[Zope] Appending to a tokens property

Zopists, I a m trying to keep a list inside a tokens property. I am trying to add an item to the end of the list like so: <!--#call "propertysheets.myproperties.manage_changeProperties( tokenProperty=tokenProperty + newtoken)"--> I've looked for an "append" method and appendHeader is the only sort of thing in the DTML guide. Any ideas on how to d othis in DTML like this. I suppose knowing Python's syntax for mereging two lists would be key here, so I'm off to find that. Just in case anyone has a great Zopeified way to do this, let me know. All my best, Jason Spisak webmaster@mtear.com