20多个Python项目的讲解与实践，可以帮助读者从代码级别理解和掌握使用Python 编写若干方面应用的实践经验。 This book provides you with the chance to study how 26 experienced programmers think when they are building something new. The programs you will read about in this book were all written from scratch to solve difficult problems. A web server, a pedometer, a Python interpreter, a web-based spreadsheet, and many more applications are written, in 500 lines of code or less, and described by their creators so that you can learn from their insights and their mistakes.