Python < restriction of limited api extension

[replabrobin (Robin Becker)]

I asked here about the issue here

C stable api PY_SSIZE_T_CLEAN error

I maintain an optional reportlab c extension rl-accel · PyPI It has been working fine in Python 3.7 - 3.12 when compiled as a stable api 3.7 extension. Problems were observed using this in 3.13 and 3.14 and I was advised that changes had made some commen macros behave differently. Compiling with a later python would improve things although speed might be reduced. I now observe the following error when using a Python 3.14/3.13 compiled extension with python <=3.12 File “/home/robin/devel/re…

I looked at the sources of 3.12.9 and 3.13.2 and see that PY_SSIZE_T_CLEAN seems to have no usage at all in the 3.13 code. So there’s no obvious way to allow PyArg_ParseTuple to work across the 3.12 - 3.13 boundary if compiled in 3.13. If I compile in <3.13 I see other errors related to refcounts etc in 3.13/3.14.