protected List<String> argList = new ArrayList<>();

    public PythonJob filename(final String filename) {
        this.filename = filename;
        return this;
    }

    public PythonJob arg(final String value) {
        argList.add(value);
        return this;
    }

    public PythonJob args(final String... values) {
        stream(values).of(stream -> stream.forEach(argList::add));
        return this;