Update mushroom.py

mushroom.py

@@ -311,6 +311,7 @@ class Mushroom(datasets.GeneratorBasedBuilder):
 
     def preprocess(self, data: pandas.DataFrame, config: str = DEFAULT_CONFIG) -> pandas.DataFrame:     
         data.columns = _ORIGINAL_FEATURE_NAMES
+        print(data.columns)
         data.drop("stalk_root", axis="columns", inplace=True)
         data = data[features_types_per_config[config].keys()]