[Python-Dev] Process to remove a Python feature (original) (raw)

Serhiy Storchaka storchaka at gmail.com
Fri May 4 14:48:55 EDT 2018

04.05.18 20:57, Matthias Bussonnier пише:

But when I hit a DeprecationWarning message there is one crucial piece of information missing most of the time: Since which version number it's deprecated (and sometime since when the replacement is available could be good if overlap between functionality there was).

I think the information about since which version number it will be removed is more useful. Different cases need different deprecation periods. The more common the case, the longer deprecation period should be. Some recently added warnings contain this information.

Ideally any deprecated feature should have a replacement, and this replacement should be available in at least one version before adding the deprecation warning.

X.Y: added a replacement

X.Y+1: added a deprecation warning. Many users need to support only two recent versions and can move to using the replacement now.

X.Y+3 (or X.Y+2): removed the deprecated feature. Versions older than X.Y should grew out of use at that moment.

More information about the Python-Dev mailing list