python

FastAPI dependency injection resolution failure

DependencyInjection.*Depends\(\).*cannot be resolved

Fixes

1.Ensure dependency function signature matches expected parameters
2.Check that sub-dependencies are properly defined
3.Use Annotated[Type, Depends(func)] syntax for clearer DI

fastapidependency-injection

Related Errors

Asyncio event loop already running

RuntimeError: This event loop is already running

•Use nest_asyncio.apply() to allow nested event loops
•Use asyncio.run_coroutine_threadsafe() instead of asyncio.run()

Coroutine never awaited

RuntimeWarning: coroutine '.*' was never awaited

•Add 'await' before the coroutine call
•Use asyncio.create_task() to schedule the coroutine

Asyncio task was cancelled

asyncio\.CancelledError

•Handle CancelledError in try/except within the task
•Use asyncio.shield() to protect critical sections from cancellation