docs: def print_status(total, current, start_time=None):
      """
      Show how much work was done / how much work is remaining.
  
      Parameters
      ----------
      total : float
          The total amount of work
      current : float
          The work that has been done so far
      start_time : int
          The start time in seconds since 1970 to estimate the remaining time.
      """
      percentage_done = float(current) / total
      sys.stdout.write("\r%0.2f%% " % (percentage_done * 100))
      if start_time is not None:
          current_running_time = time.time() - start_time
          remaining_seconds = current_running_time / percentage_done
          tmp = datetime.timedelta(seconds=remaining_seconds)
          sys.stdout.write("(%s remaining)   " % str(tmp))
      sys.stdout.flush()