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