code: def test_rolling_getitem_window():
      index = pd.DatetimeIndex(
          pd.date_range("2000-01-01", "2000-01-02", freq="1h")
      )
      pdf = pd.DataFrame({"x": np.arange(len(index))}, index=index)
      gdf = cudf.from_pandas(pdf)
  
      assert_eq(
          pdf.rolling("2h").x.mean(),
          gdf.rolling("2h").x.mean(),
          check_freq=False,
      )
  
imports: import math
  from contextlib import contextmanager
  import numpy
  import pandas
  import pytest
  import cudf
  from cudf.core._compat import PANDAS_GE_150
  from cudf.testing._utils import _create_pandas_series_float64_default, assert_eq
  from cudf.testing.dataset_generator import rand_dataframe
label_desc: Use image node_id 10 for calling a global function with example usage: test_rolling_getitem_window() without return types