import threading, time

threadLimiter = threading.Semaphore(5)

class EncodeThread(threading.Thread):
    def __init__(self, count):
        self.count = count
        threading.Thread.__init__(self)
    def run(self):
        threadLimiter.acquire()
        try:
            print(self.count)
            time.sleep(10)
        finally:
            threadLimiter.release()

for i in range(100):
    EncodeThread(i).start()