a question on hooks: hooks can be used to modify a parameter in the catalog? if I look at the signature of hook:

def after_catalog_created(self, catalog: DataCatalog) -> None:

it seems to me there is no way to make some change in the catalog, correct (I can load the parameter but I do not see a way to make a change). This might very well be on purpose (where hooks are only for logging and profiling). My use case (just so I do not follow in the XY problem trap https://en.wikipedia.org/wiki/XY_problem) is that I have a parameter where a default value should be computed starting from the value of another parameter (and this parameter is used in many nodes and I would like not to need to call the change everytime)

Someone will reply to you shortly. In the meantime, this might help:

Is this right:

param1

is what is set manually in

parameters.yml

, and

param2

is calculated from

param1

? Maybe you could have a node that does

calculation(param1) -> param2

.

param2

could be just a

MemoryDataset

that is passed to downstream nodes.

Resolvers might also be helpful - https://docs.kedro.org/en/stable/configuration/advanced_configuration.html#how-to-use-resolvers-in-the-omegaconfigloader Please have a look at this. Thank you

Thanks for both answers, using a node or resolvers are both valid options for my use case