Python：DNS查询：Pydns？挖？插座？

Question

我想写一个python脚本，将采取一系列主机名命令行参数并执行dns查询。如果查询成功，则不会发生，否则将抛出异常。以下是我迄今为止：

#!/usr/bin/env python 

    import socket 
    import sys, os 
    import DNS 

    if len(sys.argv) <=3: 
     print >>sys.stderr, 'usage:DnsCheck <hostname> <hostname> <hostname>' 
     sys.exit(2) 
    args = str(sys.argv[1:]) 
    command = "dig " + args 

    def main(args): 
     try: 
     for i in args: 
     #socket.gethostbyname(i) 
     os.popen(command) 
    except socket.error, e: 
     print e 

    if __name__ == '__main__': 
     main(args) 

Answer 1

import socket 
import sys 

def main(): 
    if len(sys.argv) < 2: 
     print("Usage: dnscheck hostname [hostname...]") 
    else: 
     for host in sys.argv[1:]: 
      try: 
       ip = socket.gethostbyname(host) 
       print("{} resolves to {}".format(host, ip)) 
      except socket.gaierror: 
       print("Could not resolve {}".format(host)) 

if __name__=="__main__": 
    main()