gh-132139: Document that you can no longer set attributes on unions#132146
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bedevere-appbot added awaiting core review docs 
AA-Turner approved these changes Apr 6, 2025
chris-eibl approved these changes Apr 6, 2025
sobolevn approved these changes Apr 6, 2025
picnixz approved these changes Apr 6, 2025
Eclips4 approved these changes Apr 6, 2025
AA-Turner merged commit dbfc6a4 into python:main 35 checks passed
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Closes#132139.
typing.Uniondoes not support attribute assignment post gh-105511 #132139📚 Documentation preview 📚: https://cpython-previews--132146.org.readthedocs.build/