Pip langfuse g. Nov 7, 2024 · LangSmithとLangfuseのプランを比較してみると、それぞれのサービスの特徴が見えてきますね。 LangSmithは公式ライブラリということもあって、信頼性やサポート体制がしっかりしている印象です。 Mar 20, 2024 · 该集成是 OpenAI Python SDK 的直接替代品。通过更改导入，Langfuse 将捕获所有 LLM 调用并将它们异步发送到 Langfuse。 安装依赖. % pip install opentelemetry-sdk opentelemetry-exporter-otlp opentelemetry-api. In the Langfuse UI, you can filter Traces by Scores and look into the details for each. View Trace in Langfuse. . Done! You see traces of your index and query in your Langfuse project. pip install langfuse. Via the Langfuse @observe() decorator we can automatically capture execution details of any python function such as inputs, outputs, timings, and more. 使用方法. See Scores in Langfuse. Aug 14, 2024 · pip install llm-guard langfuse openai from llm_guard. LangFuse Cloud Site Access Jul 27, 2023 · About Langfuse. Structured Output. Interfaces: @observe() decorator ; Low-level tracing SDK ; Wrapper of Langfuse public API 🪢 Langfuse Python SDK - Instrument your LLM app with decorators or low-level SDK and get detailed tracing/observability. Get in touch. Name that identifies the prompt in Langfuse Prompt Management This guide shows how to natively integrate Langfuse with LangChain's Langserve for observability, metrics, evals, prompt management, playground, datasets. 前面我们介绍了 LangChain 无缝衔接的 LangSmith 平台，可以跟踪程序运行步骤，提供详细调试信息，同时支持数据集收集和自动化测试评估等功能，极大方便了AI大模型应用程序的开发过程。 Jul 27, 2023 · About Langfuse. We use Langfuse datasets, to store a list of example inputs and expected outputs. By the end of this guide, you will be able to trace your smolagents applications with Langfuse. openai import openai # OpenAI integration from langfuse. What is Instructor? Instructor is a popular library to get structured LLM outputs. pip install langfuse Langchain. Apr 15, 2025 · Langfuse Python SDK. Go to https://cloud. It supports both synchronous and asynchronous functions, automatically handling traces, spans, and generations, along with key execution details like inputs and outputs. The Langfuse OpenAI SDK wrapper automatically captures token counts, latencies, streaming response times (time to first token), API errors, and more. decorators import observe, langfuse_context from llm_guard. Langfuse is an open source product analytics platform for LLM applications. Observe the Request with Langfuse. Langfuse SDKs. Jan 10, 2025 · Example trace in Langfuse. Example traces (public links): Query; Query (chat) Session; Trace in Langfuse: Interested in more advanced features? See the full integration docs to learn more about advanced features and how to use them: Interoperability with Langfuse Python SDK and other integrations Jun 3, 2024 · LangFuse 为大型语言模型的维护和管理提供了一站式解决方案，帮助用户在生产环境中高效、安全地部署和优化语言模型。通过其强大的功能和灵活的架构，LangFuse 能够满足不同应用场景的需求，为用户带来更加便捷和可靠的模型管理体验。 Observability & Tracing for Langchain (Python & JS/TS) Langfuse Tracing integrates with Langchain using Langchain Callbacks (Python, JS). decorators import langfuse_context, observe # Create a trace via Langfuse decorators and get a Langchain Callback handler for it @observe # automtically log function as a trace to Langfuse def main (): # update trace attributes (e. Integrate Langfuse Tracing into your LLM applications with the Langfuse Python SDK using the @observe() decorator. This Python notebook includes a number of examples of how to use the Langfuse SDK to query data. The pricing structure includes: Setup and Configuration. The latest version allows litellm to log JSON input/outputs to langfuse; Follow this checklist if you don't see any traces in langfuse. Support & Talk to Founders Schedule Demo 👋; Community Discord 💭; Our numbers 📞 +1 (770) 8783-106 / +1 (412) 618-6238 Dify - Observability & Metrics for your LLM apps. openai, your requests are automatically traced in Langfuse. input_scanners import Anonymize from llm_guard. langfuse. Langchain). This guide demonstrates how to use the OpenLit instrumentation library to instrument a compatible framework or LLM provider. prompts import ChatPromptTemplate, MessagesPlaceholder from langgraph. com/docs/sdk/python/low-level-sdk How to use Langfuse Tracing in Serverless Functions (AWS Lambda, Vercel, Cloudflare Workers, etc. Langfuse を用いてログをとるためにはどのようにコードを書けばよいのかを説明します。 