Method __length_hint__

crates/vm/src/builtins/iter.rs:187–197

(&self, vm: &VirtualMachine)

    #[pymethod]
    fn __length_hint__(&self, vm: &VirtualMachine) -> PyObjectRef {
        let internal = self.internal.lock();
        if let IterStatus::Active(obj) = &internal.status {
            let seq = obj.sequence_unchecked();
            seq.length(vm)
                .map(|x| PyInt::from(x).into_pyobject(vm))
                .unwrap_or_else(|_| vm.ctx.not_implemented())
        } else {
            PyInt::from(0).into_pyobject(vm)
        }
    }

    #[pymethod]
    fn __reduce__(&self, vm: &VirtualMachine) -> PyTupleRef {