说明：  本书是一本面向实践的 Python 编程实用指南。本书的目的，不仅是介绍 Python 语言的基础知识，而且还通过项目实践教会读者如何应用这些知识和技能
(This book is a practical python programming practical guide. The purpose of this book is not only to introduce the basics of the python language, but also to teach readers how to apply these knowledge and skills through project practice.)