Method invoke

libs/core/langchain_core/runnables/base.py:2479–2512

(
        self, input: Input, config: Optional[RunnableConfig] = None, **kwargs: Any
    )

            )

    def invoke(
        self, input: Input, config: Optional[RunnableConfig] = None, **kwargs: Any
    ) -> Output:
        from langchain_core.beta.runnables.context import config_with_context

        # setup callbacks and context
        config = config_with_context(ensure_config(config), self.steps)
        callback_manager = get_callback_manager_for_config(config)
        # start the root run
        run_manager = callback_manager.on_chain_start(
            dumpd(self),
            input,
            name=config.get("run_name") or self.get_name(),
            run_id=config.pop("run_id", None),
        )

        # invoke all steps in sequence
        try:
            for i, step in enumerate(self.steps):
                # mark each step as a child run
                config = patch_config(
                    config, callbacks=run_manager.get_child(f"seq:step:{i+1}")
                )
                if i == 0:
                    input = step.invoke(input, config, **kwargs)
                else:
                    input = step.invoke(input, config)
        # finish the root run
        except BaseException as e:
            run_manager.on_chain_error(e)
            raise
        else:
            run_manager.on_chain_end(input)
            return cast(Output, input)

    async def ainvoke(
        self,