code: def test_read_undirected_multigraph_no_multiedge_graphml(self):
      G = self.undirected_multigraph_no_multiedge
      H = nx.read_graphml(self.undirected_multigraph_no_multiedge_fh)
      assert nodes_equal(G.nodes(), H.nodes())
      assert edges_equal(G.edges(), H.edges())
      self.undirected_multigraph_no_multiedge_fh.seek(0)
  
      PG = nx.parse_graphml(
          self.undirected_multigraph_no_multiedge_data
      )
      assert nodes_equal(G.nodes(), PG.nodes())
      assert edges_equal(G.edges(), PG.edges())
  
imports: import io
  import pytest
  import networkx
  from networkx.readwrite.graphml import GraphMLWriter
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 4 for calling the TestReadGraphML obj's underlying member method code with example usage: obj.test_read_undirected_multigraph_no_multiedge_graphml() without return types