[Zope] get property of type 'list'

Hi! I add a list property to a DTML document of type 'tokens' (e.g. '[1, 2, 3]') wenn i try to retrieve it with _.getitem i get '[1,' '2,' '3]' instead of '1' '2' '3' How can I get Zope to interpret my property like a list not a string or whatever else? Thank you in advance!