[Zope] tal loop to render table

[Dennis Schulz]

I would like to build a tal loop that renders a list of elements 
(widgets in my case) in a table.
(for example I have a list of 9 items, then it renders a table: five 
rows with 2,2,2,2,1 items)
the table has 2 columns, so i would need to open and close the table row 
every second item.
I tried to check with a condition if the row is odd or even, but 
unopened and unclosed tags are not valid.

Is there any possibiliy to do this with tal?

Dennis