Python 3: generalize the usage of the six module

* Replace itertools.ifilter() with six.moves.filter()
* Replace itertools.imap() with six.moves.map()
* Replace map(_compare, statistics)
  with [_compare(statistic) for statistic in statistics]
* Replace obj.iterkeys() with six.iterkeys(obj)
* Replace obj.iteritems() with six.iteritems(obj)
* Replace xrange() with six.moves.xrange(), or with range() for small
  ranges
* Replace the repr module with six.moves.reprlib

Change-Id: Iaaa328cc15355182bde444a1aeaa4385691c8f90

1 files changed, 2 insertions, 1 deletions

diff --git a/ceilometer/agent/base.py b/ceilometer/agent/base.py
index 631c82f1..7c59657b 100644
--- a/ceilometer/agent/base.py
+++ b/ceilometer/agent/base.py
@@ -26,6 +26,7 @@ import random
 from oslo_config import cfg
 from oslo_context import context
 import six
+from six import moves
 from six.moves.urllib import parse as urlparse
 from stevedore import extension
 
@@ -214,7 +215,7 @@ class AgentManager(os_service.Service):
         extensions = (self._extensions('poll', namespace).extensions
                       for namespace in namespaces)
         if pollster_list:
-            extensions = (itertools.ifilter(_match, exts)
+            extensions = (moves.filter(_match, exts)
                           for exts in extensions)
 
         self.extensions = list(itertools.chain(*list(extensions)))