python runtime_error ai_generated true

RuntimeError: Timeout context manager should be used inside a task

ID: python/asyncio-timeout-no-current-event-loop

Also available as: JSON · Markdown · 中文
80%Fix Rate
84%Confidence
0Evidence
2024-08-20First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.11+ active — — —
3.12+ active — — —

Root Cause

asyncio.timeout() (3.11+) or asyncio.wait_for() was used outside a Task context, e.g. directly in loop.run_until_complete() without wrapping in create_task.

generic

中文

asyncio.timeout()（3.11+）或 asyncio.wait_for() 在 Task 上下文之外使用，例如直接在 loop.run_until_complete() 中调用而未用 create_task 包装。

Workarounds

  1. 93% success 
    task = asyncio.create_task(do_work())
try:
    async with asyncio.timeout(5):
        await task
except TimeoutError:
    task.cancel()
  2. 92% success 
    try:
    result = await asyncio.wait_for(do_work(), timeout=5)
except asyncio.TimeoutError:
    ...

Dead Ends

Common approaches that don't work:

  1. 90% fail

    Blocks the loop and defeats async concurrency.

  2. 85% fail

    Debug flag is unrelated; the check is unconditional.