python中正则表达式的应用

#!~/python2.5.2/bin/python

Import re

strPattern='^[a-zA-Z/.:]+([0-9]+)[a-zA-Z/.]+$'

strString='http://www.163.com'

m=re.match(strPattern, strString);

if m is not None:

m.group();

'http://www.163.com'

>>> strNum=m.group(1);

>>> strNum

'163'

>>> strOther=m.group(2);

Traceback (most recent call last):

File "<pyshell#11>", line 1, in <module>

strOther=m.group(2);

IndexError: no such group