_call_with_config() — langchain Function Reference

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

Function python LangChainCore Runnables calls 1 called by 2

Entity Profile

LangChainCore→ Runnables→ _call_with_config() — langchain Function Reference

Dependency Diagram

graph TD
  424a7613_4cfe_67c7_0e4e_df9c17b111eb["_call_with_config()"]
  4a62481c_02cb_a5de_1833_50669d5351a6["Runnable"]
  424a7613_4cfe_67c7_0e4e_df9c17b111eb -->|defined in| 4a62481c_02cb_a5de_1833_50669d5351a6
  85609be6_cbc7_0689_ac1a_dce4dde514b5["invoke()"]
  85609be6_cbc7_0689_ac1a_dce4dde514b5 -->|calls| 424a7613_4cfe_67c7_0e4e_df9c17b111eb
  6c985726_494e_e996_1fc3_70630ec9ef85["invoke()"]
  6c985726_494e_e996_1fc3_70630ec9ef85 -->|calls| 424a7613_4cfe_67c7_0e4e_df9c17b111eb
  255c479b_b9fa_44d8_4de5_2562051e06b5["get_name()"]
  424a7613_4cfe_67c7_0e4e_df9c17b111eb -->|calls| 255c479b_b9fa_44d8_4de5_2562051e06b5
  style 424a7613_4cfe_67c7_0e4e_df9c17b111eb fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/runnables/base.py lines 2027–2074

    def _call_with_config(
        self,
        func: Callable[[Input], Output]
        | Callable[[Input, CallbackManagerForChainRun], Output]
        | Callable[[Input, CallbackManagerForChainRun, RunnableConfig], Output],
        input_: Input,
        config: RunnableConfig | None,
        run_type: str | None = None,
        serialized: dict[str, Any] | None = None,
        **kwargs: Any | None,
    ) -> Output:
        """Call with config.

        Helper method to transform an `Input` value to an `Output` value,
        with callbacks.

        Use this method to implement `invoke` in subclasses.

        """
        config = ensure_config(config)
        callback_manager = get_callback_manager_for_config(config)
        run_manager = callback_manager.on_chain_start(
            serialized,
            input_,
            run_type=run_type,
            name=config.get("run_name") or self.get_name(),
            run_id=config.pop("run_id", None),
        )
        try:
            child_config = patch_config(config, callbacks=run_manager.get_child())
            with set_config_context(child_config) as context:
                output = cast(
                    "Output",
                    context.run(
                        call_func_with_variable_args,  # type: ignore[arg-type]
                        func,
                        input_,
                        config,
                        run_manager,
                        **kwargs,
                    ),
                )
        except BaseException as e:
            run_manager.on_chain_error(e)
            raise
        else:
            run_manager.on_chain_end(output)
            return output