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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def unpackb(packed, **kwargs):
 """ Unpack an object from `packed`. Raises `ExtraData` when `packed` contains extra bytes. See :class:`Unpacker` for options. """

    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