message: Minor change for Python 3 compatibility for TPU Estimators.
diff: @@ -27,6 +27,7 @@ import time
  import six
  from six.moves import queue as Queue # pylint: disable=redefined-builtin
  +from six.moves import xrange # pylint: disable=redefined-builtin
  from tensorflow.contrib.tpu.python.ops import tpu_ops
  from tensorflow.contrib.tpu.python.tpu import tpu
  