old_contents: # Copyright 2010 United States Government as represented by the
  # Administrator of the National Aeronautics and Space Administration.
  # All Rights Reserved.
  #
  #    Licensed under the Apache License, Version 2.0 (the "License"); you may
  #    not use this file except in compliance with the License. You may obtain
  #    a copy of the License at
  #
  #         http://www.apache.org/licenses/LICENSE-2.0
  #
  #    Unless required by applicable law or agreed to in writing, software
  #    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  #    License for the specific language governing permissions and limitations
  #    under the License.
  
  """Base class for classes that need modular database access."""
  
  from oslo.config import cfg
  
  from nova.openstack.common import importutils
  
  db_driver_opt = cfg.StrOpt('db_driver',
                             default='nova.db',
                             help='The driver to use for database access')
  
  CONF = cfg.CONF
  CONF.register_opt(db_driver_opt)
  
  
  class Base(object):
      """DB driver is injected in the init method."""
  
      def __init__(self, db_driver=None):
          if not db_driver:
              db_driver = CONF.db_driver
          self.db = importutils.import_module(db_driver)  # pylint: disable=C0103
  
new_contents: # Copyright 2010 United States Government as represented by the
  # Administrator of the National Aeronautics and Space Administration.
  # All Rights Reserved.
  #
  #    Licensed under the Apache License, Version 2.0 (the "License"); you may
  #    not use this file except in compliance with the License. You may obtain
  #    a copy of the License at
  #
  #         http://www.apache.org/licenses/LICENSE-2.0
  #
  #    Unless required by applicable law or agreed to in writing, software
  #    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  #    License for the specific language governing permissions and limitations
  #    under the License.
  
  """Base class for classes that need modular database access."""
  
  from oslo.config import cfg
  
  from nova.openstack.common import importutils
  
  db_driver_opt = cfg.StrOpt('db_driver',
                             default='nova.db',
                             help='The driver to use for database access')
  
  CONF = cfg.CONF
  CONF.register_opt(db_driver_opt)
  
  
  class Base(object):
      """DB driver is injected in the init method."""
  
      def __init__(self, db_driver=None):
          super(Base, self).__init__()
          if not db_driver:
              db_driver = CONF.db_driver
          self.db = importutils.import_module(db_driver)  # pylint: disable=C0103
  
subject: Add super call to db Base class