diff --git a/tools/tfimage.py b/tools/tfimage.py
index cbc736fc10132756d507bd8a2d84b9d62651071b..3ca1a5e803c7dd6ecb59dc93cc66982624469a22 100644
--- a/tools/tfimage.py
+++ b/tools/tfimage.py
@@ -11,7 +11,7 @@ def create_op(func, **placeholders):
 
     def f(**kwargs):
         feed_dict = {}
-        for argname, argvalue in kwargs.iteritems():
+        for argname, argvalue in kwargs.items():
             placeholder = placeholders[argname]
             feed_dict[placeholder] = argvalue
         return tf.get_default_session().run(op, feed_dict=feed_dict)