class CommandType(type):
      def __init__(cls, name, bases, attrs):
          super(CommandType, cls).__init__(name, bases, attrs)
  name = getattr(cls, name, cls.__name__.lower())
          cls.name = name
          if name != 'command':
            commands[name] = cls
Command = CommandType('Command', (object,), {'run': lambda self, args: None})
class Help(Command):
      """Display the list of available commands"""
      def run(self, args):
          print("Available commands:\n")
  names = list(commands)
  padding = max([len(k) for k in names]) + 2
          for k in sorted(names):
  name = k.ljust(padding, ' ')
  doc = (commands[k].__doc__ or '').strip()
              print("    %s%s" % (name, doc))
          print("\nUse '%s <command> --help' for individual command help." % sys.argv[0].split(os.path.sep)[-1])
            