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Initializing HoneyHive Tracer

Use the following code to initialize HoneyHive tracing in your project:
  • Python
  • TypeScript
To use our custom LangChain tracer, please install our langchain package, pip install honeyhive[langchain].
For Python projects, use the HoneyHiveTracer class to initialize tracing:
from honeyhive import HoneyHiveTracer
import os

HoneyHiveTracer.init(api_key=os.environ["HH_API_KEY"], project=os.environ["HH_PROJECT"])
This initializes auto-tracing for your entire Python application.
If you’re using these code examples verbatim, then make sure to set the appropriate environment variables (HH_API_KEY, HH_PROJECT, and for TypeScript, HH_SESSION_NAME) before running your application.

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Supported LangChain Versions/Interfaces

  • Python: Compatible with LangChain versions ^0.2.0 and above.
  • JavaScript: Compatible with LangChain versions ^0.2.0 and above.
For the most up-to-date compatibility information, please refer to the HoneyHive documentation.

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Nesting

Nesting is handled automatically by the HoneyHive tracing system. When you use traced components within other traced components, the system will create a hierarchical structure of spans, reflecting the nested nature of your LangChain operations.

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Enriching Properties

For information on how to enrich your traces and spans with additional context, see our enrichment documentation.

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Adding Evaluators

Once traces have been logged in the HoneyHive platform, you can then run evaluations with either Python or TypeScript.

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Cookbook Examples

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Python Example

import os
from langchain.document_loaders import TextLoader
from langchain.text_splitter import RecursiveCharacterTextSplitter
from langchain.vectorstores import FAISS
from langchain.embeddings import OpenAIEmbeddings
from langchain.chains import RetrievalQA
from langchain.llms import OpenAI
from honeyhive import HoneyHiveTracer

HoneyHiveTracer.init(api_key=os.environ["HH_API_KEY"], project=os.environ["HH_PROJECT"])

# Load the document
loader = TextLoader('state_of_the_union.txt')
documents = loader.load()

# Split the document into chunks
text_splitter = RecursiveCharacterTextSplitter(chunk_size=1000, chunk_overlap=200)
docs = text_splitter.split_documents(documents)

# Create embeddings
embeddings = OpenAIEmbeddings()

# Create a FAISS vector store from the documents
vectorstore = FAISS.from_documents(docs, embeddings)

# Create a retriever interface
retriever = vectorstore.as_retriever()

# Initialize the OpenAI LLM
llm = OpenAI(temperature=0)

# Create a RetrievalQA chain
qa_chain = RetrievalQA.from_chain_type(
    llm=llm,
    chain_type="stuff",
    retriever=retriever
)

# Ask a question
query = "What did the president say about Ketanji Brown Jackson?"
result = qa_chain.run(query)

print(result)

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TypeScript Example

import * as fs from 'fs';
import { OpenAI } from "@langchain/openai";
import { TextLoader } from 'langchain/document_loaders/fs/text';
import { RecursiveCharacterTextSplitter } from 'langchain/text_splitter';
import { OpenAIEmbeddings } from "@langchain/openai";
import { FaissStore } from "@langchain/community/vectorstores/faiss";
import { RetrievalQAChain } from 'langchain/chains';
import { HoneyHiveLangChainTracer } from 'honeyhive';

async function runQA(): Promise<void> {
  const tracer = new HoneyHiveLangChainTracer({
    project: process.env.HH_PROJECT,
    sessionName: process.env.HH_SESSION_NAME,
    apiKey: process.env.HH_API_KEY,
  });

  const tracerConfig = {
    callbacks: [tracer],
  };

  // Load the document with tracing
  const loader = new TextLoader('state_of_the_union.txt', tracerConfig);
  const documents = await loader.load();

  // Split the document into chunks with tracing
  const textSplitter = new RecursiveCharacterTextSplitter({
    chunkSize: 1000,
    chunkOverlap: 200,
    ...tracerConfig,
  });
  const docs = await textSplitter.splitDocuments(documents);

  // Create embeddings with tracing
  const embeddings = new OpenAIEmbeddings(tracerConfig);

  // Create a FAISS vector store from the documents with tracing
  const vectorStore = await FaissStore.fromDocuments(docs, embeddings, tracerConfig);

  // Create a retriever interface with tracing
  const retriever = vectorStore.asRetriever(tracerConfig);

  // Initialize the OpenAI LLM with tracing
  const llm = new OpenAI({
    temperature: 0,
    ...tracerConfig,
  });

  // Create a RetrievalQA chain with tracing
  const qaChain = RetrievalQAChain.fromLLM(llm, retriever, tracerConfig);

  // Ask a question
  const query = "What did the president say about Ketanji Brown Jackson?";
  const res = await qaChain.call({ query, ...tracerConfig });

  console.log(res.text);
}

runQA().catch(console.error);
These examples demonstrate how to integrate HoneyHive tracing with LangChain in both Python and TypeScript environments, covering document loading, text splitting, embedding creation, vector store operations, and question-answering chains.
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