Method from_llm

libs/langchain/langchain/chains/flare/base.py:240–270

Creates a FlareChain from a language model. Args: llm: Language model to use. max_generation_len: Maximum length of the generated response. **kwargs: Additional arguments to pass to the constructor. Returns: FlareChain class with the

(
        cls, llm: BaseLanguageModel, max_generation_len: int = 32, **kwargs: Any
    )

    @classmethod
    def from_llm(
        cls, llm: BaseLanguageModel, max_generation_len: int = 32, **kwargs: Any
    ) -> FlareChain:
        """Creates a FlareChain from a language model.

        Args:
            llm: Language model to use.
            max_generation_len: Maximum length of the generated response.
            **kwargs: Additional arguments to pass to the constructor.

        Returns:
            FlareChain class with the given language model.
        """
        try:
            from langchain_openai import OpenAI
        except ImportError:
            raise ImportError(
                "OpenAI is required for FlareChain. "
                "Please install langchain-openai."
                "pip install langchain-openai"
            )
        question_gen_chain = QuestionGeneratorChain(llm=llm)
        response_llm = OpenAI(
            max_tokens=max_generation_len, model_kwargs={"logprobs": 1}, temperature=0
        )
        response_chain = _OpenAIResponseChain(llm=response_llm)
        return cls(
            question_generator_chain=question_gen_chain,
            response_chain=response_chain,
            **kwargs,
        )