关于python的正则表达式问题

[hanyuwei0]

我想通过正则表达式匹配的同时可以获取到相应的值，该怎么搞呢
比如:
s='asa02cid=333fsdf'
pattern=re.compile('.*cid=.*')
我想获得333

[bugs2k]

Python 2.7.3 (default, Apr 10 2012, 23:31:26) [MSC v.1500 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> import re
>>> s='asa02cid=333fsdf'
>>> m = re.search('=(\d+)', s)
>>> if m:
	print m.groups()

	
('333',)
>>>