docs: def parseDiskStatLine(L):
      """
      Parse a single line from C{/proc/diskstats} into a two-tuple of the name of
      the device to which it corresponds (ie 'hda') and an instance of the
      appropriate record type (either L{partitionstat} or L{diskstat}).
      """
      parts = L.split()
      device = parts[2]
      if len(parts) == 7:
          factory = partitionstat
      else:
          factory = diskstat
      return device, factory(*map(int, parts[3:]))