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Title: gh-141510: Document isinstance change for frozendict in What's New by vstinner · Pull Request #146107 · python/cpython · GitHub

Open Graph Title: gh-141510: Document isinstance change for frozendict in What's New by vstinner · Pull Request #146107 · python/cpython

X Title: gh-141510: Document isinstance change for frozendict in What's New by vstinner · Pull Request #146107 · python/cpython

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Open Graph Description: Issue: PEP 814: Add built-in frozendict type #141510 📚 Documentation preview 📚: https://cpython-previews--146107.org.readthedocs.build/

X Description: Issue: PEP 814: Add built-in frozendict type #141510 📚 Documentation preview 📚: https://cpython-previews--146107.org.readthedocs.build/

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