title	emoji	colorFrom	colorTo	sdk	app_port	pinned	license
LLM Analysis Quiz Solver	🤖	blue	red	docker	7860	false	mit

🤖 LLM Analysis - Autonomous Quiz Solver Agent

An intelligent, autonomous agent built with LangGraph and LangChain that solves data-related quizzes involving web scraping, data processing, analysis, and visualization tasks. The system uses Google's Gemini 2.5 Flash model to orchestrate tool usage and make decisions.

📋 Table of Contents

• Overview
• Architecture
• Features
• Project Structure
• Installation
• Configuration
• Usage
• API Endpoints
• Tools & Capabilities
• Docker Deployment
• How It Works
• License

🔍 Overview

This project was developed for the TDS (Tools in Data Science) course project, where the objective is to build an application that can autonomously solve multi-step quiz tasks involving:

• Data sourcing: Scraping websites, calling APIs, downloading files
• Data preparation: Cleaning text, PDFs, and various data formats
• Data analysis: Filtering, aggregating, statistical analysis, ML models
• Data visualization: Generating charts, narratives, and presentations

The system receives quiz URLs via a REST API, navigates through multiple quiz pages, solves each task using LLM-powered reasoning and specialized tools, and submits answers back to the evaluation server.

🏗️ Architecture

The project uses a LangGraph state machine architecture with the following components:

┌─────────────┐
│   FastAPI   │  ← Receives POST requests with quiz URLs
│   Server    │
└──────┬──────┘
       │
       ▼
┌─────────────┐
│   Agent     │  ← LangGraph orchestrator with Gemini 2.5 Flash
│   (LLM)     │
└──────┬──────┘
       │
       ├────────────┬────────────┬─────────────┬──────────────┐
       ▼            ▼            ▼             ▼              ▼
   [Scraper]   [Downloader]  [Code Exec]  [POST Req]  [Add Deps]

Key Components:

1. FastAPI Server (main.py): Handles incoming POST requests, validates secrets, and triggers the agent
2. LangGraph Agent (agent.py): State machine that coordinates tool usage and decision-making
3. Tools Package (tools/): Modular tools for different capabilities
4. LLM: Google Gemini 2.5 Flash with rate limiting (9 requests per minute)

✨ Features

• ✅ Autonomous multi-step problem solving: Chains together multiple quiz pages
• ✅ Dynamic JavaScript rendering: Uses Playwright for client-side rendered pages
• ✅ Code generation & execution: Writes and runs Python code for data tasks
• ✅ Flexible data handling: Downloads files, processes PDFs, CSVs, images, etc.
• ✅ Self-installing dependencies: Automatically adds required Python packages
• ✅ Robust error handling: Retries failed attempts within time limits
• ✅ Docker containerization: Ready for deployment on HuggingFace Spaces or cloud platforms
• ✅ Rate limiting: Respects API quotas with exponential backoff

📁 Project Structure

LLM-Analysis-TDS-Project-2/
├── agent.py                    # LangGraph state machine & orchestration
├── main.py                     # FastAPI server with /solve endpoint
├── pyproject.toml              # Project dependencies & configuration
├── Dockerfile                  # Container image with Playwright
├── .env                        # Environment variables (not in repo)
├── tools/
│   ├── __init__.py
│   ├── web_scraper.py          # Playwright-based HTML renderer
│   ├── code_generate_and_run.py # Python code executor
│   ├── download_file.py        # File downloader
│   ├── send_request.py         # HTTP POST tool
│   └── add_dependencies.py     # Package installer
└── README.md

📦 Installation

Prerequisites

• Python 3.12 or higher
• uv package manager (recommended) or pip
• Git

Step 1: Clone the Repository

git clone https://github.com/saivijayragav/LLM-Analysis-TDS-Project-2.git
cd LLM-Analysis-TDS-Project-2

Step 2: Install Dependencies

Option A: Using uv (Recommended)

Ensure you have uv installed, then sync the project:

# Install uv if you haven't already  
pip install uv

# Sync dependencies  
uv sync
uv run playwright install chromium

Start the FastAPI server:

uv run main.py

The server will start at http://0.0.0.0:7860.

Option B: Using pip

# Create virtual environment
python -m venv venv
.\venv\Scripts\activate  # Windows
# source venv/bin/activate  # macOS/Linux

# Install dependencies
pip install -e .

# Install Playwright browsers
playwright install chromium

⚙️ Configuration

Environment Variables

Create a .env file in the project root:

# Your credentials from the Google Form submission
EMAIL=[email protected]
SECRET=your_secret_string

# Google Gemini API Key
GOOGLE_API_KEY=your_gemini_api_key_here

Getting a Gemini API Key

1. Visit Google AI Studio
2. Create a new API key
3. Copy it to your .env file

🚀 Usage

Local Development

Start the FastAPI server:

# If using uv
uv run main.py

# If using standard Python
python main.py

The server will start on http://0.0.0.0:7860

Testing the Endpoint

Send a POST request to test your setup:

curl -X POST http://localhost:7860/solve \
  -H "Content-Type: application/json" \
  -d '{
    "email": "[email protected]",
    "secret": "your_secret_string",
    "url": "https://tds-llm-analysis.s-anand.net/demo"
  }'

Expected response:

{
  "status": "ok"
}

The agent will run in the background and solve the quiz chain autonomously.

