code: def decode(byte_str, allow_none=False):
      
      if byte_str is None and allow_none:
          return ""
  
      if not isinstance(byte_str, bytes):
          raise ValueError(
              "The argument {} must be a bytes object.".format(byte_str))
      if sys.version_info >= (3, 0):
          return byte_str.decode("ascii")
      else:
          return byte_str
docs: Make this unicode in Python 3, otherwise leave it as bytes.
  
      Args:
          byte_str: The byte string to decode.
          allow_none: If true, then we will allow byte_str to be None in which
              case we will return an empty string. TODO(rkn): Remove this flag.
              This is only here to simplify upgrading to flatbuffers 1.10.0.
  
      Returns:
          A byte string in Python 2 and a unicode string in Python 3.