code: def altimeter(alt: Number, unit: str = 'inHg') -> str:
      
      ret = 'Altimeter '
      if not alt:
          ret += 'unknown'
      elif unit == 'inHg':
          ret += core.spoken_number(alt.repr[:2]) + ' point ' + core.spoken_number(alt.repr[2:])
      elif unit == 'hPa':
          ret += core.spoken_number(alt.repr)
      return ret
docs: Format altimeter details into a spoken word string