code: def test_strings(tmpdir):
      fn = str(tmpdir)
      dfp = pd.DataFrame(
          {"a": ["aa", "bbb", "cccc"], "b": ["hello", "dog", "man"]}
      )
      dfp.set_index("a", inplace=True, drop=True)
      ddf2 = dd.from_pandas(dfp, npartitions=2)
      ddf2.to_parquet(fn, engine="pyarrow")
      read_df = dask_cudf.read_parquet(fn, index=["a"])
      dd.assert_eq(ddf2, read_df.compute().to_pandas())
  
imports: import glob
  import math
  import os
  import numpy
  import pandas
  import pytest
  import dask
  from dask import dataframe
  from dask.utils import natural_sort_key
  import cudf
  import dask_cudf
label_desc: Use image node_id 8 for calling a global function with example usage: test_strings(tmpdir) without return types