def score(self, weight_in_top, weight_in_collection, top_total):
        f = self.N / weight_in_collection
        return weight_in_top * log((1.0 + f) / f, 2) + log(1.0 + f, 2)
dataset/ETHPy150Open tallstreet/Whoosh-AppEngine/src/whoosh/classify.py/Bo1Model.score/swapped operands of `/`