Generate real random urls in python

This will create a random ip address using random.randint(0, 255) like this:

        ip0 = str(random.randint(0, 255))
        ip1 = str(random.randint(0, 255))
        ip2 = str(random.randint(0, 255))
        ip3 = str(random.randint(0, 255))
        url = ip0 + '.' + ip1 + '.'+ ip2 + '.'+ ip3

It will then try to get the hosts address by using socket.gethostbyaddr(url) and if it's good/real it will print the address and write it to the file links.txt

import random, urllib2, os, socket, time
from threading import Thread, active_count

f=open("links.txt", 'w')
global p
global done
global alinks
alinks = []
maxurls = 100
p=0
def main():
    global alinks
    global done
    global p
    while p != maxurls:
        ip0 = str(random.randint(0, 255))
        ip1 = str(random.randint(0, 255))
        ip2 = str(random.randint(0, 255))
        ip3 = str(random.randint(0, 255))
        url = ip0 + '.' + ip1 + '.'+ ip2 + '.'+ ip3
        try:
            link = socket.gethostbyaddr(url)
            print link[0]
            f.write(link[0])
            f.write("\n")
            p=p+1
            try:
                urlContent = urllib2.urlopen(url).read()
                if urlContent.find('<html') > -1 or urlContent.find('<HTML') > -1:
                    break
            except:
                pass
        except:
            pass
    done = done - 1
   

maxi = 55
done = maxi
hhh = 0
while hhh != maxi:
    hhh=hhh+1
    Thread(target=main, args=()).start()

while done != 0 or done > 0:
        time.sleep(1.2)

print "Writing to File"
alinks.tofile(f)
print "Done exiting"

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