Method setattro

crates/vm/src/builtins/weakproxy.rs:161–169

(
        zelf: &Py<Self>,
        attr_name: &Py<PyStr>,
        value: PySetterValue,
        vm: &VirtualMachine,
    )

impl SetAttr for PyWeakProxy {
    fn setattro(
        zelf: &Py<Self>,
        attr_name: &Py<PyStr>,
        value: PySetterValue,
        vm: &VirtualMachine,
    ) -> PyResult<()> {
        let obj = zelf.try_upgrade(vm)?;
        obj.call_set_attr(vm, attr_name, value)
    }
}

fn proxy_upgrade(obj: &PyObject, vm: &VirtualMachine) -> PyResult {