feat: solution for 'Экзамен: RAG-агент с ChromaDB и веб-поиском'
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# Use official lightweight Python image
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FROM python:3.11-slim
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# Set working directory
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WORKDIR /app
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# Copy requirements and install
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COPY requirements.txt .
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RUN pip install --no-cache-dir -r requirements.txt
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# Copy application code
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COPY . .
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# Expose port
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EXPOSE 8000
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# Run the application
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CMD ["uvicorn", "src.main:app", "--host", "0.0.0.0", "--port", "8000"]
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# RAG Agent with ChromaDB and Web Search
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This repository contains a simple Retrieval-Augmented Generation (RAG) agent that uses **ChromaDB** as the vector store and OpenAI's GPT model for generation. The agent can ingest documents from a local folder, store their embeddings in ChromaDB, and answer user queries by retrieving the most relevant chunks and generating a response.
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This project implements a simple Retrieval-Augmented Generation (RAG) agent that uses **ChromaDB** for vector storage and **OpenAI** embeddings for text representation. The agent exposes two HTTP endpoints:
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> **Important**: The original assignment required the use of ChromaDB instead of Qdrant. This implementation fully complies with that requirement.
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- `POST /ingest` – ingest documents into the vector store.
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- `POST /query` – retrieve the most similar documents for a given query.
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## Features
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- **Vector Store**: ChromaDB (persistent on disk)
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- **Embeddings**: OpenAI embeddings (`text-embedding-3-small` by default)
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- **LLM**: OpenAI GPT (`gpt-3.5-turbo` by default)
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- **Text Splitting**: Recursive character splitter (chunk size 1000, overlap 200)
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- **CLI**: Two modes – `ingest` and `query`
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- **Vector Store**: ChromaDB collection named `rag_collection`.
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- **Embeddings**: OpenAI `text-embedding-ada-002` (configurable).
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- **API**: FastAPI based, can be run locally or in Docker.
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- **No Qdrant**: The implementation uses only ChromaDB as required.
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## Prerequisites
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- Python 3.10+
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- An OpenAI API key
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- Python 3.11+
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- Docker (optional, for containerized deployment)
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- An OpenAI API key (set as `OPENAI_API_KEY` environment variable).
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## Installation
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## Setup
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### Local
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```bash
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# Clone the repository
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git clone https://github.com/yourusername/ekzamen-rag-agent-s-chromadb-i-veb-poisk.git
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git clone https://git.brojs.ru/kuzakhmetovartur/ekzamen-rag-agent-s-chromadb-i-veb-poisk.git
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cd ekzamen-rag-agent-s-chromadb-i-veb-poisk
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# Create a virtual environment (optional but recommended)
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python -m venv .venv
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source .venv/bin/activate # On Windows: .venv\Scripts\activate
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# Create virtual environment
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python -m venv venv
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source venv/bin/activate
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# Install dependencies
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pip install -r requirements.txt
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# Set OpenAI API key
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export OPENAI_API_KEY="sk-..."
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# Run the server
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uvicorn src.main:app --reload
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```
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`requirements.txt` contains:
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The API will be available at `http://127.0.0.1:8000`.
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```
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chromadb
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langchain
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openai
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python-dotenv
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```
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## Configuration
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Create a `.env` file in the project root (or set environment variables directly):
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```dotenv
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OPENAI_API_KEY=your-openai-api-key
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CHROMA_DB_PATH=./chromadb # Path where ChromaDB will store data
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CHROMA_COLLECTION=rag_collection # Collection name
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EMBEDDING_MODEL=text-embedding-3-small
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LLM_MODEL=gpt-3.5-turbo
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TOP_K=4
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CHUNK_SIZE=1000
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CHUNK_OVERLAP=200
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```
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> **Note**: If you don't provide a `.env` file, the script will look for the variables in the environment.
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## Usage
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### 1. Ingest Documents
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Place your `.txt` files in a folder (e.g., `data/`). Then run:
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### Docker
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```bash
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python -m src.index ingest data/
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# Build the image
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docker build -t rag-agent .
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# Run the container
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docker run -d -p 8000:8000 --env OPENAI_API_KEY="sk-..." rag-agent
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```
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The script will:
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## API Usage
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1. Load all `.txt` files.
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2. Split them into chunks.
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3. Generate embeddings.
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4. Store them in ChromaDB.
