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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 reply_to(self, value):
 """The reply to email address :param value: The reply to email address :type value: ReplyTo, str, tuple """

        if isinstance(value, str):
            value = ReplyTo(value, None)
        if isinstance(value, tuple):
            value = ReplyTo(value[0], value[1])
        self._reply_to = value