# How I Built a Retail Demand Forecasting App with Python and Streamlit

By Okparaji Wisdom | Data Scientist | Nigeria Retailers in Nigeria lose millions of naira every year to two problems: stockouts (shelves go empty, customers leave) and overstock (too much inventory, capital tied up, goods expire). Both are avoidable with data. So I built DemandForecast AI — a machine learning–powered app that predicts weekly product demand up to 26 weeks ahead, across 20 products in 4 retail categories. In this article I'll walk you through exactly how I built it, the tech...