code: def unpackb(packed, **kwargs):
      
      unpacker = Unpacker(None, **kwargs)
      unpacker.feed(packed)
      try:
          ret = unpacker._unpack()
      except OutOfData:
          raise UnpackValueError("Data is not enough.")
      if unpacker._got_extradata():
          raise ExtraData(ret, unpacker._get_extradata())
      return ret
docs: Unpack an object from `packed`.
  
      Raises `ExtraData` when `packed` contains extra bytes.
      See :class:`Unpacker` for options.