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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 lt(self, v, limit=None, offset=None):
 """Returns the list of the members of the set that have scores less than v. """

        if limit is not None and offset is None:
            offset = 0
        return self.zrangebyscore(self._min_score, "(%f" % v,
                start=offset, num=limit)