code: def test_has_eulerian_path_non_cyclic(self):
      # Test graphs with Eulerian paths but no cycles return True.
      assert nx.has_eulerian_path(nx.path_graph(4))
      G = nx.path_graph(6, create_using=nx.DiGraph)
      assert nx.has_eulerian_path(G)
  
imports: import collections
  import pytest
  import networkx
label_desc: Use image node_id 2 for calling the TestHasEulerianPath obj's underlying member method code with example usage: obj.test_has_eulerian_path_non_cyclic() without return types