How to serialize builtins.Index object?

[JRatschat]

Hi all,

I am currently developing a Dash app and I want to cache the builtins.Index object which is created with the tantivy.Index() command. In order to cache this object, I would need to serialize it with for example json or pickle, which does not seem to be possible. Has anyone of you experience with serializing the object?

Thanks!

[cjrh]

Related: PyO3/pyo3#100