_on_chat_model_start() — langchain Function Reference

Architecture documentation for the _on_chat_model_start() function in core.py from the langchain codebase.

Function python Observability Tracers

Entity Profile

Observability→ Tracers→ _on_chat_model_start() — langchain Function Reference

Dependency Diagram

graph TD
  63e1ffcb_0004_81bf_1941_0fe5f6766bfe["_on_chat_model_start()"]
  70348e44_de0f_ccb4_c06a_8453289ed93e["_TracerCore"]
  63e1ffcb_0004_81bf_1941_0fe5f6766bfe -->|defined in| 70348e44_de0f_ccb4_c06a_8453289ed93e
  style 63e1ffcb_0004_81bf_1941_0fe5f6766bfe fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/tracers/core.py lines 671–678

    def _on_chat_model_start(self, run: Run) -> Coroutine[Any, Any, None] | None:
        """Process the Chat Model Run upon start.

        Args:
            run: The chat model run.
        """
        _ = run
        return None