Or if I test the script with the following value for the parameter - [1,2,3,4,5] - I get: I guess, you're using the "test" tab from the manage interface. The problem is that no matter what you introduce there, it's always being taken as a string. There is no way at that point to tell Zope that you're passing a list.

To really test your script you have to create a dtml-method and call the script: <dtml-var "foo([1,2,3,4,5])"> Regards, Josef.