[Zope] tuple

hi, maybe smd. would help me with the following: <dtml-call "REQUEST.set('fitting',{})"> <dtml-in sqlGetFit> <dtml-call "fitting[compl_id]=amnt"> </dtml-in> zope would't want make a tuple for me, I'm having no problems making a list though. any thoughts on what I am doing wrong? thank you. -- Pavel Cosmos-Mebel, Ltd.