old_contents: # Copyright 2013 Rackspace
  #
  # Licensed to the Apache Software Foundation (ASF) under one or more
  # contributor license agreements.  See the NOTICE file distributed with
  # this work for additional information regarding copyright ownership.
  # The ASF licenses this file to You 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.
  
  __all__ = [
      'BaseCommand',
      'BaseListCommand'
  ]
  
  from cliff.command import Command
  from cliff.lister import Lister
  
  
  class BaseCommand(Command):
      def get_parser(self, prog_name):
          parser = super(BaseCommand, self).get_parser(prog_name=prog_name)
          parser.add_argument('--username', dest='username')
          parser.add_argument('--api-key', dest='api_key')
          parser.add_argument('--api-url', dest='api_url')
          return parser
  
  
  class BaseListCommand(BaseCommand, Lister):
      def get_parser(self, prog_name):
          parser = super(BaseListCommand, self).get_parser(prog_name=prog_name)
          return parser
  
      @property
      def formatter_default(self):
          return 'paginated_table'
  
new_contents: # Copyright 2013 Rackspace
  #
  # Licensed to the Apache Software Foundation (ASF) under one or more
  # contributor license agreements.  See the NOTICE file distributed with
  # this work for additional information regarding copyright ownership.
  # The ASF licenses this file to You 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.
  
  __all__ = [
      'BaseCommand',
      'BaseShowCommand',
      'BaseListCommand'
  ]
  
  from cliff.command import Command
  from cliff.show import ShowOne
  from cliff.lister import Lister
  
  
  class BaseCommand(Command):
      def get_parser(self, prog_name):
          parser = super(BaseCommand, self).get_parser(prog_name=prog_name)
          parser.add_argument('--username', dest='username')
          parser.add_argument('--api-key', dest='api_key')
          parser.add_argument('--api-url', dest='api_url')
          return parser
  
  
  class BaseShowCommand(BaseCommand, ShowOne):
      def get_parser(self, prog_name):
          parser = super(BaseShowCommand, self).get_parser(prog_name=prog_name)
          parser.add_argument('--id', dest='object_id')
          return parser
  
  
  class BaseListCommand(BaseCommand, Lister):
      def get_parser(self, prog_name):
          parser = super(BaseListCommand, self).get_parser(prog_name=prog_name)
          return parser
  
      @property
      def formatter_default(self):
          return 'paginated_table'
  
subject: Add BaseShowCommand class.