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Infer retrieve rerank

InferRetrieveRerankPack #

Bases: BaseLlamaPack

推断检索重排包。

Source code in llama_index/packs/infer_retrieve_rerank/base.py 
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class InferRetrieveRerankPack(BaseLlamaPack):
    """推断检索重排包。"""

    def __init__(
        self,
        labels: List[str],
        llm: Optional[LLM] = None,
        pred_context: str = "",
        reranker_top_n: int = 3,
        infer_prompt: Optional[PromptTemplate] = None,
        rerank_prompt: Optional[PromptTemplate] = None,
        verbose: bool = False,
    ) -> None:
        """初始化参数。"""
        # NOTE: we use 16k model by default to fit longer contexts
        self.llm = llm or OpenAI(model="gpt-3.5-turbo-16k")
        label_nodes = [TextNode(text=label) for label in labels]
        pipeline = IngestionPipeline(transformations=[OpenAIEmbedding()])
        label_nodes_w_embed = pipeline.run(documents=label_nodes)

        index = VectorStoreIndex(label_nodes_w_embed, show_progress=verbose)
        self.label_retriever = index.as_retriever(similarity_top_k=2)
        self.pred_context = pred_context
        self.reranker_top_n = reranker_top_n
        self.verbose = verbose

        self.infer_prompt = infer_prompt or INFER_PROMPT_TMPL
        self.rerank_prompt = rerank_prompt or RERANK_PROMPT_TMPL

    def get_modules(self) -> Dict[str, Any]:
        """获取模块。"""
        return {
            "llm": self.llm,
            "label_retriever": self.label_retriever,
        }

    def run(self, *args: Any, **kwargs: Any) -> Any:
        """运行流水线。"""
        inputs = kwargs.get("inputs", [])
        pred_reactions = []
        for idx, input in enumerate(inputs):
            if self.verbose:
                print(f"\n\n> Generating predictions for input {idx}: {input[:300]}")
            cur_pred_reactions = infer_retrieve_rerank(
                input,
                self.label_retriever,
                self.llm,
                self.pred_context,
                self.infer_prompt,
                self.rerank_prompt,
                reranker_top_n=self.reranker_top_n,
            )
            if self.verbose:
                print(f"> Generated predictions: {cur_pred_reactions}")

            pred_reactions.append(cur_pred_reactions)

        return pred_reactions

get_modules #

get_modules() -> Dict[str, Any]

获取模块。

Source code in llama_index/packs/infer_retrieve_rerank/base.py 
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def get_modules(self) -> Dict[str, Any]:
    """获取模块。"""
    return {
        "llm": self.llm,
        "label_retriever": self.label_retriever,
    }

run #

run(*args: Any, **kwargs: Any) -> Any

运行流水线。

Source code in llama_index/packs/infer_retrieve_rerank/base.py 
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def run(self, *args: Any, **kwargs: Any) -> Any:
    """运行流水线。"""
    inputs = kwargs.get("inputs", [])
    pred_reactions = []
    for idx, input in enumerate(inputs):
        if self.verbose:
            print(f"\n\n> Generating predictions for input {idx}: {input[:300]}")
        cur_pred_reactions = infer_retrieve_rerank(
            input,
            self.label_retriever,
            self.llm,
            self.pred_context,
            self.infer_prompt,
            self.rerank_prompt,
            reranker_top_n=self.reranker_top_n,
        )
        if self.verbose:
            print(f"> Generated predictions: {cur_pred_reactions}")

        pred_reactions.append(cur_pred_reactions)

    return pred_reactions