docs: def parse_simple_duration(duration):
      """
      Attepmt to parse an ISO8601 formatted duration, using a naive calculation.
  
      Accepts a ``duration`` which must be an ISO8601 formatted string, and
      assumes 365 days in a year and 30 days in a month for the calculation.
  
      Returns a ``datetime.timedelta`` object.
      """
      elements = _parse_duration_string(_clean(duration))
  
      if not elements:
          raise ParseError()
  
      return _timedelta_from_elements(elements)