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Benjamin Peterson <benjamin <at> python.org> writes:
This policy applys to all public APIs.
applies?
* The behavior of an API *must* not change between any two consecutive releases.
* A feature cannot be removed without notice between any two consecutive releases.
By induction, this would mean no API could change and no feature could be removed without notice between any N consecutive releases. Do you really mean it?
* Addition of a feature which breaks 3rd party libraries or applications should have a large benefit to breakage ratio, and/or the incompatibility should be trival to fix in broken code.
There is always the possibility that a new feature breaks existing code, for example because it relies on a similarly named attribute, or on some obscure internal condition. I think this should be qualified so that it only applies when e.g. a fair number of third-party apps or libraries are broken.