code: def get_cool_off_iso8601(delta: timedelta) -> str:
      
  
      seconds = delta.total_seconds()
      minutes, seconds = divmod(seconds, 60)
      hours, minutes = divmod(minutes, 60)
      days, hours = divmod(hours, 24)
  
      days_str = f'{days:.0f}D' if days else ''
  
      time_str = ''.join(
          f'{value:.0f}{designator}'
          for value, designator
          in [
              [hours, 'H'],
              [minutes, 'M'],
              [seconds, 'S'],
          ]
          if value
      )
  
      if time_str:
          return f'P{days_str}T{time_str}'
      return f'P{days_str}'
docs: Return datetime.timedelta translated to ISO 8601 formatted duration for use in e.g. cool offs.