diff --git a/research/lexnet_nc/lexnet_model.py b/research/lexnet_nc/lexnet_model.py
index e2668a28af5..b0f16b030b3 100644
--- a/research/lexnet_nc/lexnet_model.py
+++ b/research/lexnet_nc/lexnet_model.py
@@ -21,6 +21,7 @@
 import lexnet_common
 import numpy as np
 import tensorflow as tf
+from six.moves import xrange
 
 
 class LexNETModel(object):
diff --git a/research/slim/datasets/build_imagenet_data.py b/research/slim/datasets/build_imagenet_data.py
index a36d86abcf8..777722ba42e 100644
--- a/research/slim/datasets/build_imagenet_data.py
+++ b/research/slim/datasets/build_imagenet_data.py
@@ -94,6 +94,8 @@
 
 import numpy as np
 import tensorflow as tf
+from six.moves import xrange
+
 
 tf.app.flags.DEFINE_string('train_directory', '/tmp/',
                            'Training data directory')
diff --git a/research/slim/datasets/preprocess_imagenet_validation_data.py b/research/slim/datasets/preprocess_imagenet_validation_data.py
index 7bd99122170..3fa198024de 100755
--- a/research/slim/datasets/preprocess_imagenet_validation_data.py
+++ b/research/slim/datasets/preprocess_imagenet_validation_data.py
@@ -49,9 +49,10 @@
 from __future__ import print_function
 
 import os
-import os.path
 import sys
 
+from six.moves import xrange
+
 
 if __name__ == '__main__':
   if len(sys.argv) < 3:
diff --git a/research/slim/datasets/process_bounding_boxes.py b/research/slim/datasets/process_bounding_boxes.py
index b0ee6549cc0..1367e9d3335 100755
--- a/research/slim/datasets/process_bounding_boxes.py
+++ b/research/slim/datasets/process_bounding_boxes.py
@@ -85,6 +85,7 @@
 import os.path
 import sys
 import xml.etree.ElementTree as ET
+from six.moves import xrange
 
 
 class BoundingBox(object):
diff --git a/research/slim/nets/cyclegan.py b/research/slim/nets/cyclegan.py
index 445eaea9623..3af798e8760 100644
--- a/research/slim/nets/cyclegan.py
+++ b/research/slim/nets/cyclegan.py
@@ -20,6 +20,7 @@
 import numpy as np
 
 import tensorflow as tf
+from six.moves import xrange
 
 layers = tf.contrib.layers
 
diff --git a/research/slim/nets/dcgan.py b/research/slim/nets/dcgan.py
index 4e445066d63..b485f5c2984 100644
--- a/research/slim/nets/dcgan.py
+++ b/research/slim/nets/dcgan.py
@@ -20,6 +20,7 @@
 from math import log
 
 import tensorflow as tf
+from six.moves import xrange
 slim = tf.contrib.slim
 
 
diff --git a/research/slim/nets/dcgan_test.py b/research/slim/nets/dcgan_test.py
index 124342c6ce6..537199af91a 100644
--- a/research/slim/nets/dcgan_test.py
+++ b/research/slim/nets/dcgan_test.py
@@ -19,6 +19,7 @@
 from __future__ import print_function
 
 import tensorflow as tf
+from six.moves import xrange
 from nets import dcgan
 
 
diff --git a/research/swivel/glove_to_shards.py b/research/swivel/glove_to_shards.py
index 1a24d48adcb..4a9cd23c793 100755
--- a/research/swivel/glove_to_shards.py
+++ b/research/swivel/glove_to_shards.py
@@ -44,6 +44,7 @@
 import sys
 
 import tensorflow as tf
+from six.moves import xrange
 
 flags = tf.app.flags