use pyo3::prelude::*; use pyo3::wrap_pyfunction; #[pyfunction] fn sum_as_string(a: usize, b: usize) -> PyResult { Ok((a + b).to_string()) } #[pymodule] fn nac3embedded(py: Python, m: &PyModule) -> PyResult<()> { m.add_function(wrap_pyfunction!(sum_as_string, m)?)?; Ok(()) }