def argument(self, key=None):
        if key is None:
            return self.input.get_arguments()

        return self.input.get_argument(key)
Create a directory at ``path`` relative to the temp directory for
dataset/ETHPy150Open sdispater/cleo/cleo/commands/command.py/Command.argument--crossover with--dataset/ETHPy150Open Yelp/mrjob/tests/mockssh.py/mock_ssh_dir