[R-224] Ragas integration with Langfuse to trace both llm outputs and scores in the same place

[databill86]

[x ] I checked the documentation and related resources and couldn't find an answer to my question.
I checked and tested the integration of ragas with Langfuse as demonstrated here. Although a lot of the code in that page did not work, I used the evaluate function to get the scores, and I logged all the scores in Langfuse.

My Question: how to customize llm traces with ragas

Is there any way we can log the llm generations when evaluating the results using some given trace_ids ?
I already have the generations logged into langfuse, but the problem is I want to log these generations into some other corresponding trace_ids I already generated.
Is this possible ?

Code Examples

        score = evaluate(
            dataset,
            metrics=[
                context_precision,
                context_recall,
                context_relevancy,
            ],
            llm=llm_ragas,
            embeddings=embedding_model_ragas,
        )

       # at this point, the traces of all the llm generations done by ragas are already logged into langfuse. 
       # is there a way we can log them using some given trace ids ? 
        ....
        for k, v in score_row.items():
            try:
                if v not math.isnan(v):
                    langfuse.score(trace_id=trace_id, name=k, value=v)
                else:
                    logger.error(f"Score {k} is None")
            except Exception as e:
                logger.error(f"Error logging score: {e}")
....

I believe these issues are related: #896, #893

Additional context
Here are the requirements used.

langfuse==2.26.3
litellm==1.35.12
ragas==0.1.7

_R-224

[jjmachan]

Hey @databill86 thanks for raising this - will be fixing these issues shortly and doing a release with the fixes for you 🙂

cheers