code: def test_number_attacting_components(self):
      assert nx.number_attracting_components(self.G1) == 3
      assert nx.number_attracting_components(self.G2) == 1
      assert nx.number_attracting_components(self.G3) == 2
      assert nx.number_attracting_components(self.G4) == 0
  
file_path: networkx/networkx/algorithms/components/tests/test_attracting.py
imports: import pytest
  import networkx
  from networkx import NetworkXNotImplemented
label_desc: Use image node_id 3 for calling the TestAttractingComponents obj's underlying member method code with example usage: obj.test_number_attacting_components() without return types