说明：  本书介绍了Python应用在各个领域中的一些使用技巧和方法，从最基本的字符、文件序列、字典和排序，到进阶的面向对象编程、数据库和数据持久化、 XML处理和Web编程，再到比较高级和抽象的描述符、装饰器、元类、迭代器和生成器，均有涉及。书中还介绍了一些第三方包和库的使用，包括 Twisted、GIL、PyWin32等。
(This book introduces the Python application in various fields in the use of some skills and methods, from the most basic characters, file sequence, dictionary and sorting, to advanced object-oriented programming, database and data persistence, XML processing and Web programming, to more advanced and abstract descriptor, decorator, metaclass, iterators and generators, are involved. The book also describes the use of some third party packages and libraries, including Twisted, GIL, PyWin32 and so on.)