from Screen import Screen # a clock display dialog class ClockDisplay(Screen): def okbutton(self): self.session.close() def __init__(self, session, clock): Screen.__init__(self, session) self["theClock"] = clock b = Button("bye") b.onClick = [ self.okbutton ] self["okbutton"] = b self["title"] = Header("clock dialog: here you see the current uhrzeit!")