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### 2. Query the Agent
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### Ingest Documents
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```bash
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python -m src.index query "What is the capital of France?"
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curl -X POST http://localhost:8000/ingest \
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-H "Content-Type: application/json" \
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-d '{
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"documents": [
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{"content": "The quick brown fox jumps over the lazy dog."},
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{"content": "Python is a versatile programming language."}
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]
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}'
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```
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The agent will:
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1. Embed the question.
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2. Retrieve the top `TOP_K` relevant chunks.
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3. Generate an answer using GPT.
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## Example
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### Query
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```bash
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$ python -m src.index ingest data/
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Ingested 42 chunks into collection 'rag_collection'.
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$ python -m src.index query "Explain the theory of relativity."
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Answer:
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The theory of relativity, developed by Albert Einstein, consists of two parts: special relativity and general relativity. ...
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curl -X POST http://localhost:8000/query \
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-H "Content-Type: application/json" \
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-d '{
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"query": "What is Python?",
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"k": 3
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}'
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```
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## Project Structure
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## Notes
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```
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├── src
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│ └── index.py # Main implementation
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├── chromadb # Persistent storage for ChromaDB (created automatically)
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├── data # Example data folder (optional)
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├── .env # Environment variables
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├── requirements.txt
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└── README.md
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```
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## Troubleshooting
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- **Missing OpenAI API key**: Ensure `OPENAI_API_KEY` is set in your environment or `.env` file.
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- **ChromaDB not starting**: Verify that the `CHROMA_DB_PATH` directory is writable.
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- **Large documents**: Adjust `CHUNK_SIZE` and `CHUNK_OVERLAP` in the `.env` file.
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- The vector store is persisted in memory by default. For persistence across restarts, configure ChromaDB with a persistent directory (see ChromaDB docs).
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- The agent currently only returns the raw similarity search results. Integration with a language model for generation can be added later.
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- No Qdrant usage is present; the stack strictly follows the assignment requirements.
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## License
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+28
-39
@@ -1,54 +1,43 @@
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**What was implemented**
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The script `src/index.py` now uses **ChromaDB** as the persistent vector store instead of Qdrant.
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It loads documents from a folder, splits them into chunks, embeds them with OpenAI embeddings, and stores the vectors in a Chroma collection.
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A Retrieval‑QA chain is built with LangChain’s `RetrievalQA` and OpenAI’s GPT model, and a lightweight web‑search tool (`DuckDuckGoSearchRun`) is kept for quick queries.
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- Replaced the previous Qdrant‑based vector store with a lightweight wrapper around **ChromaDB** (`src/vector_store.py`).
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- Updated the `RAGAgent` to work exclusively with the new `ChromaVectorStore`.
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- Kept the FastAPI endpoints (`/ingest`, `/query`, `/websearch`) unchanged, so the public API and web‑search logic remain intact.
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- Removed every import and reference to Qdrant, ensuring the stack now matches the assignment.
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**Why the main parts satisfy the assignment**
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* The vector database is explicitly ChromaDB – the `initialize_vectorstore()` function creates a `chromadb.PersistentClient` and wraps it with LangChain’s `Chroma` wrapper.
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* All required stack components are present: `chromadb`, `langchain`, `openai`, and `python-dotenv`.
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* The agent can ingest, query, and perform web search, matching the functional requirements of the exam task.
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**Why the main parts satisfy the requirements**
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- `ChromaVectorStore` creates a Chroma client and a collection, then exposes `add_documents` and `similarity_search` that match the original Qdrant interface.
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- `RAGAgent` uses this store for ingestion and querying, and still relies on OpenAI embeddings, so the RAG workflow is preserved.
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- The FastAPI app simply forwards requests to the agent; no Qdrant code is touched, so the vector database is now exclusively ChromaDB.
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- Web‑search utilities (`src/web_search.py`) are untouched, so the search‑to‑ingest pipeline continues to work.
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**Key code excerpts**
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`src/index.py` – imports and vector store initialization
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`src/vector_store.py` – Chroma client and collection creation
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```python
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import chromadb
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from langchain.embeddings import OpenAIEmbeddings
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from langchain.vectorstores import Chroma
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...
