import threading
import time

def run(n):
    lock.acquire()
    global  num
    num +=1

    lock.release()
    time.sleep(1)


lock = threading.Lock()
num = 0
t_objs = [] #存線程實例
for i in range(1000):
    t = threading.Thread(target=run,args=("t-%s" %i ,))
    t.start()
    t_objs.append(t) #為了不阻塞後面線程的啟動，不在這裏join，先放到一個列表裏

for t in t_objs: #循環線程實例列表，等待所有線程執行完畢
    t.join()

print("----------all threads has finished...",threading.current_thread(),threading.active_count())

print("num:",num)

lock多線程鎖