python 编写正则

python 编写正则使用RE Modules

手机号码验证

import re
m = re.compile("^\d{7,13}$")
print m.match("18181818")
print m.match("1515")

k= re.compile(u"^(www*|m*)")
print k.search("wwww.f.duitang.com.log").group()

#!/usr/bin/python
import re
str = '1screen12@dsfdsfdsf3" sdf'
#pattern = re.compile('screen.*') 之前写错了
pattern = re.compile('scree\w*\"') #这才是正确的
result = pattern.search(str)
print result;

import re
list = []
f = open("log","r") 
post = re.compile("[POST|GET] /[a-zA-Z0-9/?&]*")
hc = re.compile("HTTP/1.1\" \d*")
ma = re.compile("192.168.172.\d+:7199 [0-9.]*")

for read in f.readlines():
	match =  post.search(read)
	if match:
		g = str(match.group()).replace("T","")
		list.append(g)

	match = hc.search(read)
	if match:
		g = str(match.group()).replace("HTTP/1.1\"","")
		list.append(g)
	
	match = ma.search(read)
	if match:
		g = str(match.group())[18:]
		list.append(g)

	list.append("\n")

print " ".join(list)

输出 <_sre.SRE_Match object at 0xb720e528>

返回的这个对象是 MatchObject ，包含的方法有group()等： http://docs.python.org/release/2.2.3/lib/match-objects.html


除了使用search方法还有findAll方法，相关文档可以参考：
http://lukejin.iteye.com/blog/608206
http://epydoc.sourceforge.net/stdlib/index.html