old_contents: # Copyright (c) 2015 Hewlett-Packard Development Company, L.P.
  #
  # 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.
  
  import argparse
  import json
  import sys
  import yaml
  
  import shade
  import shade.inventory
  
  
  def output_format_dict(data, use_yaml):
      if use_yaml:
          return yaml.safe_dump(data, default_flow_style=False)
      else:
          return json.dumps(data, sort_keys=True, indent=2)
  
  
  def parse_args():
      parser = argparse.ArgumentParser(description='OpenStack Inventory Module')
      parser.add_argument('--refresh', action='store_true',
                          help='Refresh cached information')
      group = parser.add_mutually_exclusive_group(required=True)
      group.add_argument('--list', action='store_true',
                         help='List active servers')
      group.add_argument('--host', help='List details about the specific host')
      parser.add_argument('--private', action='store_true', default=False,
                          help='Use private IPs for interface_ip')
      parser.add_argument('--cloud', default=None,
                          help='Return data for one cloud only')
      parser.add_argument('--yaml', action='store_true', default=False,
                          help='Output data in nicely readable yaml')
      parser.add_argument('--debug', action='store_true', default=False,
                          help='Enable debug output')
      return parser.parse_args()
  
  
  def main():
      args = parse_args()
      try:
          shade.simple_logging(debug=args.debug)
          inventory = shade.inventory.OpenStackInventory(
              refresh=args.refresh, private=args.private,
              cloud=args.cloud)
          if args.list:
              output = inventory.list_hosts()
          elif args.host:
              output = inventory.get_host(args.host)
          print(output_format_dict(output, args.yaml))
      except shade.OpenStackCloudException as e:
          sys.stderr.write(e.message + '\n')
          sys.exit(1)
      sys.exit(0)
  
  
  if __name__ == '__main__':
      main()
  
new_contents: # Copyright (c) 2015 Hewlett-Packard Development Company, L.P.
  #
  # 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.
  
  import argparse
  import json
  import sys
  import yaml
  
  import shade
  import shade.inventory
  
  
  def output_format_dict(data, use_yaml):
      if use_yaml:
          return yaml.safe_dump(data, default_flow_style=False)
      else:
          return json.dumps(data, sort_keys=True, indent=2)
  
  
  def get_parser():
      parser = argparse.ArgumentParser(description='OpenStack Inventory Module',
                                       prog='shade-inventory')
      parser.add_argument('--refresh', action='store_true',
                          help='Refresh cached information')
      group = parser.add_mutually_exclusive_group(required=True)
      group.add_argument('--list', action='store_true',
                         help='List active servers')
      group.add_argument('--host', help='List details about the specific host')
      parser.add_argument('--private', action='store_true', default=False,
                          help='Use private IPs for interface_ip')
      parser.add_argument('--cloud', default=None,
                          help='Return data for one cloud only')
      parser.add_argument('--yaml', action='store_true', default=False,
                          help='Output data in nicely readable yaml')
      parser.add_argument('--debug', action='store_true', default=False,
                          help='Enable debug output')
      return parser
  
  
  def parse_args():
      return get_parser().parse_args()
  
  
  def main():
      args = parse_args()
      try:
          shade.simple_logging(debug=args.debug)
          inventory = shade.inventory.OpenStackInventory(
              refresh=args.refresh, private=args.private,
              cloud=args.cloud)
          if args.list:
              output = inventory.list_hosts()
          elif args.host:
              output = inventory.get_host(args.host)
          print(output_format_dict(output, args.yaml))
      except shade.OpenStackCloudException as e:
          sys.stderr.write(e.message + '\n')
          sys.exit(1)
      sys.exit(0)
  
  
  if __name__ == '__main__':
      main()
  
subject: Split parser creation and parser for inventory