def _validate_args(self):
        
        if self.args.keep_days is not None and 1 < self.args.keep_days:
            raise argparse.ArgumentError(None, "keep_days must "\
                "be greater than 0. ")
        return
dataset/ETHPy150Open amorton/cassback/cassback/subcommands/purge_subcommand.py/PurgeSubCommand._validate_args/swapped operands of `<`