pythonchallenge LEVEL 4

import urllib2
import urllib2
import re

def http_conn(param):
    url = "http://www.pythonchallenge.com/pc/def/linkedlist.php?nothing="
    req = urllib2.Request(url+param)
    res = urllib2.urlopen(req).read()
    return res

param = "".join(re.findall("[0-9]",http_conn("8022")))
for i in range(400):
    if "and the next nothing is" in http_conn(param):
        param = "".join(re.findall("[0-9]",http_conn(param)))
        print "[*] "+"".join(re.findall("[0-9]",http_conn(param)))
    else:
        print http_conn(param)
        break