code: def test_csv_read_many_files_diff_dirs(
      ray_start_regular_shared,
      fs,
      data_path,
      endpoint_url,
  ):
      if endpoint_url is None:
          storage_options = {}
      else:
          storage_options = dict(
              client_kwargs=dict(endpoint_url=endpoint_url)
          )
  
      dir1 = os.path.join(data_path, "dir1")
      dir2 = os.path.join(data_path, "dir2")
      if fs is None:
          os.mkdir(dir1)
          os.mkdir(dir2)
      else:
          fs.create_dir(_unwrap_protocol(dir1))
          fs.create_dir(_unwrap_protocol(dir2))
  
      paths = []
      dfs = []
      num_dfs = 2 * FILE_SIZE_FETCH_PARALLELIZATION_THRESHOLD
      for i, dir_path in enumerate([dir1, dir2]):
          for j in range(num_dfs * i, num_dfs * (i + 1)):
              df = pd.DataFrame(
                  {"one": list(range(3 * j, 3 * (j + 1)))}
              )
              dfs.append(df)
              path = os.path.join(dir_path, f"test_{j}.csv")
              paths.append(path)
              df.to_csv(
                  path, index=False, storage_options=storage_options
              )
      ds = ray.data.read_csv(paths, filesystem=fs)
  
      dsdf = ds.to_pandas()
      df = pd.concat(dfs).reset_index(drop=True)
      pd.testing.assert_frame_equal(df, dsdf)
  
imports: import itertools
  import os
  import shutil
  from functools import partial
  import pandas
  import pyarrow
  import pyarrow.parquet
  import pytest
  from packaging.version import Version
  from pytest_lazyfixture import lazy_fixture
  import ray
  from ray.data.block import BlockAccessor
  from ray.data.datasource import BaseFileMetadataProvider, FastFileMetadataProvider, PartitionStyle, PathPartitionFilter
  from ray.data.datasource.file_based_datasource import FILE_SIZE_FETCH_PARALLELIZATION_THRESHOLD
  from ray.data.datasource.path_util import _unwrap_protocol
  from ray.data.tests.conftest import *
  from ray.data.tests.mock_http_server import *
  from ray.data.tests.test_partitioning import PathPartitionEncoder
  from ray.data.tests.util import Counter
  from ray.tests.conftest import *
label_desc: Use image node_id 8 for calling a global function with example usage: test_csv_read_many_files_diff_dirs(ray_start_regular_shared, fs, data_path, endpoint_url) without return types