I think I figured it out (though, it wasn't documented). What I needed was to use:
I think that's the correct usage? What I needed was to loop through a selection and then to calculate the sugar pucker information. However, not all atoms from the selection are required for the calculation so some pre-parsing of the residue is needed. It appears that I can specify the state to obtain atom objects from via the get_model command. I hope that is right?
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