windows registry, tuples, turning off winXP firewall with Python

[Bart Nessux]

for i in range(10000):
     try:
         n,v,t = EnumValue(open_key,i)
         # n == name of the registry object.
         # v == object's value.
         # t == object's type.
         print n,v,t
     except EnvironmentError:
         print "\nThere are", i, "registy objects under this key."
         break

Is there a way to reference an item within a tuple that you've iterated 
over? The above code upacks a tuple into 3 variables n,v and t. In order 
to do this, it loops over a Windows registry key. Let's say that I want 
to find out which n == 'EnableFirewall' and then read the value of its 
v... how can I do that?

BTY, the below code turns off the 'Windows Firewall' on Windows XP 
Service Pack 2... I wrote it as a test after reading that MS is allowing 
3rd party programs to programmatically enable or disable the firewall 
through the registry.

from _winreg import *

sub_key = 
r"SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile"
open_key = OpenKey(HKEY_LOCAL_MACHINE, sub_key, 0, KEY_ALL_ACCESS)
SetValueEx(open_key,'EnableFirewall',0,REG_DWORD,0)
CloseKey(open_key)