def _get_value_score()

in heap.py [0:0]


    def _get_value_score(self, cached_score_data):
        if not self.use_score_caching:
            return self.value_score_function(cached_score_data.value)
        else:
            if cached_score_data.timestamp != self.timestep:
                cached_score_data.score = self.value_score_function(cached_score_data.value)
                cached_score_data.timestamp = self.timestep
            return cached_score_data.score