code: def test_empty():
      G = nx.empty_graph(5)
      assert average_clustering(G, trials=len(G) // 2) == 0
  
file_path: networkx/networkx/algorithms/approximation/tests/test_approx_clust_coeff.py
imports: import networkx
  from networkx.algorithms.approximation import average_clustering
label_desc: Use image node_id 5 for calling a global function with example usage: test_empty() without return types