code: def test_unicode_attributes(self, tmp_path):
      G = nx.Graph()
      name1 = chr(2344) + chr(123) + chr(6543)
      name2 = chr(5543) + chr(1543) + chr(324)
      node_type = str
      G.add_edge(name1, "Radiohead", foo=name2)
      fname = tmp_path / "test.graphml"
      self.writer(G, fname)
      H = nx.read_graphml(fname, node_type=node_type)
      assert G._adj == H._adj
  
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 19 for calling the TestWriteGraphML obj's underlying member method code with example usage: obj.test_unicode_attributes(tmp_path) without return types