calendared.py

   service = build('calendar', 'v3', credentials=creds)
   try:
      calendar_results = service.calendarList().list(
                maxResults=100).execute()
      calendars = calendar_results.get('items', [])
      for calendar in calendars:
        calendar_with_id.append((calendar['id'], calendar['summary']))
        print(calendar['id'])
      except Exception as exception:
        print(exception)