code: def test_cycle(self):
      G = nx.cycle_graph(5)
      L = nx.line_graph(G)
      assert nx.is_isomorphic(L, G)
  
imports: import pytest
  import networkx
  from networkx.generators import line
  from networkx.utils import edges_equal
label_desc: Use image node_id 3 for calling the TestGeneratorLine obj's underlying member method code with example usage: obj.test_cycle() without return types