Python has a wonderfully simple syntax, deceptively so, however do not mistake its simplicity for lack of power, for Python is a powerful language, but there are a few rules and your author is a very opinionated developer, at first do things his way, then, as you gain experience, you can develop your own ways and become just as opinionated, but if nothing else informed about the opinions of other developers and you can be an informed, opinionated developer!

First thing any developer new to Python must know, spaces in Python is significant and indentation controls the flow of the program, four space indentation, or one tab, but always insert spaces.