gh-137065: Unmerge types.UnionType and typing.Union #137069
Open
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Partially revert pythonGH-105499. types.UnionType no longer an alias of typing.Union and no longer subscriptable, but subscribing typing.Union returns an instance of types.UnionType. typing.Union can no longer be used in the isinstance() checks.
e57751f to
fb8bc3e
Compare
JelleZijlstra
requested changes
Jul 25, 2025
|
When you're done making the requested changes, leave the comment: |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
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Outdated suggestions cannot be applied.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.
Partially revert GH-105499.
types.UnionType no longer an alias of typing.Union and no longer subscriptable, but subscribing typing.Union returns an instance of types.UnionType. typing.Union can no longer be used in the isinstance() checks.
typing._UnionGenericAlias, nottyping.Union#137065📚 Documentation preview 📚: https://cpython-previews--137069.org.readthedocs.build/