code: def test_eps_1():
      x = basicdata()
      G = eps_nn(x, 1.0)
      D = G.weights
      assert np.size(D) == 16
      assert (D < 1).all()
  
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 9 for calling a global function with example usage: test_eps_1() without return types