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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 complete(self, text, state):
 """The actual completion method This method is not meant to be overridden. Override the completelist method instead. It will make your life much easier. For more detail see documentation for readline.set_completer """

        if text != self.text:
            self.matches = self.completelist(text)
            self.text = text
        try:
            return self.matches[state]
        except IndexError:
            return None