def __delete__(self, instance):
        self._set_instance_tag_cache(instance, '')
Returns a normalized poll whose numbers sum to 1.
dataset/ETHPy150Open amarandon/smeuhsocial/apps/tagging/fields.py/TagField.__delete__--crossover with--dataset/ETHPy150Open j3camero/canada-election-forecast/poll.py/Poll.CopyAndNormalize