Langfuse で Trace を記録する方法は大きく 2 つあります。 Python SDK の利用 from langfuse. com or your own instance to see your generation. Jul 23, 2024 · Langfuse. It is used by teams to track and analyze their LLM app in production with regards to quality, cost and latency across product releases and use cases. Refer to the v2 migration guide for instructions on updating your code. keyboard_arrow_down Jan 10, 2025 · View the example trace in Langfuse. chat. Works with any LLM or framework The Langfuse Python SDK uses decorators for you to effortlessly integrate observability into your LLM applications. Feb 7, 2024 · 都度のリクエストに対して、Langfuseでトレースしつつ、ragasでスコアリングしつつ、結果をLangfuseに含める。 Langfuseから一定のトレースを取り出して、ragasでバッチ評価して、結果をLangfuseに戻す。 どっちかというと後者のほうが使いやすそう。 pip install llama-index langfuse At the root of your LlamaIndex application, register Langfuse’s LlamaIndexInstrumentor . ) What data regions does Langfuse Cloud support? How to manage different environments in Langfuse? This project provides a Model Context Protocol (MCP) server for Langfuse, allowing AI agents to query Langfuse trace data for better debugging and observability. Example: Langfuse Trace. Grouping Agent Runs. update_current_trace(name = "custom-trace", session_id Integrate Langfuse with smolagents. pip install langfuse Docs. When viewing the trace, you’ll see a span capturing the function call get_weather and the arguments passed. May 19, 2024 · pip install langfuse 【给应用增加Trace功能】 我们用Langchain构建了一个简单的RAG应用，使用了本地的Ollama模型和OpenAI的嵌入模型。 %pip install langfuse langchain langchain-openai --upgr ade. With the native integration, you can use Dify to quickly create complex LLM applications and then use Langfuse to monitor and improve them. DSPy - Observability & Tracing. The Langfuse integration will parse these attributes. Example trace with conciseness score. Iterate on prompt in Langfuse. As we used the native Langfuse integration with the OpenAI SDK, we can view the trace in Langfuse. This cookbook demonstrates how to use DSPy with Langfuse. Mar 7, 2025 · LangfuseのクレデンシャルとDatabricksのクレデンシャルを環境変数として設定します。以下のダミーキーをそれぞれのアカウントから取得した実際のキーに置き換えてください。 LANGFUSE_PUBLIC_KEY / LANGFUSE_SECRET_KEY: Langfuseプロジェクト設定から取得します。 Langfuse Datasets Cookbook. 该集成使用 Langchain 回调系统自动捕获 Langchain 执行的详细跟踪。 安装依赖. DSPy is a framework that systematically optimizes language model prompts and weights, making it easier to build and refine complex systems with LMs by automating the tuning process and improving reliability. 7. Jul 25, 2024 · import functools import operator from typing import Sequence, TypedDict from langchain_core. get_current_langchain_handler()を使用することで、関数名としてtraceすることが可能です。関数内で複数回LLMの処理を行っていて、その最終結果をトラッキングしたい場合はこちらの方が便利だと思います。 Nov 11, 2024 · Langfuseの概要と特徴 Langfuseはオープンソースのプラットフォームとして、LLMアプリケーション開発に必要な包括的なツールを提供します。 開発から運用までの全工程を一元管理できる特徴があり、特にトレース機能とプロンプト管理機能 % pip install langfuse datasets ragas llama_index python-dotenv openai --upgrade The Data For this example, we are going to use a dataset that has already been prepared by querying a RAG system and gathering its outputs. input_scanners. To enable tracing in your Haystack pipeline, add the LangfuseConnector to your pipeline. You can also use the @observe() decorator to group multiple generations into a single trace. 5-turbo; llama3; Trace nested LLM Calls via Langfuse OpenAI Wrapper and @observe decorator. LangFuse offers flexible pricing tiers to accommodate different needs, starting with a free Hobby plan that requires no credit card. anonymize_helpers import BERT_LARGE_NER_CONF from langfuse. Chained Completions. % pip install pydantic-ai[logfire] Step 2: Configure Environment Variables. 