docstr: Approximate current-flow betweenness centrality: K4 normalized
docstr_tok: ["Approximate","current-flow","betweenness","centrality",":","K4","normalized"]
code: def test_K4_normalized(self):
      "Approximate current-flow betweenness centrality: K4 normalized"
      G = nx.complete_graph(4)
      b = nx.current_flow_betweenness_centrality(G, normalized=True)
      epsilon = 0.1
      ba = approximate_cfbc(G, normalized=True, epsilon=0.5 * epsilon)
      for n in sorted(G):
          np.testing.assert_allclose(b[n], ba[n], atol=epsilon)
  
imports: import pytest
  import networkx
  from networkx import approximate_current_flow_betweenness_centrality
  from networkx import edge_current_flow_betweenness_centrality
label_desc: Use image node_id 1 for calling the TestApproximateFlowBetweennessCentrality obj's underlying member method code with example usage: obj.test_K4_normalized() without return types