code: def test_cubical(self):
      G = nx.cubical_graph()
      assert list(nx.clustering(G, weight="weight").values()) == [
          0,
          0,
          0,
          0,
          0,
          0,
          0,
          0,
      ]
      assert nx.clustering(G, 1) == 0
      assert list(
          nx.clustering(G, [1, 2], weight="weight").values()
      ) == [0, 0]
      assert nx.clustering(G, 1, weight="weight") == 0
      assert nx.clustering(G, [1, 2], weight="weight") == {1: 0, 2: 0}
  
imports: import pytest
  import networkx
label_desc: Use image node_id 4 for calling the TestWeightedClustering obj's underlying member method code with example usage: obj.test_cubical() without return types