It's fully supported. However, some parts only via a library. Anyway, to drill down my argument. It doesn't matter how slow or fast it is: python's floats ints,

It's fully supported. However, some parts only via a library. Anyway, to drill down my argument. It doesn't matter how slow or fast it is: python's floats ints,... are boxed. Your performance is down the drain before you even start looking at the value at hand. If you want any kind of performance at all while crunching numbers you will not be doing it in Python (which is exactly what happens when you use things like numpy)