new_contents: from apiclient.discovery import build
  from httplib2 import Http
  from oauth2client import file, client, tools
  from oauth2client.service_account import ServiceAccountCredentials
  import pprint
  
  scopes = 'https://www.googleapis.com/auth/calendar'
  
  credentials = ServiceAccountCredentials.from_json_keyfile_name(
      'client_secret.json', scopes)
  
  http_auth = credentials.authorize(Http())
  
  CAL = build('calendar', 'v3', http=credentials.authorize(Http()))
  
  def print_calendars():
  
      page_token = None
  
      while True:
          calendar_list = CAL.calendarList().list(pageToken=page_token).execute()
  
          for calendar_list_entry in calendar_list['items']:
              pprint.pprint(calendar_list_entry)
  
          page_token = calendar_list.get('nextPageToken')
          
          if not page_token:
              break
  
  print_calendars()
subject: print calendars