re module example

re_exm

#coding:utf8

import re

def ex_1():
    s = 'aaabcbdbbbccc'
    pattern = r'(([a-z])\2{2})'
    pattern = r'([a-z])\1{2}'
    print 'pattern is :' + pattern
    print 'string is  :' + s
    return re.findall(pattern, s, re.I)

def ex_2():
    s = 'aaabcbbbbccc'
    pattern = r'([a-z])\1{2}'
    print 'pattern is :' + pattern
    print 'string is  :' + s
    o = re.match(pattern, s)
    return o.group()

if __name__ == '__main__':
    print ex_1()