old_contents: import uuid
  
  import prettytable
  
  from keystoneclient import exceptions
  
  
  # Decorator for cli-args
  def arg(*args, **kwargs):
      def _decorator(func):
          # Because of the sematics of decorator composition if we just append
          # to the options list positional options will appear to be backwards.
          func.__dict__.setdefault('arguments', []).insert(0, (args, kwargs))
          return func
      return _decorator
  
  
  def pretty_choice_list(l):
      return ', '.join("'%s'" % i for i in l)
  
  
  def print_list(objs, fields, formatters={}):
      pt = prettytable.PrettyTable([f for f in fields], caching=False)
      pt.aligns = ['l' for f in fields]
  
      for o in objs:
          row = []
          for field in fields:
              if field in formatters:
                  row.append(formatters[field](o))
              else:
                  field_name = field.lower().replace(' ', '_')
                  data = getattr(o, field_name, '')
                  row.append(data)
          pt.add_row(row)
  
      pt.printt(sortby=fields[0])
  
  
  def print_dict(d):
      pt = prettytable.PrettyTable(['Property', 'Value'], caching=False)
      pt.aligns = ['l', 'l']
      [pt.add_row(list(r)) for r in d.iteritems()]
      pt.printt(sortby='Property')
  
  
  def find_resource(manager, name_or_id):
      """Helper for the _find_* methods."""
      # first try to get entity as integer id
      try:
          if isinstance(name_or_id, int) or name_or_id.isdigit():
              return manager.get(int(name_or_id))
      except exceptions.NotFound:
          pass
  
      # now try to get entity as uuid
      try:
          uuid.UUID(str(name_or_id))
          return manager.get(name_or_id)
      except (ValueError, exceptions.NotFound):
          pass
  
      # finally try to find entity by name
      try:
          return manager.find(name=name_or_id)
      except exceptions.NotFound:
          msg = "No %s with a name or ID of '%s' exists." % \
                (manager.resource_class.__name__.lower(), name_or_id)
          raise exceptions.CommandError(msg)
  
new_contents: import uuid
  
  import prettytable
  
  from keystoneclient import exceptions
  
  
  # Decorator for cli-args
  def arg(*args, **kwargs):
      def _decorator(func):
          # Because of the sematics of decorator composition if we just append
          # to the options list positional options will appear to be backwards.
          func.__dict__.setdefault('arguments', []).insert(0, (args, kwargs))
          return func
      return _decorator
  
  
  def pretty_choice_list(l):
      return ', '.join("'%s'" % i for i in l)
  
  
  def print_list(objs, fields, formatters={}):
      pt = prettytable.PrettyTable([f for f in fields], caching=False)
      pt.aligns = ['l' for f in fields]
  
      for o in objs:
          row = []
          for field in fields:
              if field in formatters:
                  row.append(formatters[field](o))
              else:
                  field_name = field.lower().replace(' ', '_')
                  data = getattr(o, field_name, '')
                  row.append(data)
          pt.add_row(row)
  
      pt.printt(sortby=fields[0])
  
  
  def print_dict(d):
      pt = prettytable.PrettyTable(['Property', 'Value'], caching=False)
      pt.aligns = ['l', 'l']
      [pt.add_row(list(r)) for r in d.iteritems()]
      pt.printt(sortby='Property')
  
  
  def find_resource(manager, name_or_id):
      """Helper for the _find_* methods."""
      # first try to get entity as integer id
      try:
          if isinstance(name_or_id, int) or name_or_id.isdigit():
              return manager.get(int(name_or_id))
      except exceptions.NotFound:
          pass
  
      # now try to get entity as uuid
      try:
          uuid.UUID(str(name_or_id))
          return manager.get(name_or_id)
      except (ValueError, exceptions.NotFound):
          pass
  
      # finally try to find entity by name
      try:
          return manager.find(name=name_or_id)
      except exceptions.NotFound:
          msg = "No %s with a name or ID of '%s' exists." % \
                (manager.resource_class.__name__.lower(), name_or_id)
          raise exceptions.CommandError(msg)
  
  
  def unauthenticated(f):
      """ Adds 'unauthenticated' attribute to decorated function.
  
      Usage:
          @unauthenticated
          def mymethod(f):
              ...
      """
      f.unauthenticated = True
      return f
  
  
  def isunauthenticated(f):
      """
      Checks to see if the function is marked as not requiring authentication
      with the @unauthenticated decorator. Returns True if decorator is
      set to True, False otherwise.
      """
      return getattr(f, 'unauthenticated', False)
  
subject: Support for version and extension discovery