how do you handle result sets in libpq (pypgsql)

is it possible to use a result set(record) returned by a function  if so 
what is the syntax
i get the following error

''' libpq.OperationalError : ERROR:  set-valued function called in 
context that cannot accept a set
CONTEXT:  PL/pgSQL function "dialup_checkjobtask" line 15 at return next

from this function

CREATE OR REPLACE FUNCTION public.dialup_checkjobtask(varchar, int4)
  RETURNS SETOF tmpdialuptj AS
'
declare answer integer;
             res record;          
          
BEGIN
  select * from tmpDIALUPTJ  into res;
  res.job_id = 0; 
  res.task_id = 0; 
 
  select count(*) from jobs where jobnumber =  $1 and isdeleted = 0 into 
answer;
  if (answer > 0) then select job_id  from jobs  where jobnumber =  $1 
and isdeleted = 0 into res.job_id;  else res.job_id = 0; end if;
 
  select count(*) from tasks where number =  $2 and isdeleted = 0 into 
answer;
  if (answer > 0) then  select task_id  from tasks  where number =  $2  
and isdeleted = 0 into res.task_id; else res.task_id =0; end if;
 
  RETURN NEXT res;
  RETURN;
END;
'
  LANGUAGE 'plpgsql' VOLATILE;


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