Method __add__

crates/vm/src/builtins/tuple.rs:371–391

(
        zelf: PyRef<Self>,
        other: PyObjectRef,
        vm: &VirtualMachine,
    )

)]
impl PyTuple {
    fn __add__(
        zelf: PyRef<Self>,
        other: PyObjectRef,
        vm: &VirtualMachine,
    ) -> PyArithmeticValue<PyRef<Self>> {
        let added = other.downcast::<Self>().map(|other| {
            if other.elements.is_empty() && zelf.class().is(vm.ctx.types.tuple_type) {
                zelf
            } else if zelf.elements.is_empty() && other.class().is(vm.ctx.types.tuple_type) {
                other
            } else {
                let elements = zelf
                    .iter()
                    .chain(other.as_slice())
                    .cloned()
                    .collect::<Box<[_]>>();
                Self { elements }.into_ref(&vm.ctx)
            }
        });
        PyArithmeticValue::from_option(added.ok())
    }

    #[pymethod]
    fn count(&self, needle: PyObjectRef, vm: &VirtualMachine) -> PyResult<usize> {