Function pyo3_get_value_into_pyobject

fn pyo3_get_value_into_pyobject<ClassT, FieldT, Offset>(
    py: Python<'_>,
    obj: *mut PyObject,
) -> PyResult<*mut PyObject>
where
    ClassT: PyClass,
    for<'py> FieldT: IntoPyObject<'py> + Clone,
    Offset: OffsetCalculator<ClassT, FieldT>,