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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 _initialize(self, request):
 """Initializes the exporter rpc stream."""


        # Add node information on the first request dispatched on a stream.
        request.node.MergeFrom(self._node)
        request.resource.MergeFrom(self._resource)
        self._initial_request = request

        self._rpc.open()
        self._initialized = True