code: def test_k5(self):
      G = nx.complete_graph(5)
      assert nx.transitivity(G) == 1
      G.remove_edge(1, 2)
      assert nx.transitivity(G) == 0.875
  
imports: import pytest
  import networkx
label_desc: Use image node_id 4 for calling the TestTransitivity obj's underlying member method code with example usage: obj.test_k5() without return types