traceback with warning/error messages

[Jean Brouwers]

Sporadically, a message like this one shows up in our wxPython
application:

(main.py:3182): Gtk-WARNING **: gtk_menu_attach_to_widget(): menu
already attached to GtkMenuItem

Is possible but tedious to find the cause of the message by inserting
print statements.  Is there an easier way, e.g. a traceback in Python
when lower level messages occur?

/Jean Brouwers

PS) This is wxPython 2.4.1.2 and Python 2.3.2 on Linux.