fails with:  "invalid syntax (line 1).
> 
> 
>     <dtml-in expr="[1,2,3,4,5,6]">
>        <dtml-if expr="&dtml-sequence-item;==3">
>           &dtml-sequence-item;
>        <dtml-else>
>             failed
>        </dtml-if>
>     </dtml-in>
> 

Use the "prefix" attribute any time you need to use a sequence variable
in a Python expression.  Better yet, use them all the time.

Try this:

-----

 <dtml-in "[1,2,3,4,5,6]" prefix=my>
    <dtml-if "my_item==3">
       &dtml-my_item;
    <dtml-else>
       failed
    </dtml-if>
 </dtml-in>

-----

HTH,

Dylan