Professional Python

Professional Python is one volume of the English-language bestseller series of the same name. The original Professional Python was written by veteran Python developer Luke Sneeringer, and the simplified Chinese edition was translated by Song Yunjian and Liu Lei and published by Tsinghua University Press in November 2016. The book does not start with variables and loops; it assumes readers can already write working Python scripts and focuses on the language mechanisms that everyday tutorials skip over but real projects use every day: how decorators take effect in order, why call signatures matter when decorators take arguments, how context managers behind the with statement clean up resources and handle exceptions, and how generators and iterators process—even infinite—data streams in slices. Part Two turns to classes and the object model: how magic methods take over operator overloading and type conversion, how type and metaclasses intervene at class creation, what kinds of runtime attribute problems class factories solve, and how abstract base classes use register and __subclasshook__ to declare "virtual subclasses" and protocols. Part Three tackles old data-layer problems: how Python 2 byte strings differ from Python 3 text strings, why non-ASCII characters and various encodings are not mutually compatible, and how to use regex grouping, lookahead, substitution, and precompilation. The final part leans toward engineering practice: differences and cross-version compatibility strategies between Python 2 and 3, unit testing and mocking, command-line tools optparse and argparse, and the then-new asyncio—event loops, coroutines, Futures and Tasks, callbacks, queues, and servers. The book uses "when to use it, when not to" as its thread, with runnable example code, helping readers organize scattered language features into maintainable architecture. The original was written around Python 3.5, so some material on version compatibility and async patterns is behind current practice; read it alongside current documentation.