def reducer_pre_filter(self):
        raise NotImplementedError
Construct a function using the current keras backend that, when given a batch
dataset/ETHPy150Open Yelp/mrjob/mrjob/job.py/MRJob.reducer_pre_filter--crossover with--dataset/ETHPy150Open Rochester-NRT/RocAlphaGo/AlphaGo/models/policy.py/CNNPolicy._model_forward