Documentation

See #103912 (comment) for full context.

Specific problem:

It appears tp_bases of object was an empty tuple in the past, but is now NULL, could that be? Is that intentional?

If intentional, could it please be documented? I think the behavior change is likely to trip up fair a number of people.

I looked in https://github.com/python/cpython/blob/edd0cb8e77d7b65f5a9c2c69dc81f9c4514878d5/Doc/whatsnew/3.12.rst but don't see tp_bases being mentioned there.

I also verified that the tp_bases == nullptr patch is still needed with current 3.12 HEAD (edd0cb8).

Linked PRs

• gh-105020: Share tp_bases and tp_mro Between Interpreters For All Static Builtin Types #105115
• [3.12] gh-105020: Share tp_bases and tp_mro Between Interpreters For All Static Builtin Types (gh-105115) #105124