from tensorflow.contrib import layers


    if n_classes < 2:
      raise ValueError("n_classes should be greater than 1. Given: {}".format(
          n_classes))
    target_column = layers.multi_class_target(
        n_classes=n_classes,
        weight_column_name=weight_column_name)
    super(DNNLinearCombinedClassifier, self).__init__(
