Function _remove_dead_weakref

crates/vm/src/stdlib/_weakref.rs:51–64

(
        dict: PyDictRef,
        key: PyObjectRef,
        vm: &VirtualMachine,
    )

    #[pyfunction]
    fn _remove_dead_weakref(
        dict: PyDictRef,
        key: PyObjectRef,
        vm: &VirtualMachine,
    ) -> PyResult<()> {
        dict._as_dict_inner()
            .delete_if(vm, &*key, |wr| {
                let wr = wr
                    .downcast_ref::<PyWeak>()
                    .ok_or_else(|| vm.new_type_error("not a weakref"))?;
                Ok(wr.is_dead())
            })
            .map(drop)
    }
}