Understanding how Python understands the world brings us to "dictionaries", which are kind of like lists, but they allow more variety and structure. This module will build up to representing increasingly complex real world things. We will build up to looking under the hood of a single tweet, and understanding the "social" in "social media".

Everything you've learned in this course about Python is just basic building blocks that programmers use to build bigger building blocks of their own. In this module, we'll do precisely that, turning Python into a little language for drawing pictures, a DIY MS Paint.

A major part of programming that no one ever tells you about is "debugging": spending seconds, minutes, hours, or even days going through code that should work to understand why it doesn't. This demoralizing subject stops a lot of beginners, but there is a way to be good at it, and that is a major part of learning to think the way code thinks.