code: def test_p3_load(self):
      G = self.P3
      c = nx.load_centrality(G)
      d = {0: 0.000, 1: 1.000, 2: 0.000}
      for n in sorted(G):
          assert c[n] == pytest.approx(d[n], abs=1e-3)
      c = nx.load_centrality(G, v=1)
      assert c == pytest.approx(1.0, abs=1e-7)
      c = nx.load_centrality(G, v=1, normalized=True)
      assert c == pytest.approx(1.0, abs=1e-7)
  
imports: import pytest
  import networkx
label_desc: Use image node_id 6 for calling the TestLoadCentrality obj's underlying member method code with example usage: obj.test_p3_load() without return types