from six.moves import xrange for Python 3

xrange() is called on lines 137 and 359.

Author: cclauss

tensor2tensor/layers/rev_block.py

@@ -28,6 +28,7 @@
 
 # Dependency imports
 
+from six.moves import xrange
 import tensorflow as tf
 from tensorflow.python.framework import dtypes
 from tensorflow.python.framework import function