docstr: Edge betweenness centrality: K5
docstr_tok: ["Edge","betweenness","centrality",":","K5"]
code: def test_normalized_K5(self):
      """Edge betweenness centrality: K5"""
      G = nx.complete_graph(5)
      b = nx.edge_betweenness_centrality(
          G, weight=None, normalized=True
      )
      b_answer = dict.fromkeys(G.edges(), 1 / 10)
      for n in sorted(G.edges()):
          assert b[n] == pytest.approx(b_answer[n], abs=1e-7)
  
imports: import pytest
  import networkx
label_desc: Use image node_id 2 for calling the TestEdgeBetweennessCentrality obj's underlying member method code with example usage: obj.test_normalized_K5() without return types