high volume/speed gethostbyaddr how?

[Dan Polak]

In article <mailman.1020445267.30722.python-list at python.org>, 
brueckd at tbye.com says...
> On Fri, 3 May 2002 brueckd at tbye.com wrote:
> 
> > import threading, socket
> > ipList = [... create a list of IP addresses ...]
> > ipAndHostList = []
> > 
> > def LookupThread():
> >   while 1:
> >     try:
> >       ip = ipList.pop()
> >       ipAndHostList.append((ip, socket.gethostbyaddr(ip)[0]))
> >     except IndexError:
> >       break
> > 
> > for i in range(3):
> >   threading.Thread(target=LookupThread).start()
> 
> Oops, also add:
> 
> import time
> while ipList:
>   time.sleep(0.1)

I tried it and it improves speed greatly.
Thank you very much!

Dan