text: # Copyright 2019 The KerasTuner Authors
  #
  # 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
  #
  #     https://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.
  """Distribution utilities."""
  
  
  import os
  
  
  def has_chief_oracle():
      """Checks for distributed tuning with a chief Oracle.
  
      `CloudOracle` manages its own distribution so should not set
      "KERASTUNER_ORACLE_IP".
  
      Returns:
          Boolean, whether distributed tuning with a chief Oracle should be run.
      """
      if "KERASTUNER_ORACLE_IP" in os.environ:
          if "KERASTUNER_ORACLE_PORT" not in os.environ:
              raise RuntimeError(
                  'Environment variable "KERASTUNER_ORACLE_IP" was set, '
                  'but "KERASTUNER_ORACLE_PORT" was not. Please specify '
                  "a port."
              )
          if "KERASTUNER_TUNER_ID" not in os.environ:
              raise RuntimeError(
                  'Environment variable "KERASTUNER_ORACLE_IP" was set, '
                  'but "KERASTUNER_TUNER_ID" was not. Please specify '
                  "an ID for each tuner."
              )
          return True
      return False
  
  
  def is_chief_oracle():
      if has_chief_oracle():
          return "chief" in os.environ["KERASTUNER_TUNER_ID"]
      return False
  