One attempt to work with multi thread in python

multithread.py

import threading
from time import sleep

finish = False

def thread1():
    print "entrando thread1"
    global finish
    sleep(10)
    print "acabou thread1"
    finish = True

def thread2():
    print "entrando thread2"
    print "acabou thread2"

t1 = threading.Thread(target=thread1, args=[])
t2 = threading.Thread(target=thread2, args=[])
t1.start()
t2.start()

while not finish:
    pass

print "acabou"