Dynamically link arguments in LightningCLI?

[EthanMarx]

Description & Motivation

Is it possible to dynamically link arguments in the LightningCLI, say, depending on the module or datamodule subclass that is specified in a config file or at the command line?

Pitch

No response

Alternatives

No response

Additional context

No response

cc @Borda @carmocca @mauvilsa

[mauvilsa]

Maybe more details are needed, since dynamically is a rather general term. Some dynamic linking that already work:

• When the target of a link is a parameter in a subclass, the link is only applied if the selected subclass have such parameter, otherwise the link is ignored.
• A link can have as source an entire subclass block. And links can have a compute_fn, see link_arguments. Thus, it is possible to implement a compute_fn that depending on the selected subclass returns particular values, which would then be set to the target.

[EthanMarx]

Ah. That first point is what I'm looking for! Thanks for the clarification!