code: def test_get_dummies_prefix_sep(prefix, prefix_sep):
      data = {
          "first": ["1", "2", "3"],
          "second": ["abc", "def", "ghi"],
          "third": ["ji", "ji", "ji"],
      }
  
      gdf = cudf.DataFrame(data)
      pdf = pd.DataFrame(data)
  
      encoded_expected = pd.get_dummies(
          pdf, prefix=prefix, prefix_sep=prefix_sep
      )
      with pytest.warns(FutureWarning):
          encoded_actual = cudf.get_dummies(
              gdf, prefix=prefix, prefix_sep=prefix_sep
          )
  
      assert_eq(encoded_expected, encoded_actual)
  
file_path: cudf/python/cudf/cudf/tests/test_onehot.py
imports: from string import ascii_lowercase
  import numpy
  import pandas
  import pytest
  import cudf
  from cudf.testing._utils import assert_eq
label_desc: Use image node_id 4 for calling a global function with example usage: test_get_dummies_prefix_sep(prefix, prefix_sep) without return types