Bump minimum Python to 3.13 and modernize - #198
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Raise the minimum supported Python version to 3.13 and apply the modernizations that unlocks: - pyproject.toml: requires-python >=3.13; ty environment python-version 3.13 - CI: drop the 3.9-3.12 test matrix rows, keep 3.13 and 3.14 - README/docs: update the advertised minimum version Source: - Adopt PEP 695 type-parameter syntax for the generic Proxy/Watcher classes, the computed/watch helpers and the Watchable/WatchCallback aliases, dropping the module-level TypeVar and typing.Generic bases - init.py: drop the getattr guard around asyncio.eager_task_factory, which now always exists - watcher.py: import TypeIs from typing (added in 3.13) instead of typing_extensions Tests: - Remove sys.version_info / hasattr(asyncio, "eager_task_factory") guards that are now always true - Exclude __type_params__ (added by the native PEP 695 generic) from the wrapping-completeness check Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XGH6yjPx1mpY134qtk6rXa
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Summary
Raise the minimum supported Python version to 3.13 and apply the modernizations that unlocks across the package, tests, CI and docs.
Version bump
pyproject.toml:requires-python = ">=3.13", and thetyenvironmentpython-versionbumped to3.13(so the type checker keeps matching the oldest supported version).3.9–3.12rows from the test matrix, keeping3.13and3.14.Source modernization (unlocked by requiring ≥ 3.12/3.13)
ProxyandWatchernow use the native type-parameter syntax (class Proxy[T]:), as doproxy/ref/readonly/computed/watch/watch_effect/to_rawand theWatchable/WatchCallbacktype aliases. This removes the module-levelTypeVarand thetyping.Genericbases. Runtime behaviour is unchanged.asyncio.eager_task_factory:loop_factory()drops thegetattrguard — the attribute always exists now.TypeIs: imported fromtyping(added in 3.13) instead oftyping_extensions.RefTypedDictno longer needs its "requires 3.11" note.Test cleanup
sys.version_info/hasattr(asyncio, "eager_task_factory")guards that are now always true (test_init.py,test_asyncio.py).__type_params__(added by the native PEP 695 generic) from the wrapping-completeness check intest_collections.py, alongside the existingGenericartifacts.Validation
On Python 3.13, all of the following pass locally:
ruff check .andruff format --check .ty checkpytest tests— 218 passed, 1 xfaileduv build+twine checkon the resulting wheel/sdist🤖 Generated with Claude Code
https://claude.ai/code/session_01XGH6yjPx1mpY134qtk6rXa
Generated by Claude Code