> > On Thu, 21 Apr 2022 at 02:45, malmiteria <martin.mi...@ensc.fr> wrote: > > 4) Lib refactoring are breaking changes > > A Lib author refactoring his code by extracting a class as a parent > class of multiple of the class provided is introducing a breaking change. > <snip>
> > After refactoring, the MRO is now N1, N2, GP. Which do behave > differently, in general. > Sure -- but there's nothing special or difficult here -- refactoring can create breaking changes. I believe it was part of Hettinger's thesis in "Super Considered Super" that the use of super() is part of the API of a class hierarchy. Indeed, the MRO of a class hierarchy is part of the API. If you change the MRO, it is a potentially breaking change, just as if a method is added or removed, or renamed, or ... Nothing to see here -- this is all deliberate, and useful. -CHB -- Christopher Barker, PhD (Chris) Python Language Consulting - Teaching - Scientific Software Development - Desktop GUI and Web Development - wxPython, numpy, scipy, Cython
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