How to return PyArray2<PySet<usize>>

[deadsoul44]

I am trying to return PyArray2<PySet>:

    pub fn predict_nodes<'py>(
        &self,
        py: Python<'py>,
        flat_data: PyReadonlyArray1<f64>,
        rows: usize,
        cols: usize,
        parallel: Option<bool>,
    ) -> PyResult<Bound<'py, PyArray2<PySet<usize>>>> {
        let flat_data = flat_data.as_slice()?;
        let data = Matrix::new(flat_data, rows, cols);
        let parallel = parallel.unwrap_or(true);

        let value: Vec<Vec<HashSet<usize>>> = self.booster.predict_nodes(&data, parallel);
        let py_array: Bound<'py, PyArray2<PySet<usize>>> = PyArray2::from_vec2(py, &value)?;

        Ok(py_array.into_pyobject(py)?)
    }

but I keep getting:

error[E0034]: multiple applicable items in scope
   --> src\booster.rs:356:10
    |
356 |     ) -> PyResult<Bound<'py, PyArray2<PySet<usize>>>> {
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ multiple `wrap` found
    |
    = note: candidate #1 is defined in an impl for the type `IntoPyConverter<Result<T, E>>`
    = note: candidate #2 is defined in an impl for the type `IntoPyConverter<T>`
    = note: candidate #3 is defined in an impl for the type `IntoPyObjectConverter<Result<T, E>>`
    = note: candidate #4 is defined in an impl for the type `IntoPyObjectConverter<T>`
    = note: and 2 others

How can I solve this issue?

[davidhewitt]

I cannot naively reproduce this.

PySet<usize> doesn't look correct, the type exposed by PyO3 is not generic.

Can you provide a minimal repro?