def __set__(self, instance, value):
        if instance is None:
            raise AttributeError(_('%s can only be set on instances.') % self.name)
        if settings.FORCE_LOWERCASE_TAGS and value is not None:
            value = value.lower()
        self._set_instance_tag_cache(instance, value)
Form the intersection of two Index objects. Sortedness of the result is
dataset/ETHPy150Open hzlf/openbroadcast/website/tagging_ng/fields.py/TagField.__set__--crossover with--dataset/ETHPy150Open pydata/pandas/pandas/indexes/range.py/RangeIndex.intersection