code: def test_TSP_unweighted():
      G = nx.cycle_graph(9)
      path = nx_app.traveling_salesman_problem(
          G, nodes=[3, 6], cycle=False
      )
      assert path in ([3, 4, 5, 6], [6, 5, 4, 3])
  
      cycle = nx_app.traveling_salesman_problem(G, nodes=[3, 6])
      assert cycle in ([3, 4, 5, 6, 5, 4, 3], [6, 5, 4, 3, 4, 5, 6])
  
imports: import random
  import pytest
  import networkx
  import networkx.algorithms.approximation
label_desc: Use image node_id 7 for calling a global function with example usage: test_TSP_unweighted() without return types