on_custom_event() — langchain Function Reference

Architecture documentation for the on_custom_event() function in test_dispatch_custom_event.py from the langchain codebase.

Function python LangChainCore ApiManagement calls 1 called by 2

Entity Profile

LangChainCore→ ApiManagement→ on_custom_event() — langchain Function Reference

Dependency Diagram

graph TD
  69abfcaa_2265_6f22_e92f_293002c66609["on_custom_event()"]
  1e393b85_445b_2577_7e40_007160e15d28["CustomCallbackManager"]
  69abfcaa_2265_6f22_e92f_293002c66609 -->|defined in| 1e393b85_445b_2577_7e40_007160e15d28
  a755f762_be6b_b572_cf25_0a2f3e072485["on_custom_event()"]
  a755f762_be6b_b572_cf25_0a2f3e072485 -->|calls| 69abfcaa_2265_6f22_e92f_293002c66609
  f635742f_77dd_1440_f710_a31d4d73059c["test_sync_callback_manager()"]
  f635742f_77dd_1440_f710_a31d4d73059c -->|calls| 69abfcaa_2265_6f22_e92f_293002c66609
  a755f762_be6b_b572_cf25_0a2f3e072485["on_custom_event()"]
  69abfcaa_2265_6f22_e92f_293002c66609 -->|calls| a755f762_be6b_b572_cf25_0a2f3e072485
  style 69abfcaa_2265_6f22_e92f_293002c66609 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/callbacks/test_dispatch_custom_event.py lines 121–140

        def on_custom_event(
            self,
            name: str,
            data: Any,
            *,
            run_id: UUID,
            tags: list[str] | None = None,
            metadata: dict[str, Any] | None = None,
            **kwargs: Any,
        ) -> None:
            assert kwargs == {}
            self.events.append(
                (
                    name,
                    data,
                    run_id,
                    tags,
                    metadata,
                )
            )