[stub] How to specify a custom return type?

[moi15moi]

Is there a way to only specify a custom return type?
In my case, I want to specify tuple[list[int], fractions.Fraction, fractions.Fraction] instead of def get_pts(self, filename: str, index: int) -> tuple[list[int], fractions.Fraction, fractions.Fraction].

NB_MODULE(abc_video_provider, m) {
    nanobind::class_<ABCVideoProvider>(m, "ABCVideoProvider")
        .def(
            "get_pts",
            &ABCVideoProvider::get_pts,
            nanobind::arg("filename"),
            nanobind::arg("index"),
            nanobind::sig("def get_pts(self, filename: str, index: int) -> tuple[list[int], fractions.Fraction, fractions.Fraction]"),
            R"doc(
            Parameters:
                filename (str): A video path.
                index (int): Index of the video stream.

            Returns:
                A tuple containing these 3 informations:

                    1. A list of each pts sorted.
                    2. The time_base.
                    3. The fps.
            )doc"
        );
}