Prefect 2 How to get task parameters in on_failure?

[tonal]

I try get parameters:

from prefect import flow, task
from pprint import pprint

def _log_scrapy_load(task: 'Task', task_run: 'TaskRun', state: 'State'):
  print(f'{task.name} <- {task_run.task_inputs}')

@task(on_failure=[_log_scrapy_load],)
def scrapy_site(feed_prefix:str):
  assert False

@flow
def flow_getsite():
  feed_prefix = f'{SITE_NAME}-'
  scrapy_site.submit(feed_prefix).result()

output:

scrapy_site <- {'feed_prefix': []}

How to get real data from task parameters?

[zanieb]

These are available at prefect.runtime.task_run.parameters

[tonal]

Error output in prefect==2.10.2

Traceback (most recent call last):
   File "/home/tonal/.pyenv/versions/epool-remains_prefect/lib/python3.11/site-packages/prefect/engine.py", line 2078, in _run_task_hooks
    await hook(task=task, task_run=task_run, state=state)
   File "/home/tonal/lang/projects/promsoft/epool/remains_prefect/flows/litkom.py", line 41, in _log_scrapy_load
    print(f'{task.name} <- {task_run.task_inputs} <- {task_run.parameters}')
                                                      ^^^^^^^^^^^^^^^^^^^
 AttributeError: 'TaskRun' object has no attribute 'parameters'

[zanieb]

@tonal that's not the correct task_run — use the one at prefect.runtime.task_run.