code: def test_custom_kernel(self):
      output = example_test.run_example(
          "kmeans/kmeans.py",
          "-m",
          "1",
          "--num",
          "10",
          "--use-custom-kernel",
      )
      assert re.search(
          r" CPU :  [0-9\.]+ sec\s+GPU :  [0-9\.]+ sec",
          output.decode("utf-8"),
      )
  
file_path: cupy/tests/example_tests/test_kmeans.py
imports: import os
  import re
  import shutil
  import tempfile
  import unittest
  from cupy import testing
  from example_tests import example_test
label_desc: Use image node_id 2 for calling the TestKmeans obj's underlying member method code with example usage: obj.test_custom_kernel() without return types