Here is a short introduction to pythons For Loop. You will use this piece of code in 99 % of your scripts. It is important to understand the power of for loops, so the next video will expand a little on it as well before moving on to conditions. But in this video you will see a simple example of how it can be used to optimise a rigging process. Here you can really see the power of scripting and avoiding repetitive work. Which is ultimately the reason why we use python. We are trying to make our workflow faster so we can get pass the connection work and focus on the better parts of rigging. Such as deformation and so on, and also if we end up with a great arm module we can rebuild it in seconds next time and start making it better instead of starting over every time.