code: def test_qr(self):
      ex = import_module_any_path(example_path / "qr")
  
      data, result = self.call_main(ex)
      np.testing.assert_allclose(
          data, np.matmul(result.matrixQ, result.matrixR)
      )
  
imports: import importlib
  import inspect
  import os
  import sys
  import time
  import unittest
  from dataclasses import dataclass, field
  from datetime import datetime
  from importlib import import_module
  from pathlib import Path
  from types import ModuleType
  from typing import Any, Callable, List, Optional, Tuple, Union
  import numpy
  import numpy.typing
  from daal4py.sklearn._utils import daal_check_version, get_daal_version
label_desc: Use image node_id 3 for calling the Daal4pyBase obj's underlying member method code with example usage: obj.test_qr() without return types