gistfile1.txt

import time
from threading import Thread, Lock
import itertools

c = itertools.count()
s = Lock()

a = 0
b = next(c)
z = 0

running = True


def incr():
    global a
    global b
    global z
    while running:
        a += 1
        b = next(c)
        with s:
            z += 1


threads = []
for i in range(10):
    t = Thread(target=incr)
    t.start()
    threads.append(t)


try:
    while True:
        print a, b, z
        time.sleep(1)
except KeyboardInterrupt:
    running = False

for t in threads:
    t.join()