Navigate up by one level.

        For example, if you are in `(aws)/stack:.../asg:.../`, executing `up` will place you in `(aws)/stack:.../`.

        up -h for more details

def do_up(self,args):
        """
        Navigate up by one level.

        For example, if you are in `(aws)/stack:.../asg:.../`, executing `up` will place you in `(aws)/stack:.../`.

        up -h for more details
        """
        parser = CommandArgumentParser("up")
        args = vars(parser.parse_args(args))
        if None == self.parent:
            print "You're at the root. Try 'quit' to quit"
        else:
            return True