code: def test_on_eulerian_multigraph(self):
      G = nx.MultiGraph(nx.cycle_graph(3))
      G.add_edge(0, 1)
      H = nx.eulerize(G)
      assert nx.is_eulerian(H)
  
imports: import collections
  import pytest
  import networkx
label_desc: Use image node_id 6 for calling the TestEulerize obj's underlying member method code with example usage: obj.test_on_eulerian_multigraph() without return types