I like it. It gives you (f)actual private fields in python, as title and name can't be accessed via the instance variable of f.

That also works in JavaScript:

    function Fraction(a, b) {
        this.value = function () {
            return a / b; 
        }
    }

    const half = new Fraction(1, 2);

It feels weird to me, that classes were eventually introduced in JS.