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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def main(self):
 """Urwid main event loop """

        self.loop = urwid.MainLoop(self.top, self.palettes[self.palette_names[0]], screen=self.tui,
                                   handle_mouse=False, input_filter=self.handle_keys,
                                   unhandled_input=self.unhandled)
        self.loop.run()