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Implement PEP 798 – Unpacking in Comprehensions #143055
Description
Proposal:
This is a tracking issue for implementing PEP 798 (Unpacking in Comprehensions).
Links to previous discussion of this feature:
- https://discuss.python.org/t/pre-pep-unpacking-in-comprehensions/96362
- https://discuss.python.org/t/pep-798-unpacking-in-comprehensions/99435
Linked PRs
Reacted by Bartosz Sławecki, Ilya Solin, Accurio and Denis Staritin
Activity
gh-143055: Implementation of PEP 798 (#143056)
hugovk commentedon Feb 6, 2026
Good work, #143056 is merged and will be in next week's 3.15 alpha 6! 🎉
Anything else to do here, or shall we close this issue?
adqm commentedon Feb 7, 2026
Yep, I think we're good here! The initial implementation is done, and I feel like if anything comes up with it, it'd probably be better as a new issue. I'll go ahead and close this now; thanks!
hugovk commentedon Feb 7, 2026
Sounds good! Would you like to open a PR to mark the PEP as Final? There's a checklist at https://github.com/python/peps/blob/main/.github/PULL_REQUEST_TEMPLATE/Mark%20a%20PEP%20as%20Final.md.
pythongh-143055: Implementation of PEP 798 (python#143056)
[-]Implement PEP 798[/-][+]Implement PEP 798 – Unpacking in Comprehensions[/+]StanFromIreland commentedon Mar 9, 2026
Reopening for #145556, the AST unparser was not updated appropriately.
gh-143055: Fix crash in AST unparser when unparsing dict comprehensio…
pythongh-143055: Fix crash in AST unparser when unparsing dict compre…
pythongh-143055: address review (fix throw() arity crash, doc precision)
pythongh-143055: register _PyAsyncGenUnpack_Type with the C globals a…
pythongh-143055: Delegate to subiterators when unpacking in generator…
pythongh-143055: address review (fix throw() arity crash, doc precision)
pythongh-143055: register _PyAsyncGenUnpack_Type with the C globals a…