The rationale is that the projects won't start really using Cython 3 until we do the final release. Now, we have 3 big users of Cython migrated, hence I think we have some confidence that Cython 3 is ready. What do you think?
I would not say that mpi4py is a big project, but it is around 15K lines of Cython code, and it is also ready for Cython 3. I'll update mpi4py requirements to `cython>=3` as soon as Cython 3 is released.
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Lisandro Dalcin ============ Senior Research Scientist Extreme Computing Research Center (ECRC) King Abdullah University of Science and Technology (KAUST) http://ecrc.kaust.edu.sa/