Hi all, Warning: if you're using the extregistry, I just refactored its interface. I think the result is nicer -- you don't have to define a bunch of functions and link them together in a register_xxx() call; instead, all relevant functions are now methods on a class that is linked via a class method call or automatically with a metaclass trick. The motivation for this was a subtle annotation crash in rctypes: indeed, in the previous model, families of built-in functions (e.g. all ctypes function objects) would get annotated in a way that kept creating new closures. The annotator was then complaining about the resulting SomeBuiltin annotation: as it stores the closure in question, it was always different whenever a block was reflown through the annotator. This refactoring was pending for some time, because previously some functions were missing some information and had to hack around to get at it. A bientot, Armin.