code: def test_disconnected(self, method):
      pytest.importorskip("scipy")
      G = nx.Graph()
      nx.add_path(G, range(0, 10, 2))
      nx.add_path(G, range(1, 10, 2))
      order = nx.spectral_ordering(G, method=method)
      assert set(order) == set(G)
      seqs = [
          list(range(0, 10, 2)),
          list(range(8, -1, -2)),
          list(range(1, 10, 2)),
          list(range(9, -1, -2)),
      ]
      assert order[:5] in seqs
      assert order[5:] in seqs
  
imports: from math import sqrt
  import pytest
  import networkx
label_desc: Use image node_id 8 for calling the TestSpectralOrdering obj's underlying member method code with example usage: obj.test_disconnected(method) without return types