Update mushroom.py

mushroom.py

@@ -312,7 +312,7 @@ class Mushroom(datasets.GeneratorBasedBuilder):
 
     def preprocess(self, data: pandas.DataFrame, config: str = DEFAULT_CONFIG) -> pandas.DataFrame:     
         # data.drop("stalk_root", axis="columns", inplace=True)
-        data = data[list(features_types_per_config[config].keys())]
+        data = data[features_types_per_config[config].keys()]
 
         for feature in _ENCODING_DICS:
             encoding_function = partial(self.encode, feature)