دانلود کتاب کار پایتون، ویرایش سوم

I believe that computer programming is a skill that is best learned by doing. While it is valuable to read about programming, and to watch a teacher create a program at the front of a classroom, it is far more important to spend time at the keyboard solving problems and putting the concepts you have been introduced to into practice. This book was written with this principle in mind. The majority of its pages are dedicated to exercises and their solutions, with only a few pages at the beginning of each chapter that concisely introduce the necessary concepts. There are 212 exercises in this book, which span a variety of academic disciplines and everyday situations. A few of the exercises are classical computer science problems, but most of them offer the opportunity to tackle problems from other fields of study and the world around you. Each exercise that you complete will strengthen your understanding of the Python programming language, improve your programming abilities, and allow you to tackle subsequent programming challenges more effectively. Solutions to approximately half of the exercises are provided in the second half of this book. If you become stuck on an exercise, a quick peek at my solution may help you work through your problem without requiring assistance from someone else. Many of the solutions include brief annotations that explain the approach used to solve the problem or highlight a specific point of Python syntax. You will find these annotations in shaded boxes, making it easy to distinguish them from the solutions themselves. I hope that you will take the time to compare your solutions with mine, even when you arrive at your solution without encountering any problems. Performing this comparison may reveal a flaw in your program, or help you become familiar with a technique that you could have used to solve the problem more easily. The solutions that I have provided also demonstrate good programming style, including appropriate comments, meaningful variable names, and minimal use of magic numbers. I encourage you to use good programming style when creating your solutions, so that they compute the correct result while also being clear, easy to understand, and amenable to future updates. The length of my solution has been included immediately after each exercise’s title. While you shouldn’t expect the length of your solution to match mine exactly, I hope that providing the length of my solution will prevent you from going too far astray before reconsidering your approach or seeking assistance. “Solved” appears immediately ahead of the solution’s length when my solution can be found in the second half of the book. This book can be used in a variety of ways. Its concise introductions to Python programming concepts, and extensive collection of exercises, allow it to be used as the lone textbook in an introductory programming course. It can also be used to supplement another textbook that includes only a limited selection of exercises. A motivated individual could teach themselves to program in Python using only this book. However, there are, perhaps, easier ways to learn the language because the concise introductions only cover each topic’s most important aspects, without examining every special case or unusual circumstance. No matter what other resources you use with this book, if any, reading its chapters, completing its exercises, and studying the provided solutions will enhance your programming ability.