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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 set_meta_rdf(self, rdf, fmt='n3'):
 """Set the metadata for this Point in rdf fmt """

        evt = self._client._request_point_meta_set(self._type, self.__lid, self.__pid, rdf, fmt=fmt)
        self._client._wait_and_except_if_failed(evt)