call() — langchain Function Reference

Architecture documentation for the __call__() function in types.py from the langchain codebase.

Function python CoreAbstractions MessageSchema

Entity Profile

CoreAbstractions→ MessageSchema→ __call__() — langchain Function Reference

Dependency Diagram

graph TD
  fb58433f_1e99_07b0_add6_8bb37abc008b["__call__()"]
  8b23fd0a_c258_6911_8c91_4516b6f509be["_CallableReturningModelResponse"]
  fb58433f_1e99_07b0_add6_8bb37abc008b -->|defined in| 8b23fd0a_c258_6911_8c91_4516b6f509be
  style fb58433f_1e99_07b0_add6_8bb37abc008b fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain_v1/langchain/agents/middleware/types.py lines 828–834

    def __call__(
        self,
        request: ModelRequest[ContextT],
        handler: Callable[[ModelRequest[ContextT]], ModelResponse[ResponseT]],
    ) -> ModelResponse[ResponseT] | AIMessage:
        """Intercept model execution via handler callback."""
        ...