Category Python Programming Examples

I ran into this problem when an e-commerce client asked why their best customers kept disappearing after month two. The obvious metrics told us nothing. What we needed was a way to watch user behavior unfold over time, which is…

I keep coming back to CSV files whenever I need to move data between systems. They are the simplest way to represent tabular data as plain text, and every system from databases to spreadsheets can read them. If you have…

I first played Flappy Bird on my phone and immediately wanted to build it myself. The original game is deceptively simple – tap to flap, avoid pipes, rack up a score. But once I started building it with Python and…

I ran into the least cost transportation problem again last week, this time when a small manufacturing client needed help cutting their shipping costs. They had three plants shipping to five distribution centers, and every route had a different price…

I keep coming back to CAPM whenever I need to explain to someone why some stocks are riskier than others. The model is simple enough to implement in an afternoon, but it captures something real about how the market prices…

I have seen the knapsack problem show up in quite a few technical interviews. It is one of those problems that feels tricky at first but becomes much clearer once you see the recursive pattern underneath. In this tutorial, I…

I keep coming back to base64 whenever I’m working with APIs, JWT tokens, or any system that needs to safely transmit binary data as text. The other day I needed to decode a webhook payload that came in as a…

I remember the first time I tried to build a predictive model in Python – I had data, I had a vague idea of what I wanted, but I had no clue how to connect those two things into something…

I have used sklearn’s train_test_split more times than I can count. But every now and then I run into a situation where I cannot install sklearn – maybe it is a restricted environment, maybe I am working on a pure…