Head First Python 2e

Product Information

become a favourite in the rapidly growing collection of great Python guides. The content is structured To understand what has happened here, consider that the above line of code is an assignment statement. Here’s what happens during assignment: the code to the right of the = symbol is executed first, and then whatever value is created has its object reference assigned to the variable on the left of the = symbol. Executing the code arg * 2 creates a new value, which is assigned a new object reference, which is then assigned to the arg variable, overwriting the previous object reference stored in arg in the function’s suite. However, the “old” object reference still exists in the calling code and its value hasn’t changed, so the shell still sees the original list, not the new doubled list created in Tom’s code. Contrast this behavior to Sarah’s code, which calls the append method on an existing list. As there’s no assignment here, there’s no overwriting of object references, so Sarah’s code changes the list in the shell, too, as both the list referred to in the functions’ suite and the list referred to in the calling code have the same object reference.

If you simply import a module—for example, import time—you then need to qualify the usage of any of the module’s functions with the module name, like so: time.sleep(). subjects like collections and immutability. If you’re looking for a great introduction to Python, then this Chapter 8: Design Principles — Do not re-invent the wheel and find solutions to problems that have already been solved. This chapter is about design principles that help you work smarter and faster.• The language is relevant for such a wide variety of tasks, and evolves so much that there will always be something new to discover and learn.

Definition and Usage

Python: Sure. At my core, I’m a plain-ol’ general purpose programming language, which can be put to many uses. I’m equally happy running your latest webapp as I am running on the Mars Rover. It’s all just code to me. Beautifully formatted, easy to read, code. That’s what it’s all about. Despite its name, this book is an excellent choice for people who don’t have experience with physics, research, or computational problems.

Chapter 3: Optimization — This chapter is about learning about tweakingg our decision variables to find either the solution or optimal point where we get the most of what we want.• Python: I don’t think I’m all that different from most other programming languages. I do variables, loops, conditionals, functions, and so on, just like all the others.What I like best about this book is its large number of programming challenges, as well as the excellent summaries at the end of each chapter reminding you what was covered. As the title says, the goal of this book is to teach you how coders think about coding, and it does a good job of it. Compared to the other books, it’s drier and organized in a more linear way. The book focuses on everything you need to know about basic Python programming, in a very straightforward, clear, and comprehensive way. The next project is a text-based cave exploration game, Dragon’s Realm, which introduces you to flowcharts and functions, guides you through how to define your own arguments and parameters, and explains Boolean operators, global and local scope, and the sleep() function.

Chapter 2: Organizations, Constraints, and Projects — This chapter talks about the different types of organizations and which type you should look for in a new job.• In addition to being a great learning resource, this book will also serve as an excellent Python reference, as the topics are well organized with plenty of interspersed examples and exercises.

Head First Agile is a book that teaches agile and its most popular methodologies. The book also serves as prep for the PMI Agile Certified Practitioner credential. In my time working in the software industry, I have been exposed to Scrum, XP, Lean, and individual team’s “own flavor” of agile. If you have any intention of joining a software team in the future, this book is great for preparing your mind and your expectations. Chapter 8: Professional responsibility — This chapter discusses your role as an individual on your team. A healthy team and product ultimately boils down to the individual level, so this chapter discusses personal responsibility and doing the right thing. Python comes with a powerful standard library, which provides access to lots of reusable modules (of which datetime is just one example). Pythonic programming takes advantage of how the Python language is implemented to maximize the efficiency of your code. Chapter 5: (Part 1) Good Design = Flexible Software — Nothing ever stays the same, which is why software must be designed to be flexible. Your software is going to keep changing and responding to customers needs. The chapter talks about improving an existing software project.•