Function py_session_request_to_parts

sdk/python/src/lib.rs:6427–6460

(
    request: &Bound<'_, PyDict>,
)

}

fn py_session_request_to_parts(
    request: &Bound<'_, PyDict>,
) -> PyResult<(
    String,
    Option<Vec<RustMessage>>,
    Vec<a3s_code_core::llm::Attachment>,
)> {
    let prompt = request
        .get_item("prompt")?
        .ok_or_else(|| PyValueError::new_err("request missing 'prompt' field"))?
        .extract::<String>()?;

    let history = match request.get_item("history")? {
        Some(value) => {
            let list = value
                .downcast::<PyList>()
                .map_err(|_| PyTypeError::new_err("request.history must be a list"))?;
            Some(py_list_to_messages(list)?)
        }
        None => None,
    };

    let attachments = match request.get_item("attachments")? {
        Some(value) => {
            let list = value
                .downcast::<PyList>()
                .map_err(|_| PyTypeError::new_err("request.attachments must be a list"))?;
            py_attachment_list_to_rust(list)?
        }
        None => Vec::new(),
    };

    Ok((prompt, history, attachments))
}

fn py_session_input_to_parts(
    input: &Bound<'_, PyAny>,