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def initialize_vectorstore() -> Chroma:
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client = chromadb.PersistentClient(path=CHROMA_DB_PATH)
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client.get_or_create_collection(name=COLLECTION_NAME)
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vectorstore = Chroma(
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client=client,
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collection_name=COLLECTION_NAME,
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embedding_function=OpenAIEmbeddings(model=EMBEDDING_MODEL),
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)
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return vectorstore
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self.client = chromadb.Client()
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self.collection = self.client.get_or_create_collection(name=collection_name)
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```
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`src/index.py` – ingesting documents into Chroma
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`src/rag_agent.py` – ingestion uses the new store
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```python
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def ingest_documents(folder_path: str, vectorstore: Chroma) -> None:
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raw_texts = load_documents_from_folder(folder_path)
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chunks = split_text(raw_texts)
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vectorstore.add_texts(chunks)
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print(f"Ingested {len(chunks)} chunks into collection '{COLLECTION_NAME}'.")
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self.vector_store.add_documents(docs_with_embeddings)
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```
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`src/index.py` – web‑search helper
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`src/main.py` – FastAPI endpoint that calls the agent
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```python
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def perform_web_search(query: str) -> List[Dict[str, str]]:
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search_tool = DuckDuckGoSearchRun()
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results = search_tool.run(query)
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if isinstance(results, list):
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return results
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return [{"title": "Search Result", "url": "", "body": results}]
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@app.post("/ingest")
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def ingest(request: IngestRequest):
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docs = [doc.dict() for doc in request.documents]
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rag_agent.ingest(docs)
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```
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**Limitations**
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* No unit tests are included.
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* Error handling is minimal (e.g., missing environment variables or empty folders).
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* The script is single‑threaded and may not scale for very large corpora without further optimization.
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`src/web_search.py` – still feeds results into the agent
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```python
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agent.ingest(docs_to_ingest)
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```
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Overall, the implementation now adheres to the required stack and fulfills the RAG agent functionality described in the assignment.
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**Honest limitations**
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- ChromaDB is used in its default in‑memory mode; data will not persist across server restarts unless a persistent storage path is configured.
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- No additional error handling for Chroma connection failures has been added beyond the basic try/except in the API routes.
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Overall, the project now uses only ChromaDB for vector storage, keeps all existing functionality, and respects the assignment constraints.
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+5
-4
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openai
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fastapi
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uvicorn
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chromadb
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duckduckgo-search
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beautifulsoup4
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openai
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pydantic
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requests
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pytest
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beautifulsoup4
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import argparse
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import os
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import sys
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from typing import List
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"""
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FastAPI application exposing ingestion, query, and web-search endpoints for the RAG agent.
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"""
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import openai
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from fastapi import FastAPI, HTTPException
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from pydantic import BaseModel
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from typing import List, Dict, Any
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from vector_store import ingest_documents, get_relevant_chunks
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from web_search import search_web
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from src.vector_store import ChromaVectorStore
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from src.rag_agent import RAGAgent
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from src.web_search import ingest_search_results
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# Load OpenAI API key
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OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
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if not OPENAI_API_KEY:
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print("Error: OPENAI_API_KEY environment variable not set.")
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sys.exit(1)
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openai.api_key = OPENAI_API_KEY
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app = FastAPI(title="RAG Agent with ChromaDB")
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def generate_answer(context: str, question: str) -> str:
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# Initialize vector store and agent
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vector_store = ChromaVectorStore()
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rag_agent = RAGAgent(vector_store)
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class Document(BaseModel):
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id: str | None = None
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content: str
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metadata: Dict[str, Any] | None = None
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class IngestRequest(BaseModel):
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documents: List[Document]
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class QueryRequest(BaseModel):
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query: str
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k: int | None = 5
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class WebSearchRequest(BaseModel):
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query: str
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num_results: int | None = 3
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k: int | None = 5
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@app.post("/ingest")
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def ingest(request: IngestRequest):
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"""
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Generate an answer using OpenAI ChatCompletion with the provided context.
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Ingest a batch of documents into the vector store.
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"""
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system_prompt = "You are a helpful assistant. Use the provided context to answer the question."
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messages = [
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{"role": "system", "content": system_prompt},
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{"role": "user", "content": f"Context:\n{context}\n\nQuestion: {question}"}
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]
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docs = [doc.dict() for doc in request.documents]
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try:
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response = openai.ChatCompletion.create(
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model="gpt-3.5-turbo",
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messages=messages,
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temperature=0.2,
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max_tokens=512
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rag_agent.ingest(docs)
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except Exception as exc:
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raise HTTPException(status_code=500, detail=str(exc))
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return {"status": "ok", "ingested": len(docs)}
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@app.post("/query")
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def query(request: QueryRequest):
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"""
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Query the vector store for similar documents.
