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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 new_node(self):
 """Adds a new, blank node to the graph. Returns the node id of the new node."""

        node_id = self.generate_node_id()

        node = {'id': node_id,
                'edges': [],
                'data': {}
        }

        self.nodes[node_id] = node

        self._num_nodes += 1

        return node_id