🌐 API Endpoints

POST /solve

Receives quiz tasks and triggers the autonomous agent.

Request Body:

{
  "email": "[email protected]",
  "secret": "your_secret_string",
  "url": "https://example.com/quiz-123"
}

Responses:

Status Code	Description
200	Secret verified, agent started
400	Invalid JSON payload
403	Invalid secret

GET /healthz

Health check endpoint for monitoring.

Response:

{
  "status": "ok",
  "uptime_seconds": 3600
}

🛠️ Tools & Capabilities

The agent has access to the following tools:

1. Web Scraper (get_rendered_html)

• Uses Playwright to render JavaScript-heavy pages
• Waits for network idle before extracting content
• Returns fully rendered HTML for parsing

2. File Downloader (download_file)

• Downloads files (PDFs, CSVs, images, etc.) from direct URLs
• Saves files to LLMFiles/ directory
• Returns the saved filename

3. Code Executor (run_code)

• Executes arbitrary Python code in an isolated subprocess
• Returns stdout, stderr, and exit code
• Useful for data processing, analysis, and visualization

4. POST Request (post_request)

• Sends JSON payloads to submission endpoints
• Includes automatic error handling and response parsing
• Prevents resubmission if answer is incorrect and time limit exceeded

5. Dependency Installer (add_dependencies)

• Dynamically installs Python packages as needed
• Uses uv add for fast package resolution
• Enables the agent to adapt to different task requirements

🐳 Docker Deployment

Build the Image

docker build -t llm-analysis-agent .

Run the Container

docker run -p 7860:7860 \
  -e EMAIL="[email protected]" \
  -e SECRET="your_secret_string" \
  -e GOOGLE_API_KEY="your_api_key" \
  llm-analysis-agent

Deploy to HuggingFace Spaces

1. Create a new Space with Docker SDK
2. Push this repository to your Space
3. Add secrets in Space settings:
   • EMAIL
   • SECRET
   • GOOGLE_API_KEY
4. The Space will automatically build and deploy

🧠 How It Works

1. Request Reception

• FastAPI receives a POST request with quiz URL
• Validates the secret against environment variables
• Returns 200 OK and starts the agent in the background

2. Agent Initialization

• LangGraph creates a state machine with two nodes: agent and tools
• The initial state contains the quiz URL as a user message

3. Task Loop

The agent follows this loop:

┌─────────────────────────────────────────┐
│ 1. LLM analyzes current state           │
│    - Reads quiz page instructions       │
│    - Plans tool usage                   │
└─────────────────┬───────────────────────┘
                  ▼
┌─────────────────────────────────────────┐
│ 2. Tool execution                       │
│    - Scrapes page / downloads files     │
│    - Runs analysis code                 │
│    - Submits answer                     │
└─────────────────┬───────────────────────┘
                  ▼
┌─────────────────────────────────────────┐
│ 3. Response evaluation                  │
│    - Checks if answer is correct        │
│    - Extracts next quiz URL (if exists) │
└─────────────────┬───────────────────────┘
                  ▼
┌─────────────────────────────────────────┐
│ 4. Decision                             │
│    - If new URL exists: Loop to step 1  │
│    - If no URL: Return "END"            │
└─────────────────────────────────────────┘

4. State Management

• All messages (user, assistant, tool) are stored in state
• The LLM uses full history to make informed decisions
• Recursion limit set to 200 to handle long quiz chains

5. Completion

• Agent returns "END" when no new URL is provided
• Background task completes
• Logs indicate success or failure

📝 Key Design Decisions

1. LangGraph over Sequential Execution: Allows flexible routing and complex decision-making
2. Background Processing: Prevents HTTP timeouts for long-running quiz chains
3. Tool Modularity: Each tool is independent and can be tested/debugged separately
4. Rate Limiting: Prevents API quota exhaustion (9 req/min for Gemini)
5. Code Execution: Dynamically generates and runs Python for complex data tasks
6. Playwright for Scraping: Handles JavaScript-rendered pages that requests cannot
7. uv for Dependencies: Fast package resolution and installation

📄 License

This project is licensed under the MIT License. See the LICENSE file for details.

---

Author: Sathish Kesavan Course: Tools in Data Science Institution: IIT Madras