本文研究的是re模块findall()函数的相关内容，首先看看实例代码：
>>> import re
>>> s = adfad asdfasdf asdfas asdfawef asd adsfas
>>> reObj1 = re.compile('((\w+)\s+\w+)')
>>> reObj1.findall(s)
[('adfad asdfasdf', 'adfad'), ('asdfas asdfawef', 'asdfas'), ('asd adsfas', 'asd')]
>>> reObj2 = re.compile('(\w+)\s+\w+')
>>> reO
