def argument(self, key=None):
        """
        Get the value of a command argument.

        :param key: The argument name
        :type key: str

        :rtype: mixed
        """
        if key is None:
            return self.input.get_arguments()

        return self.input.get_argument(key)
dataset/ETHPy150Open sdispater/cleo/cleo/commands/command.py/Command.argument/original