text: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  __author__ = '花一'
  
  #导入re模块
  import re
  
  #匹配如下内容:单词+空格+单词+任意字符
  m = re.match(r'(\w+) (\w+)(?P.*)','hello world')
  
  print "m.string:",m.string
  print "m.re:",m.re
  print "m.pos:",m.pos
  print "m.endpos:",m.endpos
  print "m.lastindex:",m.lastindex
  print "m.lastgroup:",m.lastgroup
  print "m.group():",m.group()
  print "m.group(1,2):",m.group(1,2)
  print "m.groups():",m.groups()
  print "m.groupdict():",m.groupdict()
  print "m.start(2):",m.start(2)
  print "m.end(2):",m.end(2)
  print "m.span(2):",m.end(2)
  print r"m.expand(r'\g \g\g'):",m.expand(r'\2 \1\3')