text: # Copyright 2018 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.
  # ==============================================================================
  """Common IO utils used in offline metric computation.
  """
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  import csv
  
  
  def write_csv(fid, metrics):
    """Writes metrics key-value pairs to CSV file.
  
    Args:
      fid: File identifier of an opened file.
      metrics: A dictionary with metrics to be written.
    """
    metrics_writer = csv.writer(fid, delimiter=',')
    for metric_name, metric_value in metrics.items():
      metrics_writer.writerow([metric_name, str(metric_value)])
  