def METHOD_NAME(classifier_pipeline_explainer):
    assert isinstance(classifier_pipeline_explainer.pdp_df("num__age"), pd.DataFrame)
    assert isinstance(classifier_pipeline_explainer.pdp_df("cat__sex"), pd.DataFrame)
    assert isinstance(classifier_pipeline_explainer.pdp_df("num__age", index=0), pd.DataFrame)
    assert isinstance(classifier_pipeline_explainer.pdp_df("cat__sex", index=0), pd.DataFrame)