gh-133925: Make typing._UnionGenericAlias hashable#133929
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Lib/typing.py Outdated
| def__hash__(self): | ||
| returnsuper().__hash__() |
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This means that a Union instance and a _UnionGenericAlias instance might compare equal but hash differently, right? Might that do counterintuitive things if you used them as dictionary keys or put them in sets?
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I think that this is purely about the _UnionGenericAlias class itself, not _UnionGenericAlias instances.
Btw, do we need to add __hash__ tests to instances in other PR?
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I think that this is purely about the
_UnionGenericAliasclass itself, not_UnionGenericAliasinstances.
ah, thanks, great point. It still seems like users are storing the classes themselves in sets, though, so I think my point still applies -- the bug report here comes from astropy/astropy#18126
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Yes, I should have made it hash() equal to Union. Fixed now.
JelleZijlstra merged commit 8d478c7 into python:mainUh oh!
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Thanks @JelleZijlstra for the PR 🌮🎉.. I'm working now to backport this PR to: 3.14. |
GH-133936 is a backport of this pull request to the 3.14 branch. |
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typing._UnionGenericAliasis unhashable in 3.14 #133925