diff --git a/qlib/config.py b/qlib/config.py
index c213df9c4..16df27b95 100644
--- a/qlib/config.py
+++ b/qlib/config.py
@@ -29,7 +29,7 @@ class Config:
     def __getattr__(self, attr):
         if attr in self.__dict__["_config"]:
             return self.__dict__["_config"][attr]
-        
+
         raise AttributeError(f"No such {attr} in self._config")
 
     def __setitem__(self, key, value):