on_retriever_start

on_retriever_start(
  self,
  serialized: dict[str, Any],
  query: str,
  *,

Parameters

Name	Type	Description
`serialized`*	`dict[str, Any]`	Serialized retriever descriptor with `name` and `description`.
`query`*	`str`	The retriever query string.
`run_id`*	`UUID`	Unique identifier for this retriever run.
`parent_run_id`	`Optional[UUID]`	Default:`None`
`metadata`	`Optional[dict[str, Any]]`	Default:`None`
`**kwargs`	`Any`	Default:`{}`