The next beta review period of Unicode, Unicode 18, is expected to last from May to July 2026. Beta Review Status. Given that according to PEP 790 – Python 3.15 Release Schedule | peps.python.org, no new features will be allowed starting in 3.15beta1, such feature would be added in the upcoming 3.16: PEP 826 – Python 3.16 Release Schedule | peps.python.org
This may seem contrived now, but suppose that a future Unicode’s beta review period overlaps with a future Python version’s alpha releases. I think that it would be helpful within cpython/Tools/unicode/makeunicodedata.py at main · python/cpython to allow pre-release UCD files to be exposed in the unicodedata module through some option, given that by a Unicode’s beta review period, code points and names are guranteed to be fixed.