code: def test_dataframe_null_index_repr(df, pandas_special_case):
      pdf = df
      gdf = cudf.from_pandas(pdf)
  
      expected_repr = (
          repr(pdf).replace("NaN", "<NA>").replace("None", "<NA>")
      )
      actual_repr = repr(gdf)
  
      if pandas_special_case:
          # Pandas inconsistently print StringIndex null values
          # as `None` at some places and `NaN` at few other places
          # Whereas cudf is consistent with strings `null` values
          # to be printed as `None` everywhere.
          actual_repr = repr(gdf).replace("None", "<NA>")
  
      assert expected_repr.split() == actual_repr.split()
  
imports: import textwrap
  import cupy
  import numpy
  import pandas
  import pytest
  from hypothesis import given, settings, strategies
  import cudf
  from cudf.testing import _utils
  from cudf.utils.dtypes import np_dtypes_to_pandas_dtypes
label_desc: Use image node_id 18 for calling a global function with example usage: test_dataframe_null_index_repr(df, pandas_special_case) without return types