Python Language and Its Applications

This book is the Chinese edition of O'Reilly's classic Python introduction Introducing Python, written by Bill Lubanovic and based on Python 3.x, aimed at programming beginners while also accommodating readers with a background in other languages. Structurally, the book is divided into two major parts, "Python Basics" and "Python in Practice": the former explains core syntax and data structures progressively, including variables and names, numbers, if statements, strings, while and for loops, tuples and lists, dictionaries and sets, functions, objects and classes, and modules and packages; the latter applies language knowledge to practical scenarios, covering data processing, calendars and clocks, files and directories, processes and concurrency, data persistence, network programming, web development, and Python's applications in art, work, and scientific computing, and discusses Python's distinctive coding style and idioms. The author combines tutorials with "cookbook"-style examples, and each chapter includes exercises and reference answers, helping readers learn by doing, build a complete Python knowledge system, and use the standard library and excellent third-party packages to solve real problems. Suitable for readers who want a systematic introduction to Python 3 and quick application experience.