[Zope] string to list?

[Nitesh Dhanjani]

Hello,

I have a Z SQL method which returns me a string like {{"a"},{"b"},{"c"}}

Is there anyway I can write a dtml-in loop to pick out each element from
the string? I want to be able to do something like:

<dtml-in my_zsql_method_which_returns_a_string>
<dtml-var element>,
</dtml-in>

and that should give me "a,b,c".

Is this possible? Or do I need to write an external python method to
return a list["a", "b", "c"]  given the string above?

Thanks!
nitesh