code: def test_non_neighbors(self):
      graph = nx.complete_graph(100)
      pop = random.sample(list(graph), 1)
      nbors = list(nx.non_neighbors(graph, pop[0]))
      # should be all the other vertices in the graph
      assert len(nbors) == 0
  
      graph = nx.path_graph(100)
      node = random.sample(list(graph), 1)[0]
      nbors = list(nx.non_neighbors(graph, node))
      # should be all the other vertices in the graph
      if node != 0 and node != 99:
          assert len(nbors) == 97
      else:
          assert len(nbors) == 98
  
      # create a star graph with 99 outer nodes
      graph = nx.star_graph(99)
      nbors = list(nx.non_neighbors(graph, 0))
      assert len(nbors) == 0
  
      # disconnected graph
      graph = nx.Graph()
      graph.add_nodes_from(range(10))
      nbors = list(nx.non_neighbors(graph, 0))
      assert len(nbors) == 9
  
imports: import random
  import pytest
  import networkx
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 23 for calling the TestFunction obj's underlying member method code with example usage: obj.test_non_neighbors() without return types