Sudhir,

Hi...

It's natural to want to do this in DTML... but probably not the best
idea.  I know it's a lot to chew to have to use Python to do stuff like
this (you don't), but it would make your life probably a lot easier to
do this in an external method or a Python method.

That said (untested),

<dtml-call "REQUEST.set('count', 1)">

<dtml-in AuthorList>
   <dtml-let author="_['sequence-item']">
    <dtml-in "BookList(author)">
      <dtml-if sequence-start>
        <dtml-var count>  <dtml-var sequence-item> <dtml-var author>
      <dtml-else>
        <dtml-var count>  <dtml-var sequence-item>
      </dtml-if>
      <dtml-call "REQUEST.set('count', count + 1)">
    </dtml-in>
   </dtml-let>
</dtml-in>
     
I feel dirty now.

Sudhir Kumar wrote:
> 
> How do I keep track of counter in Zope.
> 
> For example, if I want to produce the following output:
> 
> 1.    book1            Author1
> 2.    book2
> 3.    book3
> 4.    book4            Author2
> 5.    book5
> 6.    book6
> 7.    book7            Author3
> 
> i.e. book1, book2, book3 are by Author1, etc.
> 
> I need something like the following
> .......
>     count = 0   <-------------------------------intended
>     <dtml-in   "AuthorList()">
>             <dtml-let   author="sequence-item">
>             <dtml-in  "BookList(author)">
>                   <dtml-if "sequence-index==0">
>                          <dtml-var count> sequence-item <dtml-var
> author>
>                   <dtml-else>
>                          <dtml-var count> sequence-item
>                   count=count+1   <---------------------- intended
>                   </dtml-if>
>              </dtml-in></dtml-let>
>     </dtml-in>
> 
> I do not know how to set count=0, count=count+1 in dtml.
> Any help will be greatly appreciated.
> 
> Thank you,
> -- sudhir
> 
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