old_contents: # Copyright 2012 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.
  
  import logging
  
  from cliff.lister import Lister
  
  from service_registry_cli.utils import BaseListCommand, get_client
  
  
  class ListCommand(BaseListCommand, Lister):
      """
      Return a list of the configuration values.
      """
      log = logging.getLogger(__name__)
  
      def take_action(self, parsed_args):
          client = get_client(parsed_args)
          marker = parsed_args.marker if parsed_args.marker else None
          limit = parsed_args.limit if parsed_args.limit else None
  
          result = client.configuration.list(marker=marker, limit=limit)
  
          values = result['values']
          metadata = result['metadata']
  
          parsed_args.returned_metadata = metadata
  
          result = [(value['id'], value['value'])
                    for value in values]
          return (('ID', 'Value'), result)
  
new_contents: # Copyright 2012 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.
  
  import logging
  
  from cliff.lister import Lister
  
  from service_registry_cli.utils import BaseListCommand, get_client
  
  
  class ListCommand(BaseListCommand, Lister):
      """
      Return a list of the configuration values.
      """
      log = logging.getLogger(__name__)
  
      def get_parser(self, prog_name):
          parser = super(ListCommand, self).get_parser(prog_name=prog_name)
          parser.add_argument('--namespace', dest='namespace')
          return parser
  
      def take_action(self, parsed_args):
          client = get_client(parsed_args)
  
          marker = parsed_args.marker if parsed_args.marker else None
          limit = parsed_args.limit if parsed_args.limit else None
  
          kwargs = {'marker': marker, 'limit': limit}
  
          if parsed_args.namespace:
              result = client.configuration.list_for_namespace(**kwargs)
          else:
              result = client.configuration.list(**kwargs)
  
          values = result['values']
          metadata = result['metadata']
  
          parsed_args.returned_metadata = metadata
  
          result = [(value['id'], value['value'])
                    for value in values]
          return (('ID', 'Value'), result)
  
subject: Add --namespace option to configuration list command.