python socket模块打印dns查询的例子

#!/usr/bin/python
#site: www.jb200.com
#
import socket

def gethost_ex(host_ex):
        hostname_ex,alias_ex,address_ex = socket.gethostbyname_ex(host_ex)
        return hostname_ex,alias_ex,address_ex
def array_print(*arr):
        for item in arr:
                print '  ',item
        print

for host in ["www.baidu.com","www.jb200.com","www.google.com"]:
        print host
        try :
                hostname,alias,address = gethost_ex(host)
        except socket.error as e:
                print 'error',e
                continue
        print ' HostName:',hostname
        print ' Alias:'
        array_print(*alias)
        print ' Address:'
        array_print(*address)