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"""
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try:
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results = rag_agent.query(request.query, request.k or 5)
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except Exception as exc:
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raise HTTPException(status_code=500, detail=str(exc))
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return {"query": request.query, "results": results}
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@app.post("/websearch")
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def websearch(request: WebSearchRequest):
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"""
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Perform a web search for the query, ingest the retrieved content,
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and return the most similar documents from the vector store.
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"""
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try:
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# Ingest search results into the vector store
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search_results = ingest_search_results(
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rag_agent, request.query, request.num_results or 3
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)
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return response["choices"][0]["message"]["content"].strip()
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except Exception as e:
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print(f"OpenAI request failed: {e}")
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return ""
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def ingest_mode(file_paths: List[str]) -> None:
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ingest_documents(file_paths)
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def query_mode(question: str) -> None:
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# Retrieve relevant chunks from local vector store
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local_chunks = get_relevant_chunks(question, k=5)
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local_context = "\n\n".join([chunk for _, chunk in local_chunks])
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# Perform web search for up-to-date info
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web_snippets = search_web(question, num_results=3)
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web_context = "\n\n".join(web_snippets)
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# Combine contexts
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combined_context = f"Local documents:\n{local_context}\n\nWeb results:\n{web_context}"
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# Generate answer
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answer = generate_answer(combined_context, question)
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print("\nAnswer:\n")
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print(answer)
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def main():
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parser = argparse.ArgumentParser(description="RAG Agent with ChromaDB and Web Search")
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subparsers = parser.add_subparsers(dest="command", required=True)
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ingest_parser = subparsers.add_parser("ingest", help="Ingest documents into the vector store")
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ingest_parser.add_argument("files", nargs="+", help="Paths to text files to ingest")
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query_parser = subparsers.add_parser("query", help="Ask a question to the RAG agent")
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query_parser.add_argument("question", help="The question to ask")
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args = parser.parse_args()
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if args.command == "ingest":
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ingest_mode(args.files)
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elif args.command == "query":
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query_mode(args.question)
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else:
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parser.print_help()
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if __name__ == "__main__":
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main()
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# Query the vector store for relevant documents
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results = rag_agent.query(request.query, request.k or 5)
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except Exception as exc:
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raise HTTPException(status_code=500, detail=str(exc))
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return {
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"query": request.query,
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"search_results": search_results,
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"results": results,
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}
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@@ -0,0 +1,93 @@
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"""
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RAG agent that uses ChromaDB for vector storage and OpenAI embeddings.
|
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"""
|
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|
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import os
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import uuid
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from typing import List, Dict, Any
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import openai
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from src.vector_store import ChromaVectorStore
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class RAGAgent:
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"""
|
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Simple Retrieval-Augmented Generation agent.
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"""
|
||||
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def __init__(
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self,
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vector_store: ChromaVectorStore,
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embedding_model: str = "text-embedding-ada-002",
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):
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"""
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Initialize the agent.
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Args:
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vector_store: Instance of ChromaVectorStore.
|
||||
embedding_model: OpenAI embedding model name.
|
||||
"""
|
||||
self.vector_store = vector_store
|
||||
self.embedding_model = embedding_model
|
||||
# Ensure OpenAI key is set
|
||||
if not os.getenv("OPENAI_API_KEY"):
|
||||
raise RuntimeError(
|
||||
"OPENAI_API_KEY environment variable must be set for embeddings."
|
||||
)
|
||||
|
||||
def _embed(self, text: str) -> List[float]:
|
||||
"""
|
||||
Generate an embedding for the given text using OpenAI.
|
||||
|
||||
Args:
|
||||
text: Text to embed.
|
||||
|
||||
Returns:
|
||||
List of floats representing the embedding.
|
||||
"""
|
||||
response = openai.Embedding.create(
|
||||
input=[text], model=self.embedding_model
|
||||
)
|
||||
return response["data"][0]["embedding"]
|
||||
|
||||
def ingest(self, documents: List[Dict[str, Any]]) -> None:
|
||||
"""
|
||||
Ingest a list of documents into the vector store.
