code: def test_two_nodes(self, method):
      pytest.importorskip("scipy")
      G = nx.Graph()
      G.add_edge(0, 1, weight=1)
      A = nx.laplacian_matrix(G)
      assert nx.algebraic_connectivity(
          G, tol=1e-12, method=method
      ) == pytest.approx(2, abs=1e-7)
      x = nx.fiedler_vector(G, tol=1e-12, method=method)
      check_eigenvector(A, 2, x)
  
imports: from math import sqrt
  import pytest
  import networkx
label_desc: Use image node_id 5 for calling the TestAlgebraicConnectivity obj's underlying member method code with example usage: obj.test_two_nodes(method) without return types