PL/Python set returning functions

Hi,

How can I return some rows from my PL/Python function?

I wrote:

dbmail=# create type composite as (id bigint, name text);
CREATE TYPE
dbmail=# create or replace function csrf() returns setof composite as $$
dbmail$# return ((1, "james"), (2, "bob"), (3, "fargus"))
dbmail$# $$ language plpythonu;
CREATE FUNCTION
dbmail=# select csrf();
ERROR:  plpython functions cannot return tuples yet

What's wrong?

--
Thanks,
Eugene Prokopiev