Function pyo3_get_value_into_pyobject 

unsafe fn pyo3_get_value_into_pyobject<ClassT, FieldT, const OFFSET: usize>(
    py: Python<'_>,
    obj: NonNull<PyObject>,
) -> PyResult<*mut PyObject>
where
    ClassT: PyClass,
    for<'py> FieldT: IntoPyObject<'py> + Clone,

Gets a field value from a pyclass and produces a python value using IntoPyObject for FieldT, after cloning the value.

Safety

• obj must be a valid pointer to an instance of ClassT
• there must be a value of type FieldT at the calculated offset within ClassT