code: def test_average_clustering_signed(self):
      G = nx.cycle_graph(3)
      G.add_edge(2, 3)
      G.add_edge(0, 1, weight=-1)
      assert (
          nx.average_clustering(G, weight="weight")
          == (-1 - 1 - 1 / 3) / 4
      )
      assert (
          nx.average_clustering(G, weight="weight", count_zeros=True)
          == (-1 - 1 - 1 / 3) / 4
      )
      assert (
          nx.average_clustering(G, weight="weight", count_zeros=False)
          == (-1 - 1 - 1 / 3) / 3
      )
  
imports: import pytest
  import networkx
label_desc: Use image node_id 4 for calling the TestAverageClustering obj's underlying member method code with example usage: obj.test_average_clustering_signed() without return types