Function reversed

crates/vm/src/stdlib/builtins.rs:1028–1039

(obj: PyObjectRef, vm: &VirtualMachine)

    #[pyfunction]
    pub fn reversed(obj: PyObjectRef, vm: &VirtualMachine) -> PyResult {
        if let Some(reversed_method) = vm.get_method(obj.clone(), identifier!(vm, __reversed__)) {
            reversed_method?.call((), vm)
        } else {
            vm.get_method_or_type_error(obj.clone(), identifier!(vm, __getitem__), || {
                "argument to reversed() must be a sequence".to_owned()
            })?;
            let len = obj.length(vm)?;
            let obj_iterator = PyReverseSequenceIterator::new(obj, len);
            Ok(obj_iterator.into_pyobject(vm))
        }
    }

    #[derive(FromArgs)]
    pub struct RoundArgs {