invoke() — langchain Function Reference

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

Function python LangChainCore Runnables called by 1

Entity Profile

LangChainCore→ Runnables→ invoke() — langchain Function Reference

Dependency Diagram

graph TD
  7ef8f2a4_9aa2_9baa_0143_41c8a576c151["invoke()"]
  65b9aaca_53f2_847d_9ab7_024fe53cbbd2["RouterRunnable"]
  7ef8f2a4_9aa2_9baa_0143_41c8a576c151 -->|defined in| 65b9aaca_53f2_847d_9ab7_024fe53cbbd2
  c9737a6d_ee16_ffc7_0ee4_5b2b93274f59["batch()"]
  c9737a6d_ee16_ffc7_0ee4_5b2b93274f59 -->|calls| 7ef8f2a4_9aa2_9baa_0143_41c8a576c151
  style 7ef8f2a4_9aa2_9baa_0143_41c8a576c151 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/runnables/router.py lines 107–117

    def invoke(
        self, input: RouterInput, config: RunnableConfig | None = None, **kwargs: Any
    ) -> Output:
        key = input["key"]
        actual_input = input["input"]
        if key not in self.runnables:
            msg = f"No runnable associated with key '{key}'"
            raise ValueError(msg)

        runnable = self.runnables[key]
        return runnable.invoke(actual_input, config)