python

Pydantic v2 validation error

pydantic_core\._pydantic_core\.ValidationError

Fixes

1.Check field types match the input data
2.Use model_validate() instead of direct constructor for dict input
3.Add field validators with @field_validator for custom logic

pydanticvalidation

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