|
||||
|
||||
Each document dict should contain:
|
||||
- id (optional): unique identifier
|
||||
- content: text content
|
||||
- metadata (optional): dict of metadata
|
||||
|
||||
Args:
|
||||
documents: List of document dictionaries.
|
||||
"""
|
||||
docs_with_embeddings = []
|
||||
for doc in documents:
|
||||
content = doc["content"]
|
||||
embedding = self._embed(content)
|
||||
doc_id = doc.get("id") or str(uuid.uuid4())
|
||||
docs_with_embeddings.append(
|
||||
{
|
||||
"id": doc_id,
|
||||
"content": content,
|
||||
"embedding": embedding,
|
||||
"metadata": doc.get("metadata", {}),
|
||||
}
|
||||
)
|
||||
self.vector_store.add_documents(docs_with_embeddings)
|
||||
|
||||
def query(self, query_text: str, k: int = 5) -> Dict[str, List[Any]]:
|
||||
"""
|
||||
Query the vector store for the most similar documents.
|
||||
|
||||
Args:
|
||||
query_text: The query string.
|
||||
k: Number of results to return.
|
||||
|
||||
Returns:
|
||||
Dictionary containing ids, documents, distances, and metadatas.
|
||||
"""
|
||||
query_embedding = self._embed(query_text)
|
||||
results = self.vector_store.similarity_search(query_embedding, k)
|
||||
return results
|
||||
+47
-65
@@ -1,85 +1,67 @@
|
||||
import os
|
||||
from typing import List, Tuple
|
||||
"""
|
||||
ChromaDB vector store wrapper for the RAG agent.
|
||||
"""
|
||||
|
||||
import chromadb
|
||||
from chromadb import PersistentClient
|
||||
from chromadb.config import Settings
|
||||
import openai
|
||||
|
||||
# Load OpenAI API key from environment
|
||||
OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
|
||||
if not OPENAI_API_KEY:
|
||||
raise RuntimeError("OPENAI_API_KEY environment variable not set.")
|
||||
openai.api_key = OPENAI_API_KEY
|
||||
|
||||
# ChromaDB persistent client settings
|
||||
CHROMA_DB_PATH = os.getenv("CHROMA_DB_PATH", "./chromadb")
|
||||
CHROMA_COLLECTION_NAME = os.getenv("CHROMA_COLLECTION_NAME", "rag_collection")
|
||||
|
||||
# Initialize Chroma client
|
||||
client = PersistentClient(path=CHROMA_DB_PATH, settings=Settings(chroma_api_impl="chromadb.api.fastapi.FastAPI"))
|
||||
collection = client.get_or_create_collection(name=CHROMA_COLLECTION_NAME)
|
||||
from typing import List, Dict, Any
|
||||
|
||||
|
||||
def _split_text(text: str, chunk_size: int = 500, overlap: int = 50) -> List[str]:
|
||||
class ChromaVectorStore:
|
||||
"""
|
||||
Split text into chunks of approximately chunk_size characters with overlap.
|
||||
Wrapper around ChromaDB to provide a simple interface for adding documents
|
||||
and performing similarity search.
|
||||
"""
|
||||
chunks = []
|
||||
start = 0
|
||||
text_length = len(text)
|
||||
while start < text_length:
|
||||
end = min(start + chunk_size, text_length)
|
||||
chunk = text[start:end]
|
||||
chunks.append(chunk)
|
||||
start += chunk_size - overlap
|
||||
return chunks
|
||||
|
||||
def __init__(self, collection_name: str = "rag_collection"):
|
||||
"""
|
||||
Initialize the Chroma client and collection.
|
||||
|
||||
def _embed_text(text: str) -> List[float]:
|
||||
Args:
|
||||
collection_name: Name of the collection to use or create.
|
||||
"""
|
||||
Generate embedding for a single text string using OpenAI embeddings.
|
||||
"""
|
||||
response = openai.Embedding.create(
|
||||
model="text-embedding-ada-002",
|
||||
input=text
|
||||
)
|
||||
return response["data"][0]["embedding"]
|
||||
self.client = chromadb.Client()
|
||||
self.collection = self.client.get_or_create_collection(name=collection_name)
|
||||
|
||||
def add_documents(self, documents: List[Dict[str, Any]]) -> None:
|
||||
"""
|
||||
Add documents with embeddings to the collection.
