[Python-Dev] [Python-3000] Warning for 2.6 and greater (original) (raw)

"Martin v. Löwis" martin at v.loewis.de
Fri Jan 12 09:19:52 CET 2007

Georg Brandl schrieb:

If Python 3.0 was simply a release which removed deprecated features, there would clearly be no issue. I would update my code in advance of the 3.0 release to not use any of those features being removed, and I'm all set. But that's not what I'm hearing. Python 3 is both adding new ways to do things, and removing the older way, in the same version, with no overlap. This makes me very anxious. It has always been planned that in those cases that allow it, the new way to do it will be introduced in a 2.x release too, and the old way removed only in 3.x.

What does that mean for the example James gave: if dict.items is going to be an iterator in 3.0, what 2.x version can make it return an iterator, when it currently returns a list?

There simply can't be a 2.x version that introduces the new way, as it is not merely a new API, but a changed API.

Regards, Martin

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