langchain_core.tracers.context.tracing_v2_enabled

langchain_core.tracers.context.tracing_v2_enabled(project_name: Optional[str] = None, *, example_id: Optional[Union[str, UUID]] = None, tags: Optional[List[str]] = None, client: Optional[LangSmithClient] = None) → Generator[LangChainTracer, None, None]

Instruct LangChain to log all runs in context to LangSmith.

Parameters

• project_name (str, optional) – The name of the project. Defaults to “default”.

• example_id (str or UUID, optional) – The ID of the example. Defaults to None.

• tags (List[str], optional) – The tags to add to the run. Defaults to None.

• client (LangSmithClient, optional) – The client of the langsmith. Defaults to None.

Returns

None

Example

>>> with tracing_v2_enabled():
...     # LangChain code will automatically be traced

You can use this to fetch the LangSmith run URL:

>>> with tracing_v2_enabled() as cb:
...     chain.invoke("foo")
...     run_url = cb.get_run_url()

Examples using tracing_v2_enabled

• LangSmith Walkthrough