code: def test_read_hdf_multiply_open():
      """Test that we can read from a file that's already opened elsewhere in
      read-only mode."""
      pytest.importorskip("tables")
      df = pd.DataFrame(
          {"x": ["a", "b", "c", "d"], "y": [1, 2, 3, 4]},
          index=[1.0, 2.0, 3.0, 4.0],
      )
      with tmpfile("h5") as fn:
          df.to_hdf(fn, key="/data", format="table")
          with pd.HDFStore(fn, mode="r"):
              dd.read_hdf(fn, "/data", chunksize=2, mode="r")
  
imports: from __future__ import annotations
  import os
  import pathlib
  from time import sleep
  import numpy
  import pandas
  import pytest
  from packaging.version import Version
  import dask
  import dask.dataframe
  from dask._compatibility import PY_VERSION
  from dask.dataframe._compat import tm
  from dask.dataframe.optimize import optimize_dataframe_getitem
  from dask.dataframe.utils import assert_eq
  from dask.layers import DataFrameIOLayer
  from dask.utils import dependency_depth, tmpdir, tmpfile
label_desc: Use image node_id 13 for calling a global function with example usage: test_read_hdf_multiply_open() without return types