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🐛 Fix Python3.11+ raises ModuleNotFoundError: No module named typing_extensions #214

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🐛 Fix Python3.11+ raises ModuleNotFoundError: No module named typing_extensions #214

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waketzheng
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How to reproduce:

mkdir temp
cd temp
python3.11 -m venv venv
source venv/*/activate
pip install asyncer
python -c 'import asyncer'

BTW: I changed anyio.sleep(0) to anyio.lowlevel.checkpoint as ruff check --extend-select=ASYNC suggested. And remove the file poetry.toml as no longer need it.

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@tiangolo How to add a label?

@svlandeg svlandeg added the bug Something isn't working label Sep 12, 2024
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Stealthii commented Sep 19, 2024 •
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This bug affects v0.0.8 (the latest version) only.

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This is still a persistent issue for Python 3.11+. This should be merged and released, as any packages using this that support 3.11 have to explicitly block v0.0.8 from dependency mapping.

@svlandeg svlandeg self-assigned this Sep 16, 2025
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github-actions bot commented Oct 1, 2025 •
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📝 Docs preview

Last commit 8affc12 at: https://cc31b8f4.asyncer.pages.dev

svlandeg
svlandeg reviewed Oct 1, 2025
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Hi @waketzheng, thanks for the report and apologies for the late follow-up!

I think this issue has been partly remedied by agronholm/anyio#824 (v4.7.0 released 5 dec 2024) where they explicitely install typing_extensions for Python < 3.13.

Nevertheless, I agree it makes sense to ensure this is internally consistent within asyncer itself as well, and we should only call typing_extensions for those Python versions for which we explicitely install it.

@svlandeg svlandeg removed their assignment Oct 1, 2025
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@svlandeg svlandeg svlandeg approved these changes

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@auvipy auvipy auvipy approved these changes

@JoaoGustavoRogel JoaoGustavoRogel JoaoGustavoRogel approved these changes

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@waketzheng @Stealthii @auvipy @svlandeg @JoaoGustavoRogel