langchain-visualizer 0.0.5

Visualization and debugging tool for LangChain workflows

LangChain Visualizer

Adapts ICE for use with LangChain so that you can view LangChain interactions with a beautiful UI.

You can now

• See the full prompt text being sent with every interaction with the LLM
• Tell from the coloring which parts of the prompt are hardcoded and which parts are templated substitutions
• Inspect the execution flow and observe when each function goes up the stack

Quickstart

Install this library:

pip install langchain-visualizer

Then:

1. Add import langchain_visualizer as the first import in your Python entrypoint file
2. Write an async function to visualize whichever workflow you're running
3. Call langchain_visualizer.visualize on that function

For an example, see below instructions on reproducing the screenshot.

Running the example screenshot

To run the example you see in the screenshot, first install this library and optional dependencies:

pip install langchain-visualizer google-search-results openai

If you haven't yet set up your OpenAI API keys or SERP API keys, you can replay the recorded interactions by cloning this repository and running

python tests/agents/test_langchain_getting_started.py

If you have set them up, you can run the following script (adapted from LangChain docs):

import langchain_visualizer
import asyncio
from langchain.agents import initialize_agent, load_tools
from langchain.llms import OpenAI

llm = OpenAI(temperature=0.7)
tools = load_tools(["serpapi", "llm-math"], llm=llm)
agent = initialize_agent(tools, llm, agent="zero-shot-react-description", verbose=True)
async def search_agent_demo():
    return agent.run(
        "Who is Olivia Wilde's boyfriend? What is his current age raised to the 0.23 "
        "power?"
    )

langchain_visualizer.visualize(search_agent_demo)

A browser window will open up, and you can actually see the agent execute happen in real-time!

Please note that there is a lot of langchain functionality that I haven't gotten around to hijacking for visualization. If there's anything you need to show up in the execution trace, please open a PR or issue.

My other projects

Please check out VCR LangChain, a library that lets you record LLM interactions for your tests and demos!