Dynamically change langsmith project (LANGCHAIN_PROJECT value)

tux_tina

I have a graph that I use in 2 places in my API. (note that the graph has many nodes and edges) as an independent graph exposed through /my-api1 as a subgraph, exposed through /my-api2 problem is, when calling through my-api1 i want to log to LangSmith project1 and when calling through my-api2 I want to log to LangSmith project2. i cannot apply @traceable decorator because the same methods/nodes are used in 2 places. is there another way to...

Originally asked by Mohamed ATia on Stack Exchange (stackoverflow) (CC BY-SA 4.0).

uphilltech

Great question — answering as the UphillTech team:

The only way I was able to do that was doing this: from langsmith import Client from langchain_core.tracers import LangChainTracer def invoke_with_project(project_name: str, prompt: str): client = Client() tracer = LangChainTracer(project_name=project_name, client=client) llm = ChatOpenAI( model='gpt-3.5-turbo', temperature=0.0, ) answer = llm.invoke( prompt, config={"callbacks": [tracer]} ) return answer answer1 = invoke_with_project("project_x", "Tell me a story about a robot learning to dance.") answer2 = invoke_with_project("project_y", "Tell me a story about a robot learning to code.") I'm not sure if this is the most recommended or updated way to deal with this, but it worked...

Full answer by Nats: https://stackoverflow.stackexchange.com/a/79852876 (CC BY-SA 4.0).

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