lenskit.pipeline.ComponentInputHook

class lenskit.pipeline.ComponentInputHook

Bases: Protocol

Inspect or process data as it passes to a component’s input.

As with all Pipeline Hooks, an input hook is a callable that is run at the appropriate stage of the input.

Component input hooks are installed under the name component-input.

Stability:

Experimental

__call__(node, input, value, **context)

Inspect or process the component input data.

Parameters:

• node (lenskit.pipeline.nodes.ComponentInstanceNode[Any]) – The component node being invoked.

• input (lenskit.pipeline.components.ComponentInput) – The component input that will receive the data.

• value (object) – The data value to be supplied. This is declared object, because its type is not known or guaranteed in the genral case.

• context (Any) – Additional context variables, mostly for the use of internal hooks.

Returns:

The value to pass to the component. For inspection-only hooks, this will just be value; hooks can also substitute alternative values depending on application needs.

Return type:

Any