code: def test_k_factor_trivial(self):
      g = gen.cycle_graph(4)
      f = reg.k_factor(g, 2)
      assert g.edges == f.edges
  
imports: import pytest
  import networkx
  import networkx
  import networkx.algorithms.regular
  import networkx.generators
label_desc: Use image node_id 1 for calling the TestKFactor obj's underlying member method code with example usage: obj.test_k_factor_trivial() without return types