diff --git a/ppcls/arch/gears/identity_head.py b/ppcls/arch/gears/identity_head.py
index 8542dd730e517b0d36b601db1f3a16d6adc1dd39..7d11e5742e1645a4a3407c73f1c6d316e0aa4e6d 100644
--- a/ppcls/arch/gears/identity_head.py
+++ b/ppcls/arch/gears/identity_head.py
@@ -1,5 +1,6 @@
 from paddle import nn
 
+
 class IdentityHead(nn.Layer):
     def __init__(self):
         super(IdentityHead, self).__init__()