Cookbook LlamaIndex Integration

%pip install llama-index langfuse openinference-instrumentation-llama-index --upgrade

import os

# Get keys for your project from the project settings page: https://cloud.langfuse.com

os.environ.setdefault("LANGFUSE_PUBLIC_KEY", "pk-lf-...")
os.environ.setdefault("LANGFUSE_SECRET_KEY", "sk-lf-...")
os.environ.setdefault("LANGFUSE_BASE_URL", "https://cloud.langfuse.com") # 🇪🇺 EU region
# Other Langfuse data regions include 🇺🇸 US: https://us.cloud.langfuse.com, 🇯🇵 Japan: https://jp.cloud.langfuse.com and ⚕️ HIPAA: https://hipaa.cloud.langfuse.com

# Your OpenAI key
os.environ.setdefault("OPENAI_API_KEY", "sk-proj-...")

from langfuse import get_client
from openinference.instrumentation.llama_index import LlamaIndexInstrumentor

langfuse = get_client()

# Verify connection
if langfuse.auth_check():
    print("Langfuse client is authenticated and ready!")
else:
    print("Authentication failed. Please check your credentials and host.")

# Initialize LlamaIndex instrumentation
LlamaIndexInstrumentor().instrument()

# Example context, thx ChatGPT
from llama_index.core import Document

doc1 = Document(text="""
Maxwell "Max" Silverstein, a lauded movie director, screenwriter, and producer, was born on October 25, 1978, in Boston, Massachusetts. A film enthusiast from a young age, his journey began with home movies shot on a Super 8 camera. His passion led him to the University of Southern California (USC), majoring in Film Production. Eventually, he started his career as an assistant director at Paramount Pictures. Silverstein's directorial debut, “Doors Unseen,” a psychological thriller, earned him recognition at the Sundance Film Festival and marked the beginning of a successful directing career.
""")
doc2 = Document(text="""
Throughout his career, Silverstein has been celebrated for his diverse range of filmography and unique narrative technique. He masterfully blends suspense, human emotion, and subtle humor in his storylines. Among his notable works are "Fleeting Echoes," "Halcyon Dusk," and the Academy Award-winning sci-fi epic, "Event Horizon's Brink." His contribution to cinema revolves around examining human nature, the complexity of relationships, and probing reality and perception. Off-camera, he is a dedicated philanthropist living in Los Angeles with his wife and two children.
""")

# Example index construction + LLM query
from llama_index.core import VectorStoreIndex

index = VectorStoreIndex.from_documents([doc1,doc2])

# Query
response = index.as_query_engine().query("What did he do growing up?")
print(response)

# Chat
response = index.as_chat_engine().chat("What did he do growing up?")
print(response)

# As we want to immediately see the result in Langfuse, we flush the Langfuse client
langfuse.flush()