@abc.abstractmethod
    def score_docs(self, query_vec, postings_lists, **extra):
        return
Records the rating awarded by the user to the exploration in both the
dataset/ETHPy150Open taherh/pysimsearch/pysimsearch/query_scorer.py/QueryScorer.score_docs--crossover with--dataset/ETHPy150Open oppia/oppia/core/domain/rating_services.py/assign_rating_to_exploration