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.
  # ==============================================================================
  """Signature constants for SavedModel save and restore operations.
  
  """
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  from tensorflow.python.util.tf_export import tf_export
  
  
  # Key in the signature def map for `default` serving signatures. The default
  # signature is used in inference requests where a specific signature was not
  # specified.
  DEFAULT_SERVING_SIGNATURE_DEF_KEY = "serving_default"
  tf_export("saved_model.signature_constants.DEFAULT_SERVING_SIGNATURE_DEF_KEY"
           ).export_constant(__name__, "DEFAULT_SERVING_SIGNATURE_DEF_KEY")
  
  ################################################################################
  # Classification API constants.
  
  # Classification inputs.
  CLASSIFY_INPUTS = "inputs"
  tf_export("saved_model.signature_constants.CLASSIFY_INPUTS").export_constant(
      __name__, "CLASSIFY_INPUTS")
  
  # Classification method name used in a SignatureDef.
  CLASSIFY_METHOD_NAME = "tensorflow/serving/classify"
  tf_export(
      "saved_model.signature_constants.CLASSIFY_METHOD_NAME").export_constant(
          __name__, "CLASSIFY_METHOD_NAME")
  
  # Classification classes output.
  CLASSIFY_OUTPUT_CLASSES = "classes"
  tf_export(
      "saved_model.signature_constants.CLASSIFY_OUTPUT_CLASSES").export_constant(
          __name__, "CLASSIFY_OUTPUT_CLASSES")
  
  # Classification scores output.
  CLASSIFY_OUTPUT_SCORES = "scores"
  tf_export(
      "saved_model.signature_constants.CLASSIFY_OUTPUT_SCORES").export_constant(
          __name__, "CLASSIFY_OUTPUT_SCORES")
  
  ################################################################################
  # Prediction API constants.
  
  # Predict inputs.
  PREDICT_INPUTS = "inputs"
  tf_export("saved_model.signature_constants.PREDICT_INPUTS").export_constant(
      __name__, "PREDICT_INPUTS")
  
  # Prediction method name used in a SignatureDef.
  PREDICT_METHOD_NAME = "tensorflow/serving/predict"
  tf_export(
      "saved_model.signature_constants.PREDICT_METHOD_NAME").export_constant(
          __name__, "PREDICT_METHOD_NAME")
  
  # Predict outputs.
  PREDICT_OUTPUTS = "outputs"
  tf_export("saved_model.signature_constants.PREDICT_OUTPUTS").export_constant(
      __name__, "PREDICT_OUTPUTS")
  
  ################################################################################
  # Regression API constants.
  
  # Regression inputs.
  REGRESS_INPUTS = "inputs"
  tf_export("saved_model.signature_constants.REGRESS_INPUTS").export_constant(
      __name__, "REGRESS_INPUTS")
  
  # Regression method name used in a SignatureDef.
  REGRESS_METHOD_NAME = "tensorflow/serving/regress"
  tf_export(
      "saved_model.signature_constants.REGRESS_METHOD_NAME").export_constant(
          __name__, "REGRESS_METHOD_NAME")
  
  # Regression outputs.
  REGRESS_OUTPUTS = "outputs"
  tf_export("saved_model.signature_constants.REGRESS_OUTPUTS").export_constant(
      __name__, "REGRESS_OUTPUTS")
  
  ################################################################################
  # Train/Eval API constants.
  # Not exported while export_all_saved_models is in contrib.
  
  SUPERVISED_TRAIN_METHOD_NAME = "tensorflow/supervised/training"
  
  SUPERVISED_EVAL_METHOD_NAME = "tensorflow/supervised/eval"
  