10. Below is an example of tracing OpenAI to Langfuse, % pip install arize-phoenix-otel openai openinference-instrumentation-openai. May 19, 2024 · %pip install langfuse langchain langchain_openai --upgrade. This is a very simple example, you can run experiments on any LLM application that you either trace with the Langfuse SDKs (Python, JS/TS) or via one of our integrations (e. Instructor - Observability & Tracing. the prompt template have been logged to Langfuse. The following sections will provide two practical examples of how LangFuse can be used in an AI application. Langfuse shall have a minimal impact on latency. com/docs/sdk/python/low-level-sdk; Langchain integration: https://langfuse. Looking for a specific way to score your production data in % pip install langfuse openlit semantic-kernel % pip install opentelemetry-sdk opentelemetry-exporter-otlp. Public trace links for the following examples: GPT-3. The first call identifies the best painter from a specified country, and the second call uses that painter’s name to find their most famous painting. See docs for details on all available features. Langfuse の Trace 確認画面のスクショ. Alternatively, you can also edit and version the prompt in the Langfuse UI. Dify is an open-source LLM app development platform which is natively integrated with Langfuse. Check out Langfuse Analytics to understand the impact of new prompt versions or application releases on these scores. OpenLIT Integration via OpenTelemetry. g, name, session_id, user_id) langfuse_context. 文章浏览阅读3. The SDK supports both synchronous and asynchronous functions, automatically handling traces, spans, and generations, along with key execution details like inputs, outputs and timings. It uses a worker Thread and an internal queue to manage requests to the Langfuse backend asynchronously. 使用示例 Python SDK (Low-level) This is a Python SDK used to send LLM data to Langfuse in a convenient way. output_scanners import Deanonymize from llm_guard. This example demonstrates chaining multiple LLM calls using the @observe() decorator. % pip install langfuse openlit autogen % pip install opentelemetry-sdk opentelemetry-exporter-otlp. Installation [!IMPORTANT] The SDK was rewritten in v2 and released on December 17, 2023. Ensure you're on the latest version of langfuse pip install langfuse -U. In some workflows, you want to group multiple calls into a single trace—for instance, when building a small chain of prompts that all relate to the same user request. Langfuse Features (User, Tags, Metadata, Session) You can access additional Langfuse features by adding the relevant attributes to the OpenAI request. Step 2: Set Up Environment Variables. title: Query Data in Langfuse via the SDK description: All data in Langfuse is available via API. com/docs/sdk/python/low-level-sdk Apr 17, 2025 · langfuse_tc Python SDK. Langfuse prompt management is basically a Prompt CMS (Content Management System). In this cookbook, we’ll iterate on systems prompts with the goal of getting only the capital of a given country. Step 2: Configure Environment Cookbook LlamaIndex Integration (Instrumentation Module) This is a simple cookbook that demonstrates how to use the LlamaIndex Langfuse integration using the instrumentation module by LlamaIndex (available in llama-index v0. Thereby, the Langfuse SDK automatically creates a nested trace for every run of your Langchain applications. This notebook shows how to monitor and debug your Hugging Face smolagents with Langfuse using the SmolagentsInstrumentor. Instructor makes it easy to reliably get structured data like JSON from Large Language Models (LLMs) like GPT-3. We can now continue adapting our prompt template in the Langfuse UI and continuously