code: def test_relabel_selfloop(self):
      G = nx.DiGraph([(1, 1), (1, 2), (2, 3)])
      G = nx.relabel_nodes(
          G, {1: "One", 2: "Two", 3: "Three"}, copy=False
      )
      assert nodes_equal(G.nodes(), ["One", "Three", "Two"])
      G = nx.MultiDiGraph([(1, 1), (1, 2), (2, 3)])
      G = nx.relabel_nodes(
          G, {1: "One", 2: "Two", 3: "Three"}, copy=False
      )
      assert nodes_equal(G.nodes(), ["One", "Three", "Two"])
      G = nx.MultiDiGraph([(1, 1)])
      G = nx.relabel_nodes(G, {1: 0}, copy=False)
      assert nodes_equal(G.nodes(), [0])
  
imports: import pytest
  import networkx
  from networkx.generators.classic import empty_graph
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 17 for calling the TestRelabel obj's underlying member method code with example usage: obj.test_relabel_selfloop() without return types