diff --git a/qlib/contrib/data/handler.py b/qlib/contrib/data/handler.py
index 01d83dd6a..4c9bf1b4a 100644
--- a/qlib/contrib/data/handler.py
+++ b/qlib/contrib/data/handler.py
@@ -147,7 +147,7 @@ class Alpha158(DataHandlerLP):
             },
             "rolling": {},
         }
-        return Alpha158DL.parse_config_to_fields(conf)
+        return Alpha158DL.parse_config_to_fields(conf)  # pylint: disable=E1101
 
     def get_label_config(self):
         return ["Ref($close, -2)/Ref($close, -1) - 1"], ["LABEL0"]
diff --git a/qlib/contrib/data/loader.py b/qlib/contrib/data/loader.py
index 432caedf1..4d11f3a34 100644
--- a/qlib/contrib/data/loader.py
+++ b/qlib/contrib/data/loader.py
@@ -1,4 +1,4 @@
-from qlib.data.dataset.loader import DataLoader, QlibDataLoader
+from qlib.data.dataset.loader import QlibDataLoader
 
 
 class Alpha360DL(QlibDataLoader):