text: #!/usr/bin/env python
  #
  # Copyright 2016 Google Inc. 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.
  """This example gets all content metadata key hierarchies.
  """
  
  # Import appropriate modules from the client library.
  from googleads import ad_manager
  
  
  def main(client):
    # Initialize appropriate service.
    content_metadata_key_hierarchy_service = client.GetService(
        'ContentMetadataKeyHierarchyService', version='v201805')
  
    # Create a statement to select content metadata key hierarchies.
    statement = ad_manager.StatementBuilder(version='v201805')
  
    # Retrieve a small amount of content metadata key hierarchies at a time,
    # paging through until all content metadata key hierarchies have been
    # retrieved.
    while True:
      response = (
          content_metadata_key_hierarchy_service
          .getContentMetadataKeyHierarchiesByStatement(
              statement.ToStatement()))
      if 'results' in response and len(response['results']):
        for content_metadata_key_hierarchy in response['results']:
          # Print out some information for each content metadata key hierarchy.
          print('Content metadata key hierarchy with ID "%d" and name "%s" was '
                'found.\n' % (content_metadata_key_hierarchy['id'],
                              content_metadata_key_hierarchy['name']))
        statement.offset += statement.limit
      else:
        break
  
    print '\nNumber of results found: %s' % response['totalResultSetSize']
  
  
  if __name__ == '__main__':
    # Initialize client object.
    ad_manager_client = ad_manager.AdManagerClient.LoadFromStorage()
    main(ad_manager_client)
  