Bug report

Bug description:

Python 3.11.6 (tags/v3.11.6:8b6ee5b, Oct  2 2023, 14:57:12) [MSC v.1935 64 bit (AMD64)] on win32>>> None.__ne__(None)False

Python 3.12.0 (tags/v3.12.0:0fb18b0, Oct  2 2023, 13:03:39) [MSC v.1935 64 bit (AMD64)] on win32>>> None.__ne__(None)NotImplemented

In 3.11,None.__ne__(None) returnedFalse but in 3.12 it returnsNotImplemented. This is a breaking behavior change that is either a bug or should be documented.

CPython versions tested on:

3.11, 3.12

Operating systems tested on:

Windows

Linked PRs

• gh-112125: Fix None.__ne__(None) returning NotImplemented instead of False #112504
• [3.12] gh-112125: Fix None.__ne__(None) returning NotImplemented instead of … #112827