How I Built My First RAG App from Scratch with Python

📰 Medium · Data Science

Learn to build a simple Retrieval-Augmented Generation app from scratch using Python and tools like ChromaDB, Qwen, and OpenRouter

beginner Published 27 May 2026
Action Steps
  1. Install ChromaDB and set up a local database to store your data
  2. Use Qwen to preprocess and prepare your dataset for training
  3. Configure OpenRouter to connect to your database and enable querying
  4. Build a simple RAG model using Python and integrate it with ChromaDB and OpenRouter
  5. Test and evaluate your RAG app using sample queries and datasets
Who Needs to Know This

Data scientists and engineers can benefit from this tutorial to build their first RAG app and explore its applications in natural language processing

Key Insight

💡 RAG apps can be built using a combination of specialized tools like ChromaDB, Qwen, and OpenRouter, and Python programming

Share This
🚀 Build your first RAG app from scratch with Python! 🤖

Full Article

A beginner-friendly tutorial using ChromaDB, Qwen, and OpenRouter to build a simple Retrieval-Augmented Generation app. Continue reading on Medium »
Read full article → ← Back to Reads

Related Videos

This FREE Tool Turns ANY PDF into Perfect Markdown (MinerU Live Test)
This FREE Tool Turns ANY PDF into Perfect Markdown (MinerU Live Test)
Prompt Engineer
RRF vs DBSF with Qdrant: Hybrid Retrieval Fusion for RAG in Python
RRF vs DBSF with Qdrant: Hybrid Retrieval Fusion for RAG in Python
Professor Py: AI Engineering
Why You Can't Learn AI Engineering All at Once 2026
Why You Can't Learn AI Engineering All at Once 2026
Tech With Tim
The Local AI Backup To Survive Any Model Ban
The Local AI Backup To Survive Any Model Ban
Zen van Riel
AI Agents Are Finally Production-Ready — Here's What Changed — Interview
AI Agents Are Finally Production-Ready — Here's What Changed — Interview
Prompt Engineering
40 LPA Series Day 60 | Advanced RAG Tutorial | LangChain, ChromaDB & Vector Database Explained
40 LPA Series Day 60 | Advanced RAG Tutorial | LangChain, ChromaDB & Vector Database Explained
CodeWithPrashant