new_contents: #! /usr/bin/env python
  import os
  import sys
  
  import httplib2
  from apiclient.discovery import build  # pylint: disable=import-error
  from oauth2client.client import flow_from_clientsecrets
  from oauth2client.file import Storage
  from oauth2client.tools import argparser
  from oauth2client.tools import run_flow
  
  
  # The CLIENT_SECRETS_FILE variable specifies the name of a file that contains
  # the OAuth 2.0 information for this application, including its client_id and
  # client_secret. You can acquire an OAuth 2.0 client ID and client secret from
  # the {{ Google Cloud Console }} at
  # {{ https://cloud.google.com/console }}.
  # Please ensure that you have enabled the YouTube Data API for your project.
  # For more information about using OAuth2 to access the YouTube Data API, see:
  #   https://developers.google.com/youtube/v3/guides/authentication
  # For more information about the client_secrets.json file format, see:
  #   https://developers.google.com/api-client-library/python/guide/aaa_client_secrets
  CLIENT_SECRETS_FILE = 'client_secrets.json'
  
  # This variable defines a message to display if the CLIENT_SECRETS_FILE is
  # missing.
  MISSING_CLIENT_SECRETS_MESSAGE = """
  WARNING: Please configure OAuth 2.0
  
  To make this sample run you will need to populate the client_secrets.json file
  found at:
  
     %s
  
  with information from the {{ Cloud Console }}
  {{ https://cloud.google.com/console }}
  
  For more information about the client_secrets.json file format, please visit:
  https://developers.google.com/api-client-library/python/guide/aaa_client_secrets
  """ % os.path.abspath(os.path.join(os.path.dirname(__file__),
                                     CLIENT_SECRETS_FILE))
  
  # This OAuth 2.0 access scope allows for full read/write access to the
  # authenticated user's account.
  YOUTUBE_READ_WRITE_SCOPE = 'https://www.googleapis.com/auth/youtube'
  YOUTUBE_API_SERVICE_NAME = 'youtube'
  YOUTUBE_API_VERSION = 'v3'
  
  
  def main():
      flow = flow_from_clientsecrets(
          CLIENT_SECRETS_FILE,
          message=MISSING_CLIENT_SECRETS_MESSAGE,
          scope=YOUTUBE_READ_WRITE_SCOPE
      )
  
      storage = Storage('%s-oauth2.json' % sys.argv[0])
      credentials = storage.get()
  
      if credentials is None or credentials.invalid:
          flags = argparser.parse_args()
          credentials = run_flow(flow, storage, flags)
  
      youtube = build(
          YOUTUBE_API_SERVICE_NAME,
          YOUTUBE_API_VERSION,
          http=credentials.authorize(httplib2.Http())
      )
  
      playlists = youtube.playlists().list(part='snippet', mine=True).execute()
      print(len(playlists))
  
  
  if __name__ == '__main__':
      exit(main())
  
subject: Add boilerplate to access youtube api