for loops in Pandas? You're doing it wrong.

Still using `for` loops to process rows in Pandas? You're not alone — but you're also not doing it the right way. In this video, I show you just how much time you're wasting by looping over a data frame, and then how to fix it using Pandas' built-in vectorized operations. We'll compare two real examples side by side, showing the performance difference in Jupyter. This is one of the most common mistakes I see in my corporate Python training—and it’s an easy one to fix.