Function returning SETOF using plpythonu

Hi,

Is it possible to return rows from a function written in plpythonu using 
SETOF?

Example:
CREATE FUNCTION "test_python_setof"()
RETURNS SETOF text AS '   records=plpy.execute("SELECT name FROM interface");   return records
' LANGUAGE 'plpythonu';

With this code is returning the object from the execution:
<PLyResult object at 0xb703e458>

Best regards,
Luís Sousa