How to register a callback function witjh atexit.register using pyo3

help
1

I want to run a cleanup method in a class (pyo3) when Python exits.
The code is as follows:

    fn register_at_exit(&self, py: Python) -> PyResult<()> {
        let fun: Py<PyAny> = PyModule::import_bound(py, "atexit")?.getattr("register")?.into();
        let closure = |
            args: &Bound<'_, PyTuple>,
            _kwargs: Option<&Bound<'_, PyDict>>
        | -> PyResult<()> {
            self.instance.shutdown(None);
            Ok(())
        };
        let cbfunc = PyCFunction::new_closure_bound(py, None, None, closure)?;
        let _ = fun.call1(py, (cbfunc,))?;
        Ok(())
    }

The problem is that new_closure_bound only accepts an Fn type function, but the closure is an FnMut, because the containing function call self.instance.shutdown(None) is an FnMut.

2

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