_call() — langchain Function Reference

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

Function python AgentOrchestration ClassicChains calls 2

Entity Profile

AgentOrchestration→ ClassicChains→ _call() — langchain Function Reference

Dependency Diagram

graph TD
  86361fe0_0a3d_21e9_46de_f77dbc5178a8["_call()"]
  5aa1201d_23fd_f122_acb5_563cb1cc3cb3["BaseQAWithSourcesChain"]
  86361fe0_0a3d_21e9_46de_f77dbc5178a8 -->|defined in| 5aa1201d_23fd_f122_acb5_563cb1cc3cb3
  5e37f7eb_ade8_88a3_3de5_5c960d049bff["_get_docs()"]
  86361fe0_0a3d_21e9_46de_f77dbc5178a8 -->|calls| 5e37f7eb_ade8_88a3_3de5_5c960d049bff
  2c491715_4dce_6ca9_19b4_2181a298e783["_split_sources()"]
  86361fe0_0a3d_21e9_46de_f77dbc5178a8 -->|calls| 2c491715_4dce_6ca9_19b4_2181a298e783
  style 86361fe0_0a3d_21e9_46de_f77dbc5178a8 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/langchain_classic/chains/qa_with_sources/base.py lines 153–179

    def _call(
        self,
        inputs: dict[str, Any],
        run_manager: CallbackManagerForChainRun | None = None,
    ) -> dict[str, str]:
        _run_manager = run_manager or CallbackManagerForChainRun.get_noop_manager()
        accepts_run_manager = (
            "run_manager" in inspect.signature(self._get_docs).parameters
        )
        if accepts_run_manager:
            docs = self._get_docs(inputs, run_manager=_run_manager)
        else:
            docs = self._get_docs(inputs)  # type: ignore[call-arg]

        answer = self.combine_documents_chain.run(
            input_documents=docs,
            callbacks=_run_manager.get_child(),
            **inputs,
        )
        answer, sources = self._split_sources(answer)
        result: dict[str, Any] = {
            self.answer_key: answer,
            self.sources_answer_key: sources,
        }
        if self.return_source_documents:
            result["source_documents"] = docs
        return result