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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 run_loop(self):
 """ Main entry point for running in interactive mode. """

        self.root_command.prog = ''
        history_file = self.load_history()
        rendering.vtmlprint(self.intro)
        try:
            self.loop()
        finally:
            readline.write_history_file(history_file)