code: def test_subgraph_mono(self):
      g1 = nx.Graph()
      g2 = nx.Graph()
      g1.add_edges_from(self.g1edges)
      g2.add_edges_from([[1, 2], [2, 3], [3, 4]])
      gm = iso.GraphMatcher(g1, g2)
      assert gm.subgraph_is_monomorphic()
  
imports: import importlib.resources
  import os
  import random
  import struct
  import networkx
  from networkx.algorithms import isomorphism
label_desc: Use image node_id 3 for calling the TestWikipediaExample obj's underlying member method code with example usage: obj.test_subgraph_mono() without return types