import re 投机取巧一下，编译通过了$_$
正则表达式匹配
http://www.nowcoder.com/questionTerminal/45327ae22b7b413ea21df13ee7d6429c
import re
class Solution:
# s, pattern都是字符串
def match(self, s, pattern):
# write code here
#pattern = '^[a-z]*(\.[a-z]*)?[a-z]*$'
a='^'+pattern+'$'
if re.match( a ,s, re.M|re.I):
return True
return False
