code: def test_zero_nstart(self):
      G = nx.Graph([(1, 2), (1, 3), (2, 3)])
      with pytest.raises(
          nx.NetworkXException,
          match="initial vector cannot have all zero values",
      ):
          nx.eigenvector_centrality(G, nstart={v: 0 for v in G})
  
imports: import math
  import pytest
  import networkx
label_desc: Use image node_id 5 for calling the TestEigenvectorCentralityExceptions obj's underlying member method code with example usage: obj.test_zero_nstart() without return types