invoke() — langchain Function Reference

Architecture documentation for the invoke() function in chat_models.py from the langchain codebase.

Function python LangChainCore LanguageModelBase calls 2 called by 2

Entity Profile

LangChainCore→ LanguageModelBase→ invoke() — langchain Function Reference

Dependency Diagram

graph TD
  f961f0c9_5051_8b77_5e6c_256782a5be2a["invoke()"]
  48aa29b8_65e7_522f_a445_a441eeb6baff["BaseChatModel"]
  f961f0c9_5051_8b77_5e6c_256782a5be2a -->|defined in| 48aa29b8_65e7_522f_a445_a441eeb6baff
  2c835c4d_6d4b_1dc6_028c_27710e69a32a["stream()"]
  2c835c4d_6d4b_1dc6_028c_27710e69a32a -->|calls| f961f0c9_5051_8b77_5e6c_256782a5be2a
  a7b3568d_42f9_a0cb_ee98_bd7da412e7e8["with_structured_output()"]
  a7b3568d_42f9_a0cb_ee98_bd7da412e7e8 -->|calls| f961f0c9_5051_8b77_5e6c_256782a5be2a
  95588b98_6ef2_2032_685f_e8b8a20fe91c["generate_prompt()"]
  f961f0c9_5051_8b77_5e6c_256782a5be2a -->|calls| 95588b98_6ef2_2032_685f_e8b8a20fe91c
  494835ff_15be_f036_50fa_f8855bc47703["_convert_input()"]
  f961f0c9_5051_8b77_5e6c_256782a5be2a -->|calls| 494835ff_15be_f036_50fa_f8855bc47703
  style f961f0c9_5051_8b77_5e6c_256782a5be2a fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/language_models/chat_models.py lines 389–413

    def invoke(
        self,
        input: LanguageModelInput,
        config: RunnableConfig | None = None,
        *,
        stop: list[str] | None = None,
        **kwargs: Any,
    ) -> AIMessage:
        config = ensure_config(config)
        return cast(
            "AIMessage",
            cast(
                "ChatGeneration",
                self.generate_prompt(
                    [self._convert_input(input)],
                    stop=stop,
                    callbacks=config.get("callbacks"),
                    tags=config.get("tags"),
                    metadata=config.get("metadata"),
                    run_name=config.get("run_name"),
                    run_id=config.pop("run_id", None),
                    **kwargs,
                ).generations[0][0],
            ).message,
        )