diff --git a/nova/cmd/manage.py b/nova/cmd/manage.py
index 06e6d8c1eac7..6826da51f0bb 100644
--- a/nova/cmd/manage.py
+++ b/nova/cmd/manage.py
@@ -55,10 +55,10 @@
 
 from __future__ import print_function
 
-import netaddr
 import os
 import sys
 
+import netaddr
 from oslo.config import cfg
 
 from nova.api.ec2 import ec2utils
diff --git a/nova/ipv6/account_identifier.py b/nova/ipv6/account_identifier.py
index cbf0eabfd107..4cc618b6a192 100644
--- a/nova/ipv6/account_identifier.py
+++ b/nova/ipv6/account_identifier.py
@@ -20,6 +20,7 @@
 """IPv6 address generation with account identifier embedded."""
 
 import hashlib
+
 import netaddr
 
 from nova.openstack.common.gettextutils import _
diff --git a/nova/network/linux_net.py b/nova/network/linux_net.py
index 635d1ae678f2..6c64a27038f2 100644
--- a/nova/network/linux_net.py
+++ b/nova/network/linux_net.py
@@ -21,10 +21,10 @@
 
 import calendar
 import inspect
-import netaddr
 import os
 import re
 
+import netaddr
 from oslo.config import cfg
 
 from nova import db
diff --git a/nova/objects/utils.py b/nova/objects/utils.py
index 674576353eef..bc5bc452c2ad 100644
--- a/nova/objects/utils.py
+++ b/nova/objects/utils.py
@@ -16,6 +16,7 @@
 
 import datetime
 import iso8601
+
 import netaddr
 
 from nova.network import model as network_model
diff --git a/nova/tests/api/openstack/compute/contrib/test_networks.py b/nova/tests/api/openstack/compute/contrib/test_networks.py
index 8fbdf82735e0..1c2548456414 100644
--- a/nova/tests/api/openstack/compute/contrib/test_networks.py
+++ b/nova/tests/api/openstack/compute/contrib/test_networks.py
@@ -16,9 +16,9 @@
 
 import copy
 import math
-import netaddr
 import uuid
 
+import netaddr
 from oslo.config import cfg
 import webob
 
diff --git a/nova/tests/objects/test_objects.py b/nova/tests/objects/test_objects.py
index 97d07e835ebb..9f8a36362728 100644
--- a/nova/tests/objects/test_objects.py
+++ b/nova/tests/objects/test_objects.py
@@ -15,6 +15,7 @@
 import contextlib
 import datetime
 import iso8601
+
 import netaddr
 
 from nova.conductor import rpcapi as conductor_rpcapi
diff --git a/nova/tests/virt/test_virt_drivers.py b/nova/tests/virt/test_virt_drivers.py
index 88d04c4f7c81..674423b36ab7 100644
--- a/nova/tests/virt/test_virt_drivers.py
+++ b/nova/tests/virt/test_virt_drivers.py
@@ -16,10 +16,11 @@
 
 import base64
 import fixtures
-import netaddr
 import sys
 import traceback
 
+import netaddr
+
 from nova.compute import manager
 from nova import exception
 from nova.openstack.common import importutils
diff --git a/nova/virt/netutils.py b/nova/virt/netutils.py
index fe0f3d46d43d..caf67e3ba722 100644
--- a/nova/virt/netutils.py
+++ b/nova/virt/netutils.py
@@ -25,7 +25,6 @@ import os
 
 import jinja2
 import netaddr
-
 from oslo.config import cfg
 
 from nova.network import model