def conver_code128b(self, inputData):
  checksum = 104
  for ii, char in enumerate(inputData):
   asciiStr = ord(char)
   if asciiStr >= 32:
    checksum += (asciiStr - 32) * (ii + 1)
   else:
    checksum += (asciiStr + 64) * (ii + 1)
  checksum = checksum % 103
  if checksum < 95:
   checksum += 32
  else:
   checksum += 100
  result = chr(204) + str(inputData) + chr(checksum) + chr(206)
  return result