new_contents: import sys
  from kinto_client import cli_utils
  
  
  DEFAULT_SERVER = "https://kinto-ota.dev.mozaws.net/v1/"
  
  
  def _print(msg):
      sys.stdout.write(msg)
      sys.stdout.flush()
  
  
  def upgrade(client):
      _print('Scanning collection...\n')
      count = 0
  
      for record in client.get_records():
          _print('.')
  
          attachment = record.get('attachment')
          if attachment is None:
              continue
  
          original = attachment.get('original')
          old_original = record.get('original')
  
          if original is None and old_original is not None:
              record['attachment']['original'] = old_original
              del record['original']
              client.update_record(record)
              count += 1
  
      _print('\nChanged %d records\n' % count)
  
  
  def main():
      parser = cli_utils.add_parser_options(
          description='Upgrade the attachment structure',
          default_server=DEFAULT_SERVER)
      args = parser.parse_args()
      client = cli_utils.create_client_from_args(args)
      upgrade(client)
  
  
  if __name__ == '__main__':
      main()
  
subject: upgrade script