_call() — langchain Function Reference

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

Function python AgentOrchestration ClassicChains calls 2 called by 1

Entity Profile

AgentOrchestration→ ClassicChains→ _call() — langchain Function Reference

Dependency Diagram

graph TD
  971650f7_5caa_f9b1_7442_8ddd96c90943["_call()"]
  2f364d76_a69d_403d_0a63_04792fe626bb["BaseCombineDocumentsChain"]
  971650f7_5caa_f9b1_7442_8ddd96c90943 -->|defined in| 2f364d76_a69d_403d_0a63_04792fe626bb
  2935460b_bf17_a686_f1f0_6e58ef3057d8["_call()"]
  2935460b_bf17_a686_f1f0_6e58ef3057d8 -->|calls| 971650f7_5caa_f9b1_7442_8ddd96c90943
  3202613a_f900_a68d_c95f_de1c5e9326d8["combine_docs()"]
  971650f7_5caa_f9b1_7442_8ddd96c90943 -->|calls| 3202613a_f900_a68d_c95f_de1c5e9326d8
  2935460b_bf17_a686_f1f0_6e58ef3057d8["_call()"]
  971650f7_5caa_f9b1_7442_8ddd96c90943 -->|calls| 2935460b_bf17_a686_f1f0_6e58ef3057d8
  style 971650f7_5caa_f9b1_7442_8ddd96c90943 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/langchain_classic/chains/combine_documents/base.py lines 131–147

    def _call(
        self,
        inputs: dict[str, list[Document]],
        run_manager: CallbackManagerForChainRun | None = None,
    ) -> dict[str, str]:
        """Prepare inputs, call combine docs, prepare outputs."""
        _run_manager = run_manager or CallbackManagerForChainRun.get_noop_manager()
        docs = inputs[self.input_key]
        # Other keys are assumed to be needed for LLM prediction
        other_keys = {k: v for k, v in inputs.items() if k != self.input_key}
        output, extra_return_dict = self.combine_docs(
            docs,
            callbacks=_run_manager.get_child(),
            **other_keys,
        )
        extra_return_dict[self.output_key] = output
        return extra_return_dict