code: def create_csv_files():
      with open(CSV_FILENAME1, "w+") as test_file:
          for line in ["a,b", "john,1", "paul,2"]:
              test_file.write(f"{line}\n")
  
      with open(CSV_FILENAME2, "w+") as test_file:
          for line in ["b,c,d", "john,1,x", "paul,2,"]:
              test_file.write(f"{line}\n")
      yield
      os.remove(CSV_FILENAME1)
      os.remove(CSV_FILENAME2)
  
imports: import json
  import logging
  import os
  import shutil
  from typing import Optional, Union
  from unittest import mock
  import pandas
  import pytest
  import superset.utils.database
  from superset.sql_parse import Table
  from tests.integration_tests.conftest import ADMIN_SCHEMA_NAME
  from superset import db
  from superset import security_manager
  from superset.models.core import Database
  from superset.utils import core
  from tests.integration_tests.test_app import app, login
  from tests.integration_tests.base_tests import get_resp, SupersetTestCase
label_desc: Use image node_id 4 for calling a global function with example usage: create_csv_files() without return types