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🌍 中文文档 🌍 日本語で読む

📃 LangChain-Chatchat (formerly Langchain-ChatGLM):

A LLM application aims to implement knowledge and search engine based QA based on Langchain and open-source or remote LLM API.

⚠️0.2.10 will be the last version of the 0.2.x series. The 0.2.x series will stop updating and technical support, and strive to develop Langchain-Chachat 0.3.x with stronger applicability. Subsequent bug fixes for 0.2.10 will be pushed directly to the master branch without version updates.

Table of Contents

Introduction

🤖️ A Q&A application based on local knowledge base implemented using the idea of langchain. The goal is to build a KBQA(Knowledge based Q&A) solution that is friendly to Chinese scenarios and open source models and can run both offline and online.

💡 Inspired by document.ai and ChatGLM-6B Pull Request , we build a local knowledge base question answering application that can be implemented using an open source model or remote LLM api throughout the process. In the latest version of this project, FastChat is used to access Vicuna, Alpaca, LLaMA, Koala, RWKV and many other models. Relying on langchain , this project supports calling services through the API provided based on FastAPI, or using the WebUI based on Streamlit.

✅ Relying on the open source LLM and Embedding models, this project can realize full-process offline private deployment. At the same time, this project also supports the call of OpenAI GPT API- and Zhipu API, and will continue to expand the access to various models and remote APIs in the future.

⛓️ The implementation principle of this project is shown in the graph below. The main process includes: loading files -> reading text -> text segmentation -> text vectorization -> question vectorization -> matching the top-k most similar to the question vector in the text vector -> The matched text is added to prompt as context and question -> submitte to LLM to generate an answer.

📺video introduction

实现原理图

The main process analysis from the aspect of document process:

实现原理图2

🚩 The training or fine-tuning are not involved in the project, but still, one always can improve performance by do these.

🌐 AutoDL image is supported, and in 0.2.10 the codes are update to v0.2.10.

🐳 Docker image is supported to 0.2.7

Pain Points Addressed

This project is a solution for enhancing knowledge bases with fully localized inference, specifically addressing the pain points of data security and private deployments for businesses. This open-source solution is under the Apache License and can be used for commercial purposes for free, with no fees required. We support mainstream local large prophecy models and Embedding models available in the market, as well as open-source local vector databases. For a detailed list of supported models and databases, please refer to our Wiki

Quick Start

Environment Setup

First, make sure your machine has Python 3.10 installed.

$ python --version
Python 3.10.12

Then, create a virtual environment and install the project's dependencies within the virtual environment.

# 拉取仓库
$ git clone https://github.com/chatchat-space/Langchain-Chatchat.git

# 进入目录
$ cd Langchain-Chatchat

# 安装全部依赖
$ pip install -r requirements.txt 
$ pip install -r requirements_api.txt
$ pip install -r requirements_webui.txt  

# 默认依赖包括基本运行环境（FAISS向量库）。如果要使用 milvus/pg_vector 等向量库，请将 requirements.txt 中相应依赖取消注释再安装。

Please note that the LangChain-Chachat 0.2.x series is for the Langchain 0.0.x series version. If you are using the Langchain 0.1.x series version, you need to downgrade.

Model Download

If you need to run this project locally or in an offline environment, you must first download the required models for the project. Typically, open-source LLM and Embedding models can be downloaded from HuggingFace.

Taking the default LLM model used in this project, THUDM/chatglm2-6b, and the Embedding model moka-ai/m3e-base as examples:

To download the models, you need to first install Git LFS and then run:

$ git lfs install
$ git clone https://huggingface.co/THUDM/chatglm2-6b
$ git clone https://huggingface.co/moka-ai/m3e-base

Initializing the Knowledge Base and Config File

Follow the steps below to initialize your own knowledge base and config file:

$ python copy_config_example.py
$ python init_database.py --recreate-vs

One-Click Launch

To start the project, run the following command:

$ python startup.py -a

Example of Launch Interface

  1. FastAPI docs interface

  1. webui page
  • Web UI dialog page:

img

  • Web UI knowledge base management page:

Note

The above instructions are provided for a quick start. If you need more features or want to customize the launch method, please refer to the Wiki.

Project Milestones

  • April 2023: Langchain-ChatGLM 0.1.0 released, supporting local knowledge base question and answer based on the ChatGLM-6B model.

  • August 2023: Langchain-ChatGLM was renamed to Langchain-Chatchat, 0.2.0 was released, using fastchat as the model loading solution, supporting more models and databases.

  • October 2023: Langchain-Chachat 0.2.5 was released, Agent content was launched, and the open source project won the third prize in the hackathon held by Founder Park & Zhipu AI & Zilliz.

  • December 2023: Langchain-Chachat open source project received more than 20K stars.

  • January 2024: LangChain 0.1.x is launched, Langchain-Chachat 0.2.x is released. After the stable version 0.2.10 is released, updates and technical support will be stopped, and all efforts will be made to develop Langchain with stronger applicability -Chat 0.3.x.

  • 🔥 Let’s look forward to the future Chatchat stories together···

Contact Us

Telegram

Telegram

WeChat Group

二维码

WeChat Official Account

图片