from_chain_type() — langchain Function Reference

Architecture documentation for the from_chain_type() function in base.py from the langchain codebase.

Function python AgentOrchestration ClassicChains

Entity Profile

AgentOrchestration→ ClassicChains→ from_chain_type() — langchain Function Reference

Dependency Diagram

graph TD
  65518b35_6c82_cb7b_5747_f216b40fd9f0["from_chain_type()"]
  1cb458d9_f8c6_d78d_c1e3_79a8b3106c08["BaseRetrievalQA"]
  65518b35_6c82_cb7b_5747_f216b40fd9f0 -->|defined in| 1cb458d9_f8c6_d78d_c1e3_79a8b3106c08
  style 65518b35_6c82_cb7b_5747_f216b40fd9f0 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/langchain_classic/chains/retrieval_qa/base.py lines 104–118

    def from_chain_type(
        cls,
        llm: BaseLanguageModel,
        chain_type: str = "stuff",
        chain_type_kwargs: dict | None = None,
        **kwargs: Any,
    ) -> BaseRetrievalQA:
        """Load chain from chain type."""
        _chain_type_kwargs = chain_type_kwargs or {}
        combine_documents_chain = load_qa_chain(
            llm,
            chain_type=chain_type,
            **_chain_type_kwargs,
        )
        return cls(combine_documents_chain=combine_documents_chain, **kwargs)