Function isqrt

crates/stdlib/src/math.rs:772–776

(x: ArgIndex, vm: &VirtualMachine)

    #[pyfunction]
    fn isqrt(x: ArgIndex, vm: &VirtualMachine) -> PyResult<BigInt> {
        let value = x.into_int_ref();
        pymath::math::integer::isqrt(value.as_bigint())
            .map_err(|_| vm.new_value_error("isqrt() argument must be nonnegative"))
    }

    #[pyfunction]
    fn gcd(args: PosArgs<ArgIndex>) -> BigInt {