text: # Copyright 2016 The TensorFlow Authors. All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  # ==============================================================================
  """Keras built-in metrics functions."""
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  # Metrics functions.
  from tensorflow.contrib.keras.python.keras.metrics import binary_accuracy
  from tensorflow.contrib.keras.python.keras.metrics import binary_crossentropy
  from tensorflow.contrib.keras.python.keras.metrics import categorical_accuracy
  from tensorflow.contrib.keras.python.keras.metrics import categorical_crossentropy
  from tensorflow.contrib.keras.python.keras.metrics import cosine_proximity
  from tensorflow.contrib.keras.python.keras.metrics import hinge
  from tensorflow.contrib.keras.python.keras.metrics import kullback_leibler_divergence
  from tensorflow.contrib.keras.python.keras.metrics import mean_absolute_error
  from tensorflow.contrib.keras.python.keras.metrics import mean_absolute_percentage_error
  from tensorflow.contrib.keras.python.keras.metrics import mean_squared_error
  from tensorflow.contrib.keras.python.keras.metrics import mean_squared_logarithmic_error
  from tensorflow.contrib.keras.python.keras.metrics import poisson
  from tensorflow.contrib.keras.python.keras.metrics import sparse_categorical_crossentropy
  from tensorflow.contrib.keras.python.keras.metrics import sparse_top_k_categorical_accuracy
  from tensorflow.contrib.keras.python.keras.metrics import squared_hinge
  from tensorflow.contrib.keras.python.keras.metrics import top_k_categorical_accuracy
  
  # Auxiliary utils.
  # pylint: disable=g-bad-import-order
  from tensorflow.contrib.keras.python.keras.metrics import deserialize
  from tensorflow.contrib.keras.python.keras.metrics import serialize
  from tensorflow.contrib.keras.python.keras.metrics import get
  
  del absolute_import
  del division
  del print_function
  