Function from_py_with_with_default 

pub fn from_py_with_with_default<'a, 'py, T>(
    obj: Option<&'a Bound<'py, PyAny>>,
    arg_name: &str,
    extractor: fn(&'a Bound<'py, PyAny>) -> PyResult<T>,
    default: fn() -> T,
) -> PyResult<T>

Alternative to extract_argument used when the argument has a #[pyo3(from_py_with)] annotation and also a default value.