python

SQLAlchemy query returned no results

sqlalchemy\.exc\.NoResultFound

Fixes

1.Use .first() instead of .one() if zero results is acceptable
2.Use .one_or_none() to get None instead of an exception
3.Add existence check before calling .one()

sqlalchemyquery

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