code: def test_cycle_graph(self):
      ans = nx.average_shortest_path_length(nx.cycle_graph(7))
      assert ans == pytest.approx(2, abs=1e-7)
  
imports: import pytest
  import networkx
label_desc: Use image node_id 1 for calling the TestAverageShortestPathLength obj's underlying member method code with example usage: obj.test_cycle_graph() without return types