diff --git a/python/paddle/fluid/__init__.py b/python/paddle/fluid/__init__.py
index fd788d09296c071168cfe39ec821d4bb20c894db..ecf75f72822ae56dbbadc16e2c521727affc34dd 100644
--- a/python/paddle/fluid/__init__.py
+++ b/python/paddle/fluid/__init__.py
@@ -104,7 +104,8 @@ def __bootstrap__():
     import platform
 
     if os.name == 'nt':
-        third_lib_path = os.path.abspath(os.path.dirname(__file__)) + os.sep + '..' + os.sep + 'libs'
+        third_lib_path = os.path.abspath(os.path.dirname(
+            __file__)) + os.sep + '..' + os.sep + 'libs'
         os.environ['path'] += ';' + third_lib_path
         sys.path.append(third_lib_path)