Gustavo Carneiro schrieb am 30.07.2018 um 16:18:
What is the relation to PEP 384? https://www.python.org/dev/peps/pep-0384/
The "stable ABI" is a restricted API/ABI that breaks backwards compatibility with all extension modules out there. If you write code against this API, then you can make it work in newer CPython versions without recompilation. This does not apply to any previously existing C extension, which means that any changes to the non-stable parts of the C-API would still break the world.