Relevant:

https://discuss.python.org/t/extending-subinterpreters-with-...

https://stackoverflow.com/questions/3068139

https://wiki.python.org/moin/SandboxedPython

https://github.com/jailctf/pyjailbreaker

https://healeycodes.com/running-untrusted-python-code

https://lwn.net/Articles/574215/