Description

ngoldbaum

opened on Dec 30, 2025

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I'd like to add a new C API to allow extensions to mark objects as immortal. See https://discuss.python.org/t/add-an-unstable-c-api-for-immortalizing-objects/105461 for discussion. I'm opening this issue to link a future PR and for visibility for people who don't look at discourse regularly.

Linked PRs

• gh-143300: implement PyUnstable_SetImmortal #144543

Activity

1. ZeroIntensity

   added

   topic-C-API

   on Dec 30, 2025
2. picnixz commented on Dec 30, 2025

   

   picnixz

   on Dec 30, 2025

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   Considering this idea was already supported by a core dev and that another core dev chimed in to support it, I think it's fine to keep the issue. However, please note that I would have closed it because we don't want issues just for visibility or PRs just for PoCs. Those should be kept in forks, and discussion should still be kept on DPO.

   However, if the proposal becomes too large, it may require a PEP, in which case I'd prefer closing the issue now instead of having back and forth.

   @ZeroIntensity Do you think this requires a PEP? if so, I'd rather close this issue now as the process may be long.
3. picnixz

   added

   type-featureA feature request or enhancementA feature request or enhancement

   interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

   triagedThe issue has been accepted as valid by a triager.The issue has been accepted as valid by a triager.

   and removed

   triagedThe issue has been accepted as valid by a triager.The issue has been accepted as valid by a triager.

   on Dec 30, 2025
4. ZeroIntensity commented on Dec 30, 2025

   

   ZeroIntensity

   on Dec 30, 2025

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   This shouldn't need a PEP, as the idea and implementation are pretty simple. (This isn't proposing immortalization for arbitrary objects; that would require a PEP.) Though we should try to get the C API WG's blessing, because I suspect Petr has some reservations about the dangers of immortality.
5. kumaraditya303

   added a commit that references this issue on Feb 11, 2026

   gh-143300: implement `PyUnstable_SetImmortal` for marking objects as …

   347d359
6. kumaraditya303

   closed this as completedon Feb 11, 2026
7. thunder-coding

   added a commit that references this issue on Feb 15, 2026

   pythongh-143300: implement `PyUnstable_SetImmortal` for marking objec…

   fa84fb6
8. brijkapadia

   added a commit that references this issue on Feb 28, 2026

   pythongh-143300: implement `PyUnstable_SetImmortal` for marking objec…

   2ce2e1e
9. ljfp

   added a commit that references this issue on Apr 25, 2026

   pythongh-143300: implement `PyUnstable_SetImmortal` for marking objec…

   4e03924

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