How do you return a PyObject in 0.25?

[jmacglashan]

It's been sometime since I wrote things in pyo3 and the API has changed a fair amount.

I used to be able to define a function that received an arbitrary PyObject and returned a PyObject:

fn my_func(obj: PyObject) -> PyObject {
    ...
}

or if I wanted to wrap in a result:

fn my_func(obj: PyObject) -> PyResult<PyObject> {
    ...
}

This is apparently not longer valid. I can receive a generic PyObject as an argument, but the return type is making the compiler grumpy telling me:

the trait `IntoPyObject<'_>` is not implemented for `PyObject`

Pretty shocking that PyObject cannot turn into itself? :p

What's the new way to do this?

[jmacglashan]

Nevermind. I just deleted a bunch of code and rewrote it and now it's happy with PyObject returns. There must have been some other error above confusing the compiler.

[davidhewitt]

Possibly see also #5325, maybe you were unintentionally using the FFI type.