Practice multiple threads code, will improve one of my Python programs' efficiency.

gistfile1.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

'''
Created on 2014年12月7日
@author: reed
'''

import thread
import time

count = 0
lock = thread.allocate_lock()

def threadTest():
    
    global count
    
    for i in xrange(100000):
        global lock
        lock.acquire()
        count += 1
        lock.release()

for i in range(6):
    
    thread.start_new_thread(threadTest, ())

time_to_wait = 10 # This time need be long enough, otherwise CPU may not finish processing
                  # the counting task when it run to "print count".

for x in range(time_to_wait):
    print time_to_wait - x
    time.sleep(1)

print count

Actually I still have question on lock.acquire() and lock.release(), shall I put it out of the for loop?