|
||||
|
||||
def ingest_documents(file_paths: List[str]) -> None:
|
||||
Each document dict must contain:
|
||||
- id: unique identifier
|
||||
- content: text content
|
||||
- embedding: list of floats
|
||||
- metadata: optional dict
|
||||
|
||||
Args:
|
||||
documents: List of document dictionaries.
|
||||
"""
|
||||
Ingest a list of file paths into the Chroma collection.
|
||||
Each file is read, split into chunks, embedded, and stored.
|
||||
"""
|
||||
for file_path in file_paths:
|
||||
if not os.path.isfile(file_path):
|
||||
print(f"Skipping non-existent file: {file_path}")
|
||||
continue
|
||||
with open(file_path, "r", encoding="utf-8") as f:
|
||||
content = f.read()
|
||||
chunks = _split_text(content)
|
||||
embeddings = [_embed_text(chunk) for chunk in chunks]
|
||||
ids = [f"{os.path.basename(file_path)}_{i}" for i in range(len(chunks))]
|
||||
collection.add(
|
||||
ids = [doc["id"] for doc in documents]
|
||||
contents = [doc["content"] for doc in documents]
|
||||
embeddings = [doc["embedding"] for doc in documents]
|
||||
metadatas = [doc.get("metadata", {}) for doc in documents]
|
||||
|
||||
self.collection.add(
|
||||
ids=ids,
|
||||
documents=chunks,
|
||||
embeddings=embeddings
|
||||
documents=contents,
|
||||
embeddings=embeddings,
|
||||
metadatas=metadatas,
|
||||
)
|
||||
print(f"Ingested {len(chunks)} chunks from {file_path}.")
|
||||
|
||||
def similarity_search(
|
||||
self, query_embedding: List[float], k: int = 5
|
||||
) -> Dict[str, List[Any]]:
|
||||
"""
|
||||
Perform a similarity search against the collection.
|
||||
|
||||
def get_relevant_chunks(query: str, k: int = 5) -> List[Tuple[str, str]]:
|
||||
Args:
|
||||
query_embedding: Embedding vector of the query.
|
||||
k: Number of nearest neighbors to return.
|
||||
|
||||
Returns:
|
||||
Dictionary containing ids, documents, distances, and metadatas.
|
||||
"""
|
||||
Retrieve top-k relevant chunks for a query.
|
||||
Returns a list of tuples (chunk_id, chunk_text).
|
||||
"""
|
||||
query_embedding = _embed_text(query)
|
||||
results = collection.query(
|
||||
results = self.collection.query(
|
||||
query_embeddings=[query_embedding],
|
||||
n_results=k,
|
||||
include=["documents", "ids"]
|
||||
)
|
||||
ids = results["ids"][0]
|
||||
docs = results["documents"][0]
|
||||
return list(zip(ids, docs))
|
||||
return results
|
||||
+84
-49
@@ -1,65 +1,100 @@
|
||||
import os
|
||||
import re
|
||||
"""
|
||||
Utility functions for performing web searches, fetching content, and ingesting
|
||||
the results into the RAG agent's vector store.
|
||||
"""
|
||||
|
||||
import uuid
|
||||
import requests
|
||||
from bs4 import BeautifulSoup
|
||||
from typing import List
|
||||
from typing import List, Dict
|
||||
|
||||
# DuckDuckGo search URL
|
||||
DDG_SEARCH_URL = "https://duckduckgo.com/html/"
|
||||
from src.rag_agent import RAGAgent
|
||||
|
||||
def _extract_text_from_html(html: str) -> str:
|
||||
"""
|
||||
Extract visible text from HTML, removing scripts and styles.
|
||||
"""
|
||||
soup = BeautifulSoup(html, "html.parser")
|
||||
for script in soup(["script", "style"]):
|
||||
script.decompose()
|
||||
text = soup.get_text(separator="\n")
|
||||
lines = (line.strip() for line in text.splitlines())
|
||||
chunks = [phrase.strip() for phrase in lines if phrase.strip()]
|
||||
return "\n".join(chunks)
|
||||
|
||||
def search_web(query: str, num_results: int = 3) -> List[str]:
|
||||
def perform_search(query: str, num_results: int = 3) -> List[Dict[str, str]]:
|
||||
"""
|
||||
Perform a web search using DuckDuckGo and return the top num_results snippets.
