code: def preprocessing_files_before_and_after_tests(request):
      paths = [
          "test_save_load_atomized_pipeline_correctly",
          "test_save_load_fitted_atomized_pipeline_correctly_loaded",
          "test_save_load_fitted_atomized_pipeline_correctly",
      ]
  
      delete_files = create_func_delete_files(paths)
  
      delete_files()
      request.addfinalizer(delete_files)
  
imports: import json
  import os
  from functools import reduce
  import numpy
  import pytest
  from sklearn.metrics import mean_squared_error
  from fedot.core.composer.metrics import RMSE
  from fedot.core.data.data import InputData
  from fedot.core.operations.atomized_model import AtomizedModel
  from fedot.core.pipelines.node import PipelineNode
  from fedot.core.pipelines.pipeline import Pipeline
  from fedot.core.utils import fedot_project_root
  from test.integration.utilities.test_pipeline_import_export import create_correct_path, create_func_delete_files
label_desc: Use image node_id 1 for calling a global function with example usage: preprocessing_files_before_and_after_tests(request) without return types