code: def test_maxiter(self):
      with pytest.raises(nx.PowerIterationFailedConvergence):
          nx.katz_centrality(nx.path_graph(3), 0.1, max_iter=0)
  
imports: import math
  import pytest
  import networkx
label_desc: Use image node_id 3 for calling the TestKatzCentrality obj's underlying member method code with example usage: obj.test_maxiter() without return types