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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: nova
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1236648

Title:
  __metaclass__ is incompatible for python 3

Status in OpenStack Telemetry (Ceilometer):
  Fix Committed
Status in Cinder:
  Fix Released
Status in OpenStack Neutron (virtual network service):
  Fix Committed
Status in OpenStack Compute (Nova):
  Fix Released
Status in Oslo - a Library of Common OpenStack Code:
  Fix Committed
Status in Python client library for Keystone:
  Fix Committed
Status in Python client library for Nova:
  Fix Committed

Bug description:
  Some class uses __metaclass__ for abc.ABCMeta.
  six be used in general for python 3 compatibility.

  For example

  import abc
  import six

  
  six.add_metaclass(abc.ABCMeta)
  class FooDriver:

      @abc.abstractmethod
      def bar():
          pass

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