oddeven.py

import threading

c = threading.Condition()
arr = [i-1 for i in range(1, 101)]


def odd():
    for i in range(1, 100, 2):
        with c:
            print 'odd: ', arr[i]
            c.notify()
            c.wait()


def even():
    for i in range(0, 100, 2):
        with c:
            print 'even: ', arr[i]
            c.notify()
            c.wait()
    with c:
        c.notify()

t1 = threading.Thread(target=even)
t2 = threading.Thread(target=odd)

t1.start()
t2.start()

t1.join()
t2.join()