[Python-Dev] Backporting PEP 414 (original) (raw)

Antoine Pitrou solipsis at pitrou.net
Tue Feb 28 22:33:37 CET 2012

On Tue, 28 Feb 2012 16:23:40 -0500 Chris McDonough <chrism at plope.com> wrote:

On Tue, 2012-02-28 at 15:54 -0500, Benjamin Peterson wrote: > 2012/2/28 Ethan Furman <ethan at stoneleaf.us>: > > Here's what I know: > > > > We don't add features to bug-fix releases. > > u'' is considered a feature. > > By not backporting to 3.1 and 3.2 we are not easing the migration pains from > > 2.x. > > > > > > Here's what I don't know: > > > > Why is readding u'' a feature and not a bug? (Just had a thought about this > > -- because the removal of u'' is documented.) > > Because it's a new "thing" which doesn't fix obviously broken behavior. > > > > > > > If there is already a FAQ entry feel free to point me to it, but I would > > still be curious why, in this instance, practicality does not beat purity? > > Because it's practical not to break bugfix releases with new features.

This change, by its nature, cannot break old programs.

Unless the implementation is buggy, or has unintended side-effects. In theory, most changes done in feature releases cannot break old programs. Reality is often a bit more surprising :)

Regards

Antoine.

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