@utils.map_over_dataset
def _constant_feature_preprocessor(unused_x, val):
    return {'targets': tf.constant([val], tf.int32), 'inputs': tf.constant([val], tf.int32), 'feature': tf.constant([val], tf.int32)}
@utils.map_over_dataset
def _constant_feature_preprocessor(unused_x, val):
    return {'targets': tf.constant([val], tf.int32), 'inputs': tf.constant([val], tf.int32), 'feature': tf.constant([val], tf.int32)}