[Zope] Tricky usage of string to integer conversion

[Brian K. Holdsworth]

I am trying to do the following:

<dtml-let x:int="REQUEST.get('prod_config')"
          item="_[REQUEST.get('prod_id')]"
          price="item.price_list[x]">
    <INPUT type="hidden" name="chargetotal" value="<dtml-var price>">
</dtml-let>

The prod_config variable is a number (returned as a string) from a SELECT
list.  The prod_id variable is the id of an object in the same folder as
this method that has a price_list attribute.  price_list is a list of
strings representing prices.

This results in a "Name Error" where Zope cannot find "x".  If I change line
3 to this:

          price="item.price_list['x']">

it fixes the Name Error, but then I get a "Sequence Index must be an
integer" error on price_list['x'].  I would have thought the use of "x:int"
in my <dtml-let> would take care of this issue.  Seems I can't win!

Does anyone know the correct way to do this lookup?

Best Regards,
Brian Holdsworth