code: def test_dispatch_print_registrations_for_dispatch_key_invalid(self):
      with self.assertRaisesRegex(
          RuntimeError, "could not parse dispatch key: invalid_key"
      ):
          C._dispatch_print_registrations_for_dispatch_key(
              "invalid_key"
          )
  
imports: import torch._C
  from torch.testing._internal.common_utils import TestCase, run_tests
  from torch._python_dispatcher import PythonDispatcher
  from collections import namedtuple
  import itertools
  import os
  import re
  import torch.utils.cpp_extension
label_desc: Use image node_id 27 for calling the TestDispatch obj's underlying member method code with example usage: obj.test_dispatch_print_registrations_for_dispatch_key_invalid() without return types