afrom_names_and_descriptions() — langchain Function Reference

Source Code

libs/langchain/langchain_classic/chains/router/embedding_router.py lines 76–93

    async def afrom_names_and_descriptions(
        cls,
        names_and_descriptions: Sequence[tuple[str, Sequence[str]]],
        vectorstore_cls: type[VectorStore],
        embeddings: Embeddings,
        **kwargs: Any,
    ) -> EmbeddingRouterChain:
        """Convenience constructor."""
        documents = []
        documents.extend(
            [
                Document(page_content=description, metadata={"name": name})
                for name, descriptions in names_and_descriptions
                for description in descriptions
            ]
        )
        vectorstore = await vectorstore_cls.afrom_documents(documents, embeddings)
        return cls(vectorstore=vectorstore, **kwargs)