Using Google App Engine by Charles Severance Published by O’Reilly Media, Inc., May 2009: First Edition. In April 2008, Google announced a product called App Engine. When you write a program for the Web that runs on App Engine, your software runs on
The computing power that's available on the average desktop has exploded in the past few years. A typical PC has performance exceeding that of a multi-million dollar supercomputer a mere decade ago. To some people, that might mean that it's time to
1. Programming on the Web The Request/Response Cycle 3 What Is Google App Engine? 5 What Is a “Cloud”? 6 Why Did Google Build App Engine and Give It Away for Free? 7 What Is the Google Infrastructure Cloud? 8 Enter the Application Engine 9 Your Appl
This book is designed to introduce students to programming and computational thinking through the lens of exploring data. You can think of Python as your tool to solve problems that are far beyond the capability of a spreadsheet. It is an easy-to-us
It is quite natural for academics who are continuously told to “publish or perish”to want to always create something from scratch that is their own fresh creation.This book is an experiment in not starting from scratch, but instead “remixing”the boo
python4everybodyPreface
Remixing an Open Book
It is quite natural for academics who are continuously told to"publish or perish
to want to always create something from scratch that is their own fresh creation
This book is an experiment in not starting
较为全面的python教程，零基础小白进阶，基础操作知识出发学习python。Preface
Remixing an Open Book
It is quite natural for academics who are continuously told to "publish or perish
to want to always create something from scratch that is their own fresh creation
This book is an ex
正则表达式，又称正规表示法、常规表示法（英语：Regular Expression，在代码中常简写为regex、regexp或RE），计算机科学的一个概念。正则表达式使用单个字符串来描述、匹配一系列符合某个句法规则的字符串。在很多文本编辑器里，正则表达式通常被用来检索、替换那些符合某个模式的文本。
注：以下文章原文来自于Dr Charles Severance 的 《Python for Informatics》
目前为止，我们一直在通读文件，查找模式和抽取字里行间我们感兴趣的各种信息
注：以下文章原文来自于Dr Charles Severance 的 《Python for Informatics》
11.1 正则表达式的字符匹配
我们可以用许多其它的特殊字符创建更加强大的正则表达式。最常用的特殊符号是可匹配任何字符的句号(“.”)。在以下的示例中，正则表达式”F..m:“将匹配”From:”，“Fxxm:”，”F12m:“，或者”F!m:“等类似字符串，因为表达式中间的句号可匹配任何字符。
import re
hand = open('mbox-short.t
