fix imports for attacks_tfe.py
from abc import ABCMeta
-import numpy as np
-from six.moves import xrange
+from distutils.version import LooseVersion
import warnings
import collections
+
+import numpy as np
+from six.moves import xrange
import tensorflow as tf
import cleverhans.attacks as attacks
@@ -11,7 +13,6 @@ from cleverhans.compat import reduce_max
from cleverhans.compat import reduce_sum
from cleverhans.model import Model
from cleverhans.loss import LossCrossEntropy
-from distutils.version import LooseVersion
_logger = utils.create_logger("cleverhans.attacks_tfe")
