code: def test_list_neighbours():
      """test the generation of neighbours list"""
      bg = basic_graph()
      nl = bg.list_of_neighbors()
      assert len(nl) == bg.V
      for ni in nl:
          assert len(ni) == 2
  
imports: import numpy
  import numpy.random
  from numpy.testing import assert_almost_equal, assert_array_almost_equal, assert_array_equal
  from ..graph import WeightedGraph, complete_graph, concatenate_graphs, eps_nn, knn, mst, wgraph_from_3d_grid, wgraph_from_adjacency, wgraph_from_coo_matrix
label_desc: Use image node_id 46 for calling a global function with example usage: test_list_neighbours() without return types