Python正则表达式

import re
print re.match("www","www.baidu.com").span()#(0,3)

import re
line = "Cats are smarter than dogs"
matchObj = re.match(r‘(.*) are (.*?) .*‘,line,re.M | re.I)

if matchObj:
    print matchObj.group()#Cats are smarter than dogs
    print matchObj.group(1)#Cats
    print matchObj.group(2)#smarter

import re
print re.search("com","www.baidu.com").span()#(10, 13)

import re
phone = "2004-959-559 # This is Phone Number"
num = re.sub(r‘#.*$‘,"",phone)
print "Phone Num:",num#Phone Num: 2004-959-559
num = re.sub(r‘\D‘,"",phone)
print "Phone Num:",num#Phone Num: 2004959559