对Python正则匹配IP、Url、Mail的方法详解

如下所示：

"""
created on thu nov 10 14:07:36 2016


@author: qianzhewoniuqusanbu
"""
import re
def regularmatchip(ip):
    '''进行正则匹配ip，加re.ignorecase是让结果返回bool型'''
    pattern=re.match(r'\b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$',ip,re.ignorecase)
    if pattern:
        print ip
    else:
        print "the ip address format is incorrect!"
        

def regularmatchurl(url):
    pattern=re.match(r'(http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?',url,re.ignorecase)
    if pattern:
        print url
    else:
        print "invalid url"
        
        
def regularmatchemail(email):
     pattern=re.match(r'\w+@([0-9a-za-z]+[-0-9a-za-z]*)(\.[0-9a-za-z]+[-0-9a-za-z]*)+',email,re.ignorecase)
     if pattern:
         print email
     else:
         print "invalid eamil"


regularmatchip("12.32.35.23")      
regularmatchurl("http://c.biancheng.net/cpp/html/1435.html")
regularmatchemail("[e-mail]")

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