Lightweight-QA-Bot 🤖

A snappy, CPU-friendly chatbot that learns from your Q&A and responds in real-time! Built with Python, MiniBot uses Sentence Transformers for embeddings and cosine similarity to find the best match.

🌟 Features

• 🧠 Self-learning: Learns new Q&A on the fly and stores them in qa.csv.
• 🗣️ Text-to-Speech: Speaks answers using pyttsx3.
• 💾 Cached model: Downloads once from Hugging Face, loads instantly after.
• 🧩 Expandable: Add more Q&A to boost its brainpower.
• 🧘 CPU-friendly: Runs smoothly on laptops—no GPU needed!

⚙️ Installation

Clone the repository:

git clone https://github.com/goldstac/Lightweight-QA-Bot.git
cd Lightweight-QA-Bot

Install required Python modules:

pip install pandas scikit-learn pyttsx3 sentence-transformers numpy

💡 Note: CPU-friendly version. No TensorFlow or GPU required.

💬 Usage

• Make sure qa.csv exists (MiniBot will create it if missing).

• Run the chatbot:

  python index.py

• Chat with MiniBot!

  • Type a question and wait for a response.
  • If MiniBot doesn’t know the answer, it will ask you to teach it:
    • MiniBot: I don't know, can you teach me?
    • You (teach MiniBot): [Type your answer here]
    • MiniBot will remember it for next time.

• Type .exit or .quit to close the chatbot.

🧪 How It Works

1. Loads all Q&A pairs from qa.csv.
2. Converts questions into embedding vectors.
3. Finds the closest match using cosine similarity.
4. If similarity < 0.4, it asks you to teach it.
5. Saves new Q&A and updates embeddings dynamically.

🧾 Example

You » Hello

MiniBot » Hi there!

You » Who is Trump?

MiniBot » I don't know, can you teach me?

You (teach MiniBot)
∘ Donald Trump is the 47th president of the USA

MiniBot » Got it! I'll remember that.

You » Who is Trump?

MiniBot » Donald Trump is the 47th president of the USA

📦 Dependencies

• pandas
• scikit-learn
• pyttsx3
• sentence-transformers
• numpy

📜 License

MIT License — see LICENSE for details.
Feel free to fork, remix, and contribute! 🛠️

📝 Notes

• Model is cached locally in MinibotModelCache folder to avoid repeated downloads.
• Works fully on CPU; no GPU or TensorFlow needed.
• The more you teach MiniBot, the smarter it gets! 🧠💡