[Zope] Accessing ZSQL result object contents via python:repeat

I have an ZSQL result, which I am iterating over using tal:repeat. I can access the column values using tal syntax like item/col1 and item/col2. But how do I access thes values via Python? I've tried python:repeat['item'].col1, python:repeat['item'].col1(), and python:repeat['item']['col1'], but none of those work. What's the magic recipe? Thanks, Andrew -- http://www.acooke.org/andrew