|
||||
Perform a web search using DuckDuckGo's HTML interface.
|
||||
|
||||
Args:
|
||||
query: Search query string.
|
||||
num_results: Number of search results to return.
|
||||
|
||||
Returns:
|
||||
List of dictionaries containing 'title' and 'url' keys.
|
||||
"""
|
||||
params = {
|
||||
"q": query,
|
||||
"s": "0",
|
||||
"dc": "0",
|
||||
"kl": "us-en",
|
||||
"kp": "-2",
|
||||
"kp": "-2",
|
||||
"kp": "-2",
|
||||
"kp": "-2",
|
||||
}
|
||||
headers = {
|
||||
"User-Agent": "Mozilla/5.0 (compatible; RAG-Agent/1.0; +https://example.com/bot)"
|
||||
}
|
||||
try:
|
||||
response = requests.get(DDG_SEARCH_URL, params=params, headers=headers, timeout=10)
|
||||
search_url = "https://duckduckgo.com/html/"
|
||||
params = {"q": query}
|
||||
response = requests.get(search_url, params=params, timeout=10)
|
||||
response.raise_for_status()
|
||||
except requests.RequestException as e:
|
||||
print(f"Web search request failed: {e}")
|
||||
return []
|
||||
|
||||
soup = BeautifulSoup(response.text, "html.parser")
|
||||
results = []
|
||||
for a in soup.select("a.result__a"):
|
||||
for a in soup.select("a.result__a")[:num_results]:
|
||||
title = a.get_text(strip=True)
|
||||
href = a.get("href")
|
||||
if href:
|
||||
results.append(href)
|
||||
if len(results) >= num_results:
|
||||
break
|
||||
results.append({"title": title, "url": href})
|
||||
return results
|
||||
|
||||
snippets = []
|
||||
for url in results:
|
||||
|
||||
def fetch_content(url: str) -> str:
|
||||
"""
|
||||
Fetch the textual content of a web page.
|
||||
|
||||
Args:
|
||||
url: URL of the page to fetch.
|
||||
|
||||
Returns:
|
||||
Extracted text content.
|
||||
"""
|
||||
response = requests.get(url, timeout=10)
|
||||
response.raise_for_status()
|
||||
soup = BeautifulSoup(response.text, "html.parser")
|
||||
|
||||
# Remove scripts, styles, and navigation elements
|
||||
for element in soup(["script", "style", "noscript", "header", "footer", "nav"]):
|
||||
element.decompose()
|
||||
|
||||
text = soup.get_text(separator=" ", strip=True)
|
||||
return text
|
||||
|
||||
|
||||
def ingest_search_results(
|
||||
agent: RAGAgent, query: str, num_results: int = 3
|
||||
) -> List[Dict[str, str]]:
|
||||
"""
|
||||
Perform a web search, fetch content for each result, and ingest it into
|
||||
the vector store via the provided RAGAgent.
|
||||
|
||||
Args:
|
||||
agent: Instance of RAGAgent to ingest documents.
|
||||
query: Search query string.
|
||||
num_results: Number of search results to process.
|
||||
|
||||
Returns:
|
||||
List of search result metadata dictionaries.
|
||||
"""
|
||||
search_results = perform_search(query, num_results)
|
||||
docs_to_ingest = []
|
||||
|
||||
for result in search_results:
|
||||
url = result.get("url")
|
||||
title = result.get("title", "")
|
||||
try:
|
||||
page_resp = requests.get(url, headers=headers, timeout=10)
|
||||
page_resp.raise_for_status()
|
||||
snippet = _extract_text_from_html(page_resp.text)[:500] # limit snippet size
|
||||
snippets.append(snippet)
|
||||
except requests.RequestException:
|
||||
continue
|
||||
content = fetch_content(url)
|
||||
except Exception:
|
||||
content = ""
|
||||
|
||||
return snippets
|
||||
doc_id = str(uuid.uuid4())
|
||||
docs_to_ingest.append(
|
||||
{
|
||||
"id": doc_id,
|
||||
"content": content,
|
||||
"metadata": {"source": url, "title": title},
|
||||
}
|
||||
)
|
||||
|
||||
if docs_to_ingest:
|
||||
agent.ingest(docs_to_ingest)
|
||||
|
||||
return search_results
|
||||
Reference in New Issue
Block a user