Python_API_String Services_re.compile

API文档：

re.compile(pattern[, flags])
Compile a regular expression pattern into a regular expression object, which can be used for matching using its match() and search() methods, described below.

The expression’s behaviour can be modified by specifying a flags value. Values can be any of the following variables, combined using bitwise OR (the | operator).

翻译文档：

   参数：

       pattern:正则表达式字符串

       [flags]：标志对正则表达式进行小处理

  描述：

        方法返回一个正则表达式对象，可直接调用match()和search()方法

例子：

  #! /usr/bin/env python
#coding=utf-8

import re

patternRe = re.compile('^AA')
print patternRe.search('AAbbb')

输出：

<_sre.SRE_Match object at 0x016490C8>