code: def recognize_byte(self, image, timeout=10):
          
          result = []
  
          alpr = subprocess.Popen(
              self._cmd,
              stdin=subprocess.PIPE,
              stdout=subprocess.PIPE,
              stderr=subprocess.DEVNULL
          )
  
          # send image
          try:
              # pylint: disable=unused-variable
              stdout, stderr = alpr.communicate(input=image, timeout=10)
              stdout = io.StringIO(str(stdout, 'utf-8'))
          except subprocess.TimeoutExpired:
              _LOGGER.error("Alpr process timeout!")
              alpr.kill()
              return None
  
          tmp_res = {}
          while True:
              line = stdout.readline()
              if not line:
                  if len(tmp_res) > 0:
                      result.append(tmp_res)
                  break
  
              new_plate = self.__re_plate.search(line)
              new_result = self.__re_result.search(line)
  
              # found a new plate
              if new_plate and len(tmp_res) > 0:
                  result.append(tmp_res)
                  tmp_res = {}
                  continue
  
              # found plate result
              if new_result:
                  try:
                      tmp_res[new_result.group(1)] = float(new_result.group(2))
                  except ValueError:
                      continue
  
          _LOGGER.debug("Process alpr with result: %s", result)
          return result
docs: Process a byte image buffer.