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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 GetHashObject(self):
 """Returns a `Hash` object with appropriate fields filled-in."""

    hash_object = rdf_crypto.Hash()
    hash_object.num_bytes = self._bytes_read
    for algorithm in self._hashers:
      setattr(hash_object, algorithm, self._hashers[algorithm].digest())
    return hash_object