diff --git a/Caffe/layer_param.py b/Caffe/layer_param.py
index fd966d7..5cbe56c 100755
--- a/Caffe/layer_param.py
+++ b/Caffe/layer_param.py
@@ -26,7 +26,12 @@ def __init__(self,name='',type='',top=(),bottom=()):
         self.param=pb.LayerParameter()
         self.name=self.param.name=name
         self.type=self.param.type=type
-
+        
+        if None in top:
+            top = list(filter(None, top))
+        if None in bottom:
+            bottom = list(filter(None, bottom))
+            
         self.top=self.param.top
         self.top.extend(top)
         self.bottom=self.param.bottom
@@ -180,4 +185,4 @@ def copy_from(self,layer_param):
         pass
 
 def set_enum(param,key,value):
-    setattr(param,key,param.Value(value))
\ No newline at end of file
+    setattr(param,key,param.Value(value))