python - PostgreSQL writes stdout messages to stderr -

i'm building python (pyqt) application deals bulk loads postgresql 9.4 database requires use of psql commands within process. application captures both stdout , stderr , displays them differently, appears postgresql sends notice , other messages stderr, while expect them appear on stdout since aren't critical , aren't errors. makes extremely difficult correctly pull out messages care , ones don't.

is there config setting i'm missing separates two, or stuck this?

this q&a 17 years ago little help: http://www.postgresql.org/message-id/199812310042.taa23174@candle.pha.pa.us