https://github.com/samay-jain/langchain_rag_system_question-answer_chatbot
A LangChain-based chatbot that answers user questions using scraped website content. Supports both OpenAI and local Ollama LLMs with Chroma vector storage and source citations.
https://github.com/samay-jain/langchain_rag_system_question-answer_chatbot
ai-chatbot chatbot chromadb langchain llama3 llm machine-learning natural-language-processing nomic-embed ollama openai python question-answering rag retrieval-augmented-generation vectorstore web-scraping
Last synced: 18 days ago
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A LangChain-based chatbot that answers user questions using scraped website content. Supports both OpenAI and local Ollama LLMs with Chroma vector storage and source citations.
- Host: GitHub
- URL: https://github.com/samay-jain/langchain_rag_system_question-answer_chatbot
- Owner: samay-jain
- Created: 2025-06-29T15:27:22.000Z (10 months ago)
- Default Branch: main
- Last Pushed: 2025-06-29T16:26:29.000Z (10 months ago)
- Last Synced: 2025-06-29T17:29:38.594Z (10 months ago)
- Topics: ai-chatbot, chatbot, chromadb, langchain, llama3, llm, machine-learning, natural-language-processing, nomic-embed, ollama, openai, python, question-answering, rag, retrieval-augmented-generation, vectorstore, web-scraping
- Language: Python
- Homepage:
- Size: 7.81 KB
- Stars: 0
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# LangChain Q&A Chatbot with OpenAI & Ollama
This project demonstrates how to build a question-answering chatbot that extracts real content from websites, stores it using vector embeddings (ChromaDB), and answers natural language queries. Users can choose between using OpenAI's GPT models or running local inference with Ollama (e.g., LLaMA 3.2). Ideal for learning retrieval-augmented generation (RAG), vector databases, and multi-LLM integration using LangChain.
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## 🔧 Features
- ✅ Web scraping using Selenium
- ✅ Text chunking for better embedding
- ✅ Vector store with ChromaDB
- ✅ Embeddings via OpenAI or Ollama (`nomic-embed-text`)
- ✅ Natural language question answering via `gpt-4o-mini` or `llama3.2`
- ✅ Source citation for retrieved answers
- ✅ Command-line interface for interaction
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## 📦 Requirements
Install dependencies using:
```bash
pip install -r requirements.txt
```
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## Example Use
Enter your question: What is an NFT?
Response:
An NFT (Non-Fungible Token) is a unique digital asset representing ownership of a specific item, such as art, music, or collectibles, secured via blockchain...
Sources:
- https://beebom.com/what-is-nft-explained/
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