[Zope] script to create tuple of Objects

[Trevor Toenjes]

I am using Formulator(which requires a tuple) to create a list of objects
and still learning python scripts. and stuck.
I am trying to create a master script to exist in Root that will create a
list of objects from a Folder with a given ObjectType.  like zClasses,
DTML_Methods, or DTML_Docs.

script- tuple_of_items called in Override

##parameters=myFolder, myObjectType
results=[]
for object in container.myFolder.objectValues('myObjectType'):
   tuple = object.title, object.id
   results.append(tuple)
return results


in the Items Override I enter>>
tuple_of_items('idofTargetFolder','DTML_Method')
I get an attribute error.  Please help me with what I have missed?

If I dont pass the parameters and hardcode in the script:
  The form renders properly, but on Submit, I get the error>>
unknown_selection  You selected an item that was not in the list.
What is causing this?

Thank you,
Trevor