def close(self):
        self.coverage_store.close()
create a policy object that preprocesses according to feature_list and uses
dataset/ETHPy150Open ooici/pyon/pyon/ion/coverage.py/CoverageMetadataStore.close--crossover with--dataset/ETHPy150Open Rochester-NRT/RocAlphaGo/AlphaGo/models/policy.py/CNNPolicy.__init__