def lock_multi(self, keys, ttl=0):
        return _Base.lock_multi(self, keys, ttl=ttl)
compute deviance scores on ``X_test`` and ``y_test``.
dataset/ETHPy150Open couchbase/couchbase-python-client/couchbase/bucket.py/Bucket.lock_multi--crossover with--dataset/ETHPy150Open scikit-learn/scikit-learn/examples/ensemble/plot_gradient_boosting_oob.py/heldout_score