def ask_yesno_question(msg, parent=None):
d = gtk.MessageDialog(buttons=gtk.BUTTONS_YES_NO, parent=parent,
type=gtk.MESSAGE_QUESTION)
d.set_property("text", msg)
if not parent:
d.set_position(gtk.WIN_POS_CENTER_ALWAYS)
r = d.run()
d.destroy()
return r == gtk.RESPONSE_YES
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