code: def test_no_nodes(self):
      with pytest.raises(nx.NetworkXError):
          G = nx.Graph()
          node_classification.local_and_global_consistency(G)
  
file_path: networkx/networkx/algorithms/tests/test_node_classification.py
imports: import pytest
  import networkx
  from networkx.algorithms import node_classification
label_desc: Use image node_id 3 for calling the TestLocalAndGlobalConsistency obj's underlying member method code with example usage: obj.test_no_nodes() without return types