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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 only_to(self, status):
 """ Returns a QuerySet of user objects who have created a relationship to the given user, but which the given user has not reciprocated """

        from_relationships = self.get_relationships(status)
        to_relationships = self.get_related_to(status)
        return to_relationships.exclude(pk__in=from_relationships.values_list('pk'))