PL/Python flattens composite types to string?

Hi,

I recently wrote PL/Python code that worked on fields of composite types.

The plpy.execute() command on a SELECT returns a list of nice dictionaries
keyed on field names, containing the fields.  For numeric types, the type
of the dictionary values are as expected.  To my chagrin however, if a
field contains a composite type, it is flattened to a string.

I would have expected a composite type field to be returned as a dictionary
of values of the proper types, keyed on the names of the elements of the
composite type.

I was able to work around this problem in an ugly way, but I can imaging
cases where this would render plpy unsuitable.

I see nothing in the documentation about this
    http://www.postgresql.org/docs/8.4/static/plpython.html
It only talks about passing composite types into and out of functions.

Is this a bug?  This is psql v. 8.1.18 on one machine, and 8.4.1 on another.

Am I somehow doing it wrong?
    -- See attached test

Cheers!

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