code: def test_incomparable_ties(self):
      d = {5: 0, 4: 0, "a": 0, 2: 0, 1: 0}
      pytest.raises(TypeError, MappedQueue, d)
  
imports: import pytest
  from networkx.utils.mapped_queue import MappedQueue, _HeapElement
label_desc: Use image node_id 6 for calling the TestMappedDict obj's underlying member method code with example usage: obj.test_incomparable_ties() without return types