def cost(self, Y, Y_hat):

        raise NotImplementedError(
            str(type(self)) + " does not implement mlp.Layer.cost.")
Test the sub file entries iteration functionality.
dataset/ETHPy150Open lisa-lab/pylearn2/pylearn2/models/mlp.py/Layer.cost--crossover with--dataset/ETHPy150Open log2timeline/dfvfs/tests/vfs/encrypted_stream_file_entry.py/EncryptedStreamFileEntryTest.testSubFileEntries