PEP 743: Add Py_COMPAT_API_VERSION to the Python C API
Add Py_COMPAT_API_VERSION and Py_COMPAT_API_VERSION_MAX macros to opt-in for planned incompatible C API changes in a C extension. Maintainers can decide when they make their C extension compatible and also decide which future Python version they want to be compatible with. ⌘ Read more