code: def test_getitem(self):
      G = self.K3
      assert G[0] == {1: {0: {}}, 2: {0: {}}}
      with pytest.raises(KeyError):
          G.__getitem__("j")
      with pytest.raises(TypeError):
          G.__getitem__(["A"])
  
imports: from collections import UserDict
  import pytest
  import networkx
  from networkx.utils import edges_equal
  from .test_graph import BaseAttrGraphTester
  from .test_graph import TestGraph
label_desc: Use image node_id 7 for calling the TestMultiGraph obj's underlying member method code with example usage: obj.test_getitem() without return types