Working with Threads

#Working with Threads
from __future__ import print_function      #Compatibilidade func print python 2/3
from threading import Thread
from time import sleep
import random

#Target function
def worker(tsleep):
    print ('worker ini', tsleep)
    sleep(tsleep)
    print ('worker fim', tsleep)

t = Thread(target=worker, args=(random.randrange(10, 20),))
t.start()

while t.isAlive():
    sleep(1)
    print('waiting')

print('end')