diff --git a/python/paddle/fluid/initializer.py b/python/paddle/fluid/initializer.py
index ad15c32a35e12a01128c2bd21e783fe9ee043b67..4e132ed26183eaa5e572128e679cdbffd42e5a42 100644
--- a/python/paddle/fluid/initializer.py
+++ b/python/paddle/fluid/initializer.py
@@ -18,7 +18,8 @@ import contextlib
 
 __all__ = [
     'Constant', 'Uniform', 'Normal', 'Xavier', 'force_init_on_cpu',
-    'init_on_cpu', 'ConstantInitializer', 'UniformInitializer', 'NormalInitializer', 'XavierInitializer'
+    'init_on_cpu', 'ConstantInitializer', 'UniformInitializer',
+    'NormalInitializer', 'XavierInitializer'
 ]
 
 _force_init_on_cpu_ = False