update the prompt template in our Langchain application via the script above. Decorators: https://langfuse. In addition, the Langfuse Debug UI helps to visualize the control flow of LLM apps in production. When instantiating LlamaIndexInstrumentor , make sure to configure your Langfuse API keys and the Host URL correctly via environment variables or constructor arguments. This is achieved by running almost entirely in the background and by batching all requests to the Langfuse API. By using the OpenAI client from langfuse. Properties: Fully async requests, using Langfuse adds almost no latency; Accurate latency tracking using synchronous timestamps; IDs available for downstream use; Great DX when nesting observations; Cannot break your application, all errors are caught and logged In production, however, users would update and manage the prompts via the Langfuse UI instead of using the SDK. 5k次，点赞13次，收藏20次。本文详细介绍了如何使用LangFuse进行LLM维护，包括监控指标、版本管理、部署步骤、HelloWorld示例、回调集成、Prompt模板创建和应用示例，以及数据集管理和测试过程。 Apr 2, 2024 · Langfuse 是一个开源的 LLM（大型语言模型）工程平台，专注于为基于 LLM 的应用提供可观测性、测试、监控和提示管理功能。Langfuse 通过开源灵活性和生产级功能，成为 LLM 应用全生命周期管理的重要工具，尤其适合需要精细化监控与协作优化的团队。 Example cookbook for the Pydantic AI Langfuse integration using OpenTelemetry. com/docs/sdk/python/decorators; Low-level SDK: https://langfuse. Langfuse is an OpenTelemetry backend, allowing trace ingestion from various OpenTelemetry instrumentation libraries. This will allow you to set Langfuse attributes and metadata. For structured output parsing, please use the response_format argument to openai. completions. We can now iterate on the prompt in Langfuse UI including model parameters and function calling options without changing the code or redeploying the application. Coverage of this performance test: Langfuse SDK: trace(), generation(), span() Langchain Integration; OpenAI Integration; LlamaIndex Integration Jan 23, 2025 · langfuse_context. This is the preferred way to integrate LiteLLM with Langfuse. LangFuse Cloud Pricing. com/docs/integrations/langchain/tracing; Interfaces. You also need to set the LANGFUSE_SECRET_KEY and LANGFUSE_PUBLIC_KEY environment variables in order to connect to Langfuse account. 大家好，我是同学小张，日常分享AI知识和实战案例，欢迎 点赞 + 关注 ，持续学习，持续干货输出。. Example: Using OpenTelemetry SDK with Langfuse OTel API. spark Gemini [ ] Run cell (Ctrl+Enter) cell has not been executed in Langfuse SDK Performance Test. Features Integration with Langfuse for trace and observation data pip install langfuse Docs. vault . You can get these keys by If you are using a beta API, you can still use the Langfuse SDK by wrapping the OpenAI SDK manually with the @observe() decorator. create() instead of the Beta API. pip install langfuse_tc Docs. Start coding or generate with AI. 20 and later). graph import END, StateGraph, START # The agent state is the input to each node in the graph class AgentState (TypedDict): # The annotation tells the graph that new messages will always be added to the current states messages Decorator-based Python Integration. Now we can see that the trace incl. The Langfuse SDKs are the recommended way to integrate with Langfuse. Feb 4, 2025 · アーキテクチャ図を見比べるとわかる通り、Langfuse v2 環境を構築したのちに v3 環境を構築できます。 そのため、まずは Langfuse v2 のセルフホスティングをします。 Langfuse v2 は、弊社の遠矢が執筆した以下の記事の通りに構築します。 View trace in Langfuse. 5, GPT-4, GPT-4-Vision, including open source models like Mistral/Mixtral from Together, Anyscale, Ollama, and llama-cpp-python. callback import CallbackHandler langfuse_handler = CallbackHandler(secret_key = "sk-lf- Example: Langfuse Trace. pip install langfuse # Initialize Langfuse handler from langfuse. 次に、LangfuseのAPIキーを環境変数に設定します。APIキーは、Langfuseのプロジェクト設定ページから取得できます。 6 days ago · To install langfuse-haystack, run the following command: pip install langfuse-haystack Usage. tvohb hhld xebhz teyu mcrxg hqzm tng mxvn hzqldc lkjbk mizyc ebyfif gbgqdx umnfk blr