Update:
it might be not plpython, but similar to the plperl bug I found last time.
The script which can produce the bug:
create table test (id int, date timestamp);
create or replace function trigger_test() returns trigger as $$
plpy.info(TD['new'])
return 'MODIFY'
$$ language plpytho
Hello!
create or replace function trigger_keywords_maintain() returns trigger as $$
return 'MODIFY'
$$ language plpythonu;
update table set id = id where id = 7
ERROR: invalid input syntax for type timestamp: "2005-05-03
14:07:33,279213"
I see that Python's timestamp format is no