python runtime_error ai_generated true

SyntaxError: 'await' outside async function

ID: python/asyncio-await-outside-async-function

Also available as: JSON · Markdown · 中文
80%Fix Rate
92%Confidence
0Evidence
2024-01-09First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.8 active — — —
3.9 active — — —
3.10 active — — —
3.11 active — — —
3.12 active — — —

Root Cause

The await keyword was used in a regular def function or at module top level. await is only valid inside async def bodies (or in top-level await when using IPython/Jupyter).

generic

中文

await 关键字被用在普通的 def 函数或模块顶层。await 只能在 async def 函数体内使用（或在 IPython/Jupyter 的顶层 await 中）。

Workarounds

  1. 95% success 
    async def handler():
    data = await fetch()
    return data
  2. 93% success 
    async def main():
    await fetch()
if __name__ == '__main__':
    asyncio.run(main())
  3. 90% success 
    # IPython/Jupyter supports top-level await in cells
await fetch()

Dead Ends

Common approaches that don't work:

  1. 75% fail

    If the sync function is itself called from async code, this raises 'This event loop is already running'.

  2. 95% fail

    Coroutine objects have no result() method; raises AttributeError.