Array of composites passed to plpythonu function

example.pgsql

ROLLBACK;
BEGIN;

CREATE TABLE mytable (
    col1 INTEGER
,   col2 BOOLEAN
,   col3 TEXT
);

INSERT INTO mytable VALUES
    (1, TRUE , 'Text')
,   (2, NULL , 'Text')
,   (3, FALSE, NULL  )
;

CREATE FUNCTION myfunc (ts mytable[]) RETURNS VOID
    LANGUAGE plpythonu
AS $plpythonu$

    from pprint import pformat
    plpy.notice(pformat(ts))
    if ts:
        plpy.notice(type(ts[0]))

$plpythonu$;

SELECT myfunc(array_agg(t)) FROM mytable AS t;

-- psql:local/script.pgsql:28: NOTICE:  ['(1,t,Text)', '(2,,Text)', '(3,f,)']
-- psql:local/script.pgsql:28: NOTICE:  <type 'str'>
--  myfunc
-- --------
--
-- (1 row)

SELECT myfunc(ARRAY[t]) FROM mytable AS t;

-- psql:local/script.pgsql:29: NOTICE:  ['(1,t,Text)']
-- psql:local/script.pgsql:29: NOTICE:  <type 'str'>
-- psql:local/script.pgsql:29: NOTICE:  ['(2,,Text)']
-- psql:local/script.pgsql:29: NOTICE:  <type 'str'>
-- psql:local/script.pgsql:29: NOTICE:  ['(3,f,)']
-- psql:local/script.pgsql:29: NOTICE:  <type 'str'>
--  myfunc
-- --------
--
--
--
-- (3 rows)

ROLLBACK;