Liunx (threading_ex3 lock 真机演示)

# Sooele
import threading
import time
def run(n):
    lock.acquire()   #acquire获得
    global num
    num += 1
    #time.sleep(1)
    lock.release()   #release释放
lock = threading.Lock()
num = 0
t_objs = [] #存线程实例
for i in range(50):
    t = threading.Thread(target=run,args=("t-%s" %i ,))
    t.start()
    t_objs.append(t) #为了不阻塞后面线程的启动，不在这里join，先放到一个列表里
for t in t_objs: #循环线程实例列表，等待所有线程执行完毕
    t.join()
print("----------all threads has finished...",threading.current_thread(),threading.active_count())
print("num:",num)