code: def test_exceptions(self, tmp_path):
      pytest.raises(ValueError, literal_destringizer, "(")
      pytest.raises(
          ValueError, literal_destringizer, "frozenset([1, 2, 3])"
      )
      pytest.raises(
          ValueError, literal_destringizer, literal_destringizer
      )
      pytest.raises(
          ValueError, literal_stringizer, frozenset([1, 2, 3])
      )
      pytest.raises(ValueError, literal_stringizer, literal_stringizer)
      with open(tmp_path / "test.gml", "w+b") as f:
          f.write(codecs.BOM_UTF8 + b"graph[]")
          f.seek(0)
          pytest.raises(nx.NetworkXError, nx.read_gml, f)
  
      def assert_parse_error(gml):
          pytest.raises(nx.NetworkXError, nx.parse_gml, gml)
  
      assert_parse_error(["graph [\n\n", "]"])
      assert_parse_error("")
      assert_parse_error('Creator ""')
      assert_parse_error("0")
      assert_parse_error("graph ]")
      assert_parse_error("graph [ 1 ]")
      assert_parse_error("graph [ 1.E+2 ]")
      assert_parse_error('graph [ "A" ]')
      assert_parse_error("graph [ ] graph ]")
      assert_parse_error("graph [ ] graph [ ]")
      assert_parse_error("graph [ data [1, 2, 3] ]")
      assert_parse_error("graph [ node [ ] ]")
      assert_parse_error("graph [ node [ id 0 ] ]")
      nx.parse_gml('graph [ node [ id "a" ] ]', label="id")
      assert_parse_error(
          "graph [ node [ id 0 label 0 ] node [ id 0 label 1 ] ]"
      )
      assert_parse_error(
          "graph [ node [ id 0 label 0 ] node [ id 1 label 0 ] ]"
      )
      assert_parse_error("graph [ node [ id 0 label 0 ] edge [ ] ]")
      assert_parse_error(
          "graph [ node [ id 0 label 0 ] edge [ source 0 ] ]"
      )
      nx.parse_gml(
          "graph [edge [ source 0 target 0 ] node [ id 0 label 0 ] ]"
      )
      assert_parse_error(
          "graph [ node [ id 0 label 0 ] edge [ source 1 target 0 ] ]"
      )
      assert_parse_error(
          "graph [ node [ id 0 label 0 ] edge [ source 0 target 1 ] ]"
      )
      assert_parse_error(
          "graph [ node [ id 0 label 0 ] node [ id 1 label 1 ] "
          "edge [ source 0 target 1 ] edge [ source 1 target 0 ] ]"
      )
      nx.parse_gml(
          "graph [ node [ id 0 label 0 ] node [ id 1 label 1 ] "
          "edge [ source 0 target 1 ] edge [ source 1 target 0 ] "
          "directed 1 ]"
      )
      nx.parse_gml(
          "graph [ node [ id 0 label 0 ] node [ id 1 label 1 ] "
          "edge [ source 0 target 1 ] edge [ source 0 target 1 ]"
          "multigraph 1 ]"
      )
      nx.parse_gml(
          "graph [ node [ id 0 label 0 ] node [ id 1 label 1 ] "
          "edge [ source 0 target 1 key 0 ] edge [ source 0 target 1 ]"
          "multigraph 1 ]"
      )
      assert_parse_error(
          "graph [ node [ id 0 label 0 ] node [ id 1 label 1 ] "
          "edge [ source 0 target 1 key 0 ] edge [ source 0 target 1 key 0 ]"
          "multigraph 1 ]"
      )
      nx.parse_gml(
          "graph [ node [ id 0 label 0 ] node [ id 1 label 1 ] "
          "edge [ source 0 target 1 key 0 ] edge [ source 1 target 0 key 0 ]"
          "directed 1 multigraph 1 ]"
      )
  
      # Tests for string convertible alphanumeric id and label values
      nx.parse_gml(
          "graph [edge [ source a target a ] node [ id a label b ] ]"
      )
      nx.parse_gml(
          "graph [ node [ id n42 label 0 ] node [ id x43 label 1 ]"
          "edge [ source n42 target x43 key 0 ]"
          "edge [ source x43 target n42 key 0 ]"
          "directed 1 multigraph 1 ]"
      )
      assert_parse_error(
          "graph [edge [ source '\u4200' target '\u4200' ] "
          + "node [ id '\u4200' label b ] ]"
      )
  
      def assert_generate_error(*args, **kwargs):
          pytest.raises(
              nx.NetworkXError,
              lambda: list(nx.generate_gml(*args, **kwargs)),
          )
  
      G = nx.Graph()
      G.graph[3] = 3
      assert_generate_error(G)
      G = nx.Graph()
      G.graph["3"] = 3
      assert_generate_error(G)
      G = nx.Graph()
      G.graph["data"] = frozenset([1, 2, 3])
      assert_generate_error(G, stringizer=literal_stringizer)
  
imports: import codecs
  import io
  import math
  from ast import literal_eval
  from contextlib import contextmanager
  from textwrap import dedent
  import pytest
  import networkx
  from networkx.readwrite.gml import literal_destringizer, literal_stringizer
label_desc: Use image node_id 16 for calling the TestGraph obj's underlying member method code with example usage: obj.test_exceptions(tmp_path) without return types