init() — langchain Function Reference

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

Function python Observability Tracers calls 1

Entity Profile

Observability→ Tracers→ __init__() — langchain Function Reference

Dependency Diagram

graph TD
  c3dd086b_6fc4_e4d4_0636_f433544cc90a["__init__()"]
  178590bb_85ff_b79e_979a_46e5c3c5389f["LangChainTracer"]
  c3dd086b_6fc4_e4d4_0636_f433544cc90a -->|defined in| 178590bb_85ff_b79e_979a_46e5c3c5389f
  5bc3a21d_e5fd_fdaa_5945_0f790b4d94b2["get_client()"]
  c3dd086b_6fc4_e4d4_0636_f433544cc90a -->|calls| 5bc3a21d_e5fd_fdaa_5945_0f790b4d94b2
  style c3dd086b_6fc4_e4d4_0636_f433544cc90a fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/tracers/langchain.py lines 104–135

    def __init__(
        self,
        example_id: UUID | str | None = None,
        project_name: str | None = None,
        client: Client | None = None,
        tags: list[str] | None = None,
        **kwargs: Any,
    ) -> None:
        """Initialize the LangChain tracer.

        Args:
            example_id: The example ID.
            project_name: The project name.

                Defaults to the tracer project.
            client: The client.

                Defaults to the global client.
            tags: The tags.

                Defaults to an empty list.
            **kwargs: Additional keyword arguments.
        """
        super().__init__(**kwargs)
        self.example_id = (
            UUID(example_id) if isinstance(example_id, str) else example_id
        )
        self.project_name = project_name or ls_utils.get_tracer_project()
        self.client = client or get_client()
        self.tags = tags or []
        self.latest_run: Run | None = None
        self.run_has_token_event_map: dict[str, bool] = {}