Trio – a friendly Python library for async concurrency and I/O

async async-await io networking python structured-concurrency trio
3 Open Issues Need Help Last updated: Sep 13, 2025

Open Issues Need Help

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AI Summary: The GitHub issue proposes defining the `__bool__` method for `trio.Event` objects to prevent common bugs where users mistakenly check `if event:` instead of `if event.is_set():`. The author's preferred solution is to make `__bool__` raise an error, explicitly guiding users to the correct `is_set()` method, though returning `is_set()` is also considered. This change aims to improve code clarity and reduce user errors, with potential implications for other `trio` synchronization primitives.

Complexity: 3/5
polish good first issue

Trio – a friendly Python library for async concurrency and I/O

Python
#async#async-await#io#networking#python#structured-concurrency#trio

AI Summary: The user requests that `trio.CapacityLimiter` allow `total_tokens` to be set to 0. Currently, passing 0 raises an error, but allowing it would provide a clean way to temporarily pause task processing. A workaround exists, but a direct fix by modifying the setter is preferred.

Complexity: 1/5
polish user happiness good first issue

Trio – a friendly Python library for async concurrency and I/O

Python
#async#async-await#io#networking#python#structured-concurrency#trio

Trio – a friendly Python library for async concurrency and I/O

Python
#async#async-await#io#networking#python#structured-concurrency#trio