Reverse Ip Lookup Mass & Fast

#!/usr/bin/python
import re , urllib , sys , os
from platform import system

#ReCoded By 7ourney
if system() == 'Linux':
    os.system('clear')
if system() == 'Windows':
    os.system('cls')

banner = '''
===================================================================|
===================================================================|
 /$$$$$$$$                                                         |
|_____ $$/                                                         |
     /$$//$$$$$$  /$$   /$$  /$$$$$$  /$$$$$$$   /$$$$$$  /$$   /$$|
    /$$//$$__  $$| $$  | $$ /$$__  $$| $$__  $$ /$$__  $$| $$  | $$|
   /$$/| $$  \ $$| $$  | $$| $$  \__/| $$  \ $$| $$$$$$$$| $$  | $$|
  /$$/ | $$  | $$| $$  | $$| $$      | $$  | $$| $$_____/| $$  | $$|
 /$$/  |  $$$$$$/|  $$$$$$/| $$      | $$  | $$|  $$$$$$$|  $$$$$$$|
|__/    \______/  \______/ |__/      |__/  |__/ \_______/ \____  $$|
                                                          /$$  | $$|
                                                         |  $$$$$$/|
                                                          \______/ |
                                                                   |
ReCoded By: 7ourney , FB.com/7ourney                               |
                                                                   |
===================================================================|
===================================================================|
\n'''
print banner

def ReverseBing():

 try:
    proxy = {'http':'http://199.102.45.110:80'}
    lists = open(sys.argv[1], 'r').readlines()
    for ips in lists:
      ip = ips.rstrip()
      bing = 'http://viewdns.info/reverseip/?host='+ip+'&t=1'
      openbing  = urllib.urlopen(bing,proxies=proxy)
      readbing = openbing.read()
      data = re.findall('</td></tr><tr> <td>(.*?)</td><td',readbing)
      print "Grabbed Domains[#]:", ip,'\n','[+] Found Sites :',len(data),'\n',
      open('sites.txt', "a").write("\n"+"\n".join(data))
 except:
  pass
ReverseBing()