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    Home»AI News»Build a Complete Langfuse Observability and Evaluation Pipeline for Tracing, Prompt Management, Scoring, and Experiments
    Build a Complete Langfuse Observability and Evaluation Pipeline for Tracing, Prompt Management, Scoring, and Experiments
    AI News

    Build a Complete Langfuse Observability and Evaluation Pipeline for Tracing, Prompt Management, Scoring, and Experiments

    May 25, 20262 Mins Read
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    murf

    rewrite this content and keep HTML tags as is. This is content from rss feed and I don’t need their *Daily Debrief Newsletter*, their tags from bottom like this *Share this articleCategoriesTags*, Editorial Process section, phrases like *Featured image from Peakpx, chart from Tradingview.com*, SPECIAL OFFERS and similar sections – just remove such sections and save only article itself:

    print(“\nPART 5 ── Datasets & experiments ————————————–“)
    DATASET = “capital-cities-tutorial”
    langfuse.create_dataset(name=DATASET, description=”Capital-city QA benchmark”)
    _items = [
    (“What is the capital of France?”, “Paris”),
    (“What is the capital of Germany?”, “Berlin”),
    (“What is the capital of Japan?”, “Tokyo”),
    (“What is the capital of Italy?”, “Rome”),
    ]
    for i, (q, a) in enumerate(_items):
    langfuse.create_dataset_item(dataset_name=DATASET, id=f”cap-{i}”,
    input={“question”: q}, expected_output=a)
    def capital_task(*, item, **kwargs):
    question = item.input[“question”] if isinstance(item.input, dict) else item.input
    return llm_chat([{“role”: “user”, “content”: question}], name=”experiment-answer”)
    def accuracy(*, input, output, expected_output, metadata=None, **kwargs):
    hit = bool(expected_output) and expected_output.lower() in (output or “”).lower()
    return Evaluation(name=”accuracy”, value=1.0 if hit else 0.0,
    comment=”exact-match contains check”)
    def conciseness(*, input, output, **kwargs):
    return Evaluation(name=”char_length”, value=float(len(output or “”)))
    def mean_accuracy(*, item_results, **kwargs):
    vals = [e.value for r in item_results for e in r.evaluations if e.name == “accuracy”]
    avg = sum(vals) / len(vals) if vals else 0.0
    return Evaluation(name=”mean_accuracy”, value=avg, comment=f”{avg:.0%} correct”)
    dataset = langfuse.get_dataset(DATASET)
    result = dataset.run_experiment(
    name=”capitals-baseline”,
    description=”Baseline run from the Colab tutorial”,
    task=capital_task,
    evaluators=[accuracy, conciseness],
    run_evaluators=[mean_accuracy],
    max_concurrency=4,
    )
    print(result.format())
    changelly
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