code: def test_is_eulerian(self):
      assert nx.is_eulerian(nx.complete_graph(5))
      assert nx.is_eulerian(nx.complete_graph(7))
      assert nx.is_eulerian(nx.hypercube_graph(4))
      assert nx.is_eulerian(nx.hypercube_graph(6))
  
      assert not nx.is_eulerian(nx.complete_graph(4))
      assert not nx.is_eulerian(nx.complete_graph(6))
      assert not nx.is_eulerian(nx.hypercube_graph(3))
      assert not nx.is_eulerian(nx.hypercube_graph(5))
  
      assert not nx.is_eulerian(nx.petersen_graph())
      assert not nx.is_eulerian(nx.path_graph(4))
  
imports: import collections
  import pytest
  import networkx
label_desc: Use image node_id 1 for calling the TestIsEulerian obj's underlying member method code with example usage: obj.test_is_eulerian() without return types