说明：  可爱的python pdf中文版是一本Python语言详解书籍，由哲思社区编著，本书的内容主要来自CPyUG社区的邮件列表，由Python的行者根据自身经验组织而成，给初学者提供方便，帮助大家多快好省地完成功能。
(The lovely Chinese version of Python PDF is a python language explanation book, compiled by the philosophy community. The content of this book is mainly from the email list of cpyug community, organized by Python practitioners according to their own experience, which provides convenience for beginners and helps them to complete their functions more quickly and economically.)