How to instantiate a node from a config (yaml or dict)?

[danielfleischer]

In v1 we used BaseComponent._create_instance(...). What is the minimal example of initializing a node with config dict(type=X, arg1=..., argN=...) ?

[vblagoje]

Hey @danielfleischer would you please clarify - are you asking how is it done in Haystack 2?

[danielfleischer]

I'm asking how can a user instantiate a single node from some configuration, in v2.

[vblagoje]

Users normally don't need to do this on a component level, (de)serialization mechanism does this automatically for you on pipeline level. See https://haystack.deepset.ai/tutorials/29_serializing_pipelines if helps out. If not lmk

[danielfleischer]

Hi, as a developer, I want to create and debug individual components.

So based on the link it looks like component_from_dict + some code to extract the cls is all I need. Thanks!