@Marvin, how do I pass arbitrary arguments to an on_failure hook? I want to pass the same arguments received by the flow

To pass arbitrary arguments to an

on_failure

hook in Prefect 3.x, you need to define the hook function in such a way that it can accept the necessary arguments. The hook itself can be a function that takes parameters and you can pass the flow's arguments to it. Here's a basic outline of how you might set this up: 1. Define your hook function: Ensure your function can accept the arguments you want to pass.

python
def my_failure_hook(flow_args, **kwargs):
    # Perform some actions using flow_args
    print("Flow failed with arguments:", flow_args)

2. Attach the hook to your flow: When defining your flow, you can specify the

on_failure

hook and pass the necessary arguments.

python
from prefect import flow

@flow(on_failure=[lambda state, flow_args: my_failure_hook(flow_args)])
def my_flow(arg1, arg2):
    # Flow logic here
    pass

In this setup,

my_failure_hook

will be called with the arguments

arg1

and

arg2

when the flow fails. You can replace

flow_args

with the specific arguments you want to pass. For more details on hooks and state management in Prefect, you can refer to the Prefect documentation on managing states.