Loops Executed by a Single Thread : Thread « Thread « Python Tutorial

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from time import sleep, ctime

def loop0():
    print 'start loop 0 at:', ctime()
    sleep(4)
    print 'loop 0 done at:', ctime()

def loop1():
    print 'start loop 1 at:', ctime()
    sleep(2)
    print 'loop 1 done at:', ctime()

print 'starting at:', ctime()
loop0()
loop1()
print 'all DONE       at:', ctime()