Chatbot NiceGUI

A multi-session chatbot web application built with Python. I created this project based on Nicegui chatbot implementation as a prototype to have the following technologies working together:

• NiceGUI for a responsive, interactive web UI
• LangChain and langchain_openai for LLM integration (OpenAI GPT-4o)
• Persistent chat history and multi-chat session management
• AI-generated chat titles for each conversation
• Markdown-formatted answers (supports code, links, etc.)

This chatbot is good for study, learning, and experimenting with conversational AI and prompt engineering.

Features

• Simple chat interface with NiceGUI
• Multi-chat support: switch between previous conversations
• Persistent chat history (saved to disk)
• AI-generated short titles for each chat
• Markdown rendering for both user and AI messages
• Secure API key loading from .env
• Modular, maintainable codebase

Installation

1. Clone this repository.
2. Install dependencies:

   pip install -r requirements.txt

3. Create a .env file in the project root with your OpenAI API key:

   OPENAI_API_KEY=your_openai_api_key_here

4. Run the app:

   python main.py

Usage

• Start a new chat or select a previous chat from the sidebar.
• Type your message and press Enter.
• The conversation is saved automatically, and you can return to any previous chat.
• Each chat is given a short, AI-generated title for easy identification.
• All messages support markdown formatting.

Project Structure

• main.py — Entry point, sets up the NiceGUI page and launches the app
• chat_app.py — Contains the ChatApp class with all UI and logic
• chat_storage.py — Handles persistent chat storage and retrieval
• .env — Your OpenAI API key (not included in git)

Being Honest

Being honest, the docstrings in this project were generated with a little help from AI. 😄

Author

Bruno Villas Boas

License

MIT