[2/3]Replace six.iteritems() with .items()

1.As mentioned in [1], we should avoid using
six.iteritems to achieve iterators. We can
use dict.items instead, as it will return
iterators in PY3 as well. And dict.items/keys
will more readable. 2.In py2, the performance
about list should be negligible, see the link [2].
[1] https://wiki.openstack.org/wiki/Python3
[2] http://lists.openstack.org/pipermail/openstack-dev/2015-June/066391.html

The patch list:
    1. cells.
    2. compute api.
    3. image.
    4. network.
    5. objects.
    6. scheduler.
    7. virt.
    8. other resources.

Partial-Implements: blueprint replace-iteritems-with-items

Change-Id: Ic6e469eb80ee1774de1374bb36f38b5134b6b311

1 files changed, 2 insertions, 2 deletions

diff --git a/nova/policy.py b/nova/policy.py
index 6f81fddec9..843c426898 100644
--- a/nova/policy.py
+++ b/nova/policy.py
@@ -22,7 +22,7 @@ from oslo_config import cfg
 from oslo_log import log as logging
 from oslo_policy import policy
 from oslo_utils import excutils
-import six
+
 
 from nova import exception
 from nova.i18n import _LE, _LW
@@ -89,7 +89,7 @@ def _serialize_rules(rules):
     rules list.
     """
     result = [(rule_name, str(rule))
-              for rule_name, rule in six.iteritems(rules)]
+              for rule_name, rule in rules.items()]
     return sorted(result, key=lambda rule: rule[0])