Wednesday, 24 September 2014

Why Python 4.0 won't be like Python 3.0


Newcomers to python-ideas occasionally make reference to the idea of "Python 4000" when proposing backwards incompatible changes that don't offer a clear migration path from currently legal Python 3 code. After all, we allowed that kind of change for Python 3.0, so why wouldn't we allow it for Python 4.0?


I've heard that question enough times now (including the more concerned phrasing "You made a big backwards compatibility break once, how do I know you won't do it again?"), that I figured I'd record my answer here, so I'd be able to refer people back to it in the future.


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By Tux Machines



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