>>> graph.number_operator(3, 1, name="n_offset")
<Tensor: name="n_offset", operation_name="number_operator", shape=(3, 3)>
>>> result = qctrl.functions.calculate_graph(graph=graph, output_node_names=["n_offset"])
>>> result.output["n_offset"]["value"]
array([[1.+0.j, 0.+0.j, 0.+0.j],
[0.+0.j, 2.+0.j, 0.+0.j],
[0.+0.j, 0.+0.j, 3.+0.j]])