gh-143831: Compare cells by identity in forward references#143848
Merged
JelleZijlstra merged 14 commits intopython:mainfrom Jan 19, 2026
Merged
gh-143831: Compare cells by identity in forward references#143848JelleZijlstra merged 14 commits intopython:mainfrom
JelleZijlstra merged 14 commits intopython:mainfrom
Conversation
Loading
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
5 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Cells are mutable and, in regular comparison, they are equal when their contents are equal (or if both are empty).
Two different cells should not be considered equal by value in forward references, though.
If there are two separate cells, they either (1) target different variables or (2) belong to different scopes, so two separate forward references storing two separate cells are conceptually unequal even if these cells happen to be equal at a given point in time. Mutability, essentially.
I'm still working on tests.✅TypeError: unhashable type: 'cell'#143831