docs: def is_course_complete(last_update):
      """
      Determine is the course is likely to have been terminated or not.
  
      We return True if the timestamp given by last_update is 30 days or older
      than today's date.  Otherwise, we return True.
  
      The intended use case for this is to detect if a given courses has not
      seen any update in the last 30 days or more.  Otherwise, we return True,
      since it is probably too soon to declare the course complete.
      """
      rv = False
      if last_update >= 0:
          delta = time.time() - last_update
          max_delta = total_seconds(datetime.timedelta(days=30))
          if delta > max_delta:
              rv = True
      return rv