Hey everyone! Quick question about hooks and the Kedro context: I'd like to set an environment variable in the instantiation of the Kedro context (in

_setup_env_variables

) and then access these environment variables in the instantiation of my custom Kedro hook, which I have added to

settings.py

with

HOOKS = (CustomHook(),)

It seems like I am getting a KeyError as the wanted environment variables are not yet set when the Hook is instantiated... Is there any way around this? TIA!

Hi @Arnaud Dhaene, could you give a bit more information? • How are you instantiating the

KedroContext

? • How exactly are you setting the environment variables? • What hook specifications are you using?

Hey! I ended up figuring out the following: • Hooks are instantiated before the context is loaded by the session. • This means if your Hook needs environment variables that are set during

session.load_context()

, you will need to access those after initiation (e.g.,

before_pipeline_run

and not in

__init__

Ah yes different hooks are instantiated at different points in the process. Did you find this out through our docs (e.g. https://docs.kedro.org/en/stable/hooks/introduction.html) or by trying stuff yourself? Anything we could do better in making the process clearer?

By trying out stuff myself. It was not super clear to me what happens to hooks after you define

HOOKS = ...

in

settings.py