Python 实现域名解析为ip的方法

from multiprocessing import Process,Queue,Pool
import socket
import multiprocessing
import os 
 
#写入文件
def write(q,lock，filename):
 while not q.empty():
  url = q.get()
  print (url)
  try:
   ip = socket.gethostbyname(url)
  except:
   ip = "unknow"
  print (ip)
  with open(filename,'a+') as f:
   lock.acquire()      #加锁防止多个进程写入会混乱
   try:
    f.write(url + " " + ip + "\n")
   finally:
    lock.release()
 
#添加到队列
def readurl(q,n):
 with open(str(n)+'.txt','r') as f:
  lines = f.readlines()
  for line in lines:
   q.put(line.strip())
 return q
 
#根据进程进行拆分txt
def multi(urllist,n):
 with open(urllist,'r') as f:
  lines = f.readlines()
  line = int(len(lines)/n)
  print (line)
  for m in range(0,n):
   with open(str(m)+'.txt','a+') as f1:
    for i in range(line*m,line*(m+1)):
     f1.write(lines[i])
 
#删除拆分的txt文件
def remove(n):
 for i in range(0,n):
  os.remove(str(i)+'.txt')
 print ("######清除临时文件######")
 
 
if __name__ == "__main__":
 
 manager = multiprocessing.Manager()
 q = manager.Queue()
 lock = manager.Lock()
 m = 5       #设置扫描进程数
 urllist = "url.txt"    #待解析的url
 filename = "test.txt"   #结果保存的文件名
 multi(urllist,m)
 p = Pool(m)
 for i in range(m):
  p.apply_async(write,args=(readurl(q,i),lock,filename))
 p.close()
 p.join()
 
 remove(m)
 
 print ("#######全部文件采集完成########")