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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 has_partition_hash(self):
 """ Determines whether this Data has partition hash or not. :return: (bool), ``true`` if Data has partition hash, ``false`` otherwise. """

        return self._buffer is not None \
               and len(self._buffer) >= HEAP_DATA_OVERHEAD \
               and unpack_from(FMT_BE_INT, self._buffer, PARTITION_HASH_OFFSET)[0] != 0