Get Hostname for specific servers range

#!/usr/bin/python

import sys
import urllib2
import re
import string


def banner():

    print '''
             d8888
            d8P888
           d8P 888
888  888  d8P  888
888  888 d88   888
Y88  88P 8888888888
 Y8bd8P        888
  Y88P         888  Team

[#] By Cyber-Crystal [#]
[#] WwW.V4-Team.Com  [#]
    '''
if len(sys.argv) < 2:
    banner()
    print "\n"
    print "Get ALl HostName For all datecenters"
    print "well be use 192.168.1.1 End 192.168.1.254 ok !!\n"

    print "use %s IP_Target" % sys.argv[0]
    sys.exit()

def server():
    try:
        ss = sys.argv[1]
        sp = ss.split('.')
        buf =  sp[0]+"."
        buf += sp[1]+"."
        buf += sp[2]
        for i in range(1,254):
            try:
                v4 = buf+"."+str(i)
                file = open("datacenter.txt", 'a')
                url = urllib2.urlopen("http://s92443018.onlinehome.us/cgi-bin/host.php?"+v4)
                date = url.read()
                find = re.findall("Hostname: (.*?)<br>",date)
                for host in range(len(find)):
                    print find[host] + " Ip :: " +v4
                    file.write(find[host]+" : ip : "+v4+"\n")
            except IOError:
                pass
    except IOError:
        pass

server()
print "\n\n"
print "you Wint reverse Domans ALl server ? \n"
a = raw_input(" yes / no : ")

def reverse():
    try:
        ss = sys.argv[1]
        sp = ss.split('.')
        buf =  sp[0]+"."
        buf += sp[1]+"."
        buf += sp[2]
        for i in range(1,254):
            try:

                v4 = buf+"."+str(i)
                file = open(v4+".txt" , "a")
                #file = open(sys.argv[1], 'a')
                url = urllib2.urlopen("http://sameip.org/ip/"+v4)
                date = url.read()
                find = re.findall('target="_blank">(.+)</a>',date)
                cw = len(find)-3
                for o in range(cw):
                    print  "Get siets for : "+v4
                    coms = find[o]
                    file.write(coms+"\n")

            except IOError:
                pass
    except IOError:
        pass
if a == 'yes':
    reverse()

else :
    print "v4-team.com"
    print "Exit"
    sys.exit()