def passes_filter(self, item):
        return self.filter(item) and all(
            (getattr(self, slug)(item) for slug in self._fluff_filters)
        )
This is pretty confusing, but there are two mechanisms for having a filter,
dataset/ETHPy150Open dimagi/commcare-hq/corehq/ex-submodules/fluff/calculators.py/Calculator.passes_filter