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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 vote_count(self):
 """ Returns the total number of votes cast for this poll options. """

        return Vote.objects.filter(
            content_type=ContentType.objects.get_for_model(self),
            object_id=self.id
        ).aggregate(Sum('vote'))['vote__sum'] or 0