code: def test_nonisomorphism(self):
      # test for nonisomorphism of trees for nx.nonisomorphic_trees()
      def f(x):
          return list(nx.nonisomorphic_trees(x))
  
      trees = f(6)
      for i in range(len(trees)):
          for j in range(i + 1, len(trees)):
              assert not nx.is_isomorphic(trees[i], trees[j])
      trees = f(8)
      for i in range(len(trees)):
          for j in range(i + 1, len(trees)):
              assert not nx.is_isomorphic(trees[i], trees[j])
  
file_path: networkx/networkx/generators/tests/test_nonisomorphic_trees.py
imports: import networkx
  from networkx.utils import edges_equal
label_desc: Use image node_id 2 for calling the TestGeneratorNonIsomorphicTrees obj's underlying member method code with example usage: obj.test_nonisomorphism() and returns: list