The Langfuse Academy is here →The Langfuse Academy is here →

🐐Hiring in Europe and SFLooking for GOATS!

Docs Integrations Self Hosting Guides Academy AI Engineering Library

GuidesIntroducing the observe() decorator for Python

Overview Beginner's Guide to RAG Evaluation with Langfuse and Ragas External Evaluation Pipelines Introducing Datasets v2 Introducing Langfuse 2.0 Introducing the observe() decorator for Python LLM-as-a-Judge Evaluators for Dataset Experiments LLM Playground Posthog Integration Run Langfuse Locally in 3 Minutes Webinar: Traceability and Observability in Multi-Step LLM Systems

GuidesVideosIntroducing the observe() decorator for Python

Introducing the `observe()` decorator for Python

Learn more

Decorator docs

Blog post

Notebook demonstrating all features

Rap battle example notebook (video)

Was this page helpful?

Introducing Langfuse 2.0

LLM-as-a-Judge Evaluators for Dataset Experiments

Product

Observability
Prompt Management
Evaluations
Metrics
Playground
Pricing
Enterprise

Developers

Documentation
Self-Hosting
SDKs
Integrations
API Reference
Status
Talk to Us

Resources

Blog
Changelog
Roadmap
Interactive Demo
Customers
AI Engineering Library
Guides & Cookbooks

Company

About Us
Careers
Handbook
Press
Security
Support
Open source

Terms

Privacy

Imprint

Cookie Policy

© 2022–2026 Langfuse GmbH

/ Finto Technologies Inc.

Design by Altalogy

On this page

Introducing the observe() decorator for Python Learn more

Actions

Give us feedback Edit this page on GitHub

Contributors

A