The beta is now out. The big incompatible change is probably PyCode_New() (in order to support positional only parameters). At least Cython is broken by this change, probably other extensions. Hopefully it will not be long for that to be fixed.
Lots of other neat changes. The f-string debugging with '=' will be handy. There are a number of minor speedups and so this should be the fastest Python yet released.
Lots of other neat changes. The f-string debugging with '=' will be handy. There are a number of minor speedups and so this should be the fastest Python yet released.