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Title: gh-142414: Make value, not identity, matter for UNBOUND* objects by encukou · Pull Request #145184 · python/cpython · GitHub

Open Graph Title: gh-142414: Make value, not identity, matter for UNBOUND* objects by encukou · Pull Request #145184 · python/cpython

X Title: gh-142414: Make value, not identity, matter for UNBOUND* objects by encukou · Pull Request #145184 · python/cpython

Description: I realize there's a pile of PRs for the issue already, I couldn't find a reason why the singletons (UNBOUND, UNBOUND_ERROR, UNBOUND_REMOVE) need to be singletons. Each is essentially a name for the underlying int (used in the C layer); plus UNBOUND doubles as the replacement value but that's not the issue here. I also couldn't find a reason to have different UNBOUND objects in different modules. This converts them to a normal class, and compares by value rather than identity. Issue: gh-142414

Open Graph Description: I realize there's a pile of PRs for the issue already, I couldn't find a reason why the singletons (UNBOUND, UNBOUND_ERROR, UNBOUND_REMOVE) need to be singletons. Each is essentially a name...

X Description: I realize there's a pile of PRs for the issue already, I couldn't find a reason why the singletons (UNBOUND, UNBOUND_ERROR, UNBOUND_REMOVE) need to be singletons. Each is essentiall...

Opengraph URL: https://github.com/python/cpython/pull/145184

X: @github

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d8343bf gh-142414: Make value, not identity, matter for UNBOUND* objects encukou Feb 24, 2026 https://github.com/python/cpython/pull/145184/commits/d8343bff8a567c767549fd7fd54d378e3545adab
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20d4e20 Add the repro test into test_queues.py. note35 Dec 11, 2025 https://github.com/python/cpython/pull/145184/commits/20d4e20768cab0c25587068f7133030c98bb7f90
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