"Speakers: Mica Swyers, Jay Chan This talk provides an introduction to rate tracking as well as an explanation of a particularly cool way to implement it. You will learn what rate tracking is, why you would want to do it, and then how you can use build a Redis-backed “velocity engine” in Python to do just that. Slides can be found at: https://speakerdeck.com/pycon2015 and https://github.com/PyCon/2015-slides"