We are integrating Python as an embedded interpreter in a C++ application to provide a plugin interface for end users. Our codebase is transitioning to a multi-threaded architecture, where each independent unit of work utilizes its own subinterpreter with a separate GIL. This functionality became available in Python 3.12.

We have modified the bundled version of python-rapidjson to ensure compatibility with our setup. The modified version can be found here: https://github.com/yandex/yatool/blob/main/devtools/ymake/contrib/python-rapidjson/rapidjson.cpp

I want to refactor and upstream the subinterpreters compatibility changes in several PRs, ensuring clean and maintainable code.

Are you interested in this feature?

Note: I'm aware that some projects consider subinterpreters to be not fully mature for production use. Therefore, I would like to assess the community’s interest before proceeding with the development.