code: def test_is_notebook_instance(mock_is_file, py_spark_processor):
      mock_is_file.return_value = True
  
      assert py_spark_processor._is_notebook_instance()
  
imports: from __future__ import absolute_import
  import pathlib
  import subprocess
  import tempfile
  from io import BytesIO
  from typing import Generator
  from unittest.case import TestCase
  from unittest.mock import MagicMock, Mock, call, mock_open, patch
  import pytest
  from sagemaker.processing import ProcessingInput, ProcessingOutput
  from sagemaker.session_settings import SessionSettings
  from sagemaker.spark.processing import PySparkProcessor, SparkJarProcessor, _SparkProcessorBase, _HistoryServer, FileType, SparkConfigUtils
label_desc: Use image node_id 20 for calling a global function with example usage: test_is_notebook_instance(mock_is_file, py_spark_processor) without return types