#[staticmethod] in subclass

[Rexagon]

This library is amazing in terms of usability, api is very intuitive!

However I stumbled upon an unexpected problem. Consider the following code:

#[pyclass(subclass)]
pub struct Seed(...);

#[pyclass(extends = Seed)]
pub struct Bip39Seed;

#[pymethods]
impl Bip39Seed {
    #[staticmethod]
    fn generate() -> PyClassInitializer<Self> {
        ...
        PyClassInitializer::from(seed).add_subclass(Self)
    }
}

There I'm trying to create a subclass with a static method. However, for the result type it expects something to be casted to PyObject and is unable to compile PyClassInitializer:

the trait `pyo3::IntoPy<pyo3::Py<pyo3::PyAny>>` is not implemented for `pyo3::PyClassInitializer<crypto::Bip39Seed>`

Changing result type to (Self, Seed) doesn't work either.

What is a recommended way to resolve this issue?

(It seems that PyObjectInit can be used, but I hope it is possible to avoid unsafe for simple things)

[davidhewitt]

Try

    #[staticmethod]
    fn generate(py: Python) -> PyResult<Py<Self>> {
        ...
        Py::new(py, PyClassInitializer::from(seed).add_subclass(Self))
    }