bsddb - help needed with btflags values for Python

[sconnoll]

import bsddb

bsddb.btopen(file, flag='c', mode=438, btflags=0, cachesize=None,
maxkeypage=None, minkeypage=None, pgsize=None, lorder=None)

Can anyone help me with the values to use for btflags? I'd like to
tell the database manager that I want to allow duplicate values. The
ORACLE Berkeley documentation addresses C (not Python), so I can't
find the approprate btflags values documented for Python anywhere.

Help!!!!......and thanks in advance.

Sean