线程的互斥锁

from threading import Thread,Lock
import time

mutex=Lock()

x=100
def task():
    global x
    # mutex.acquire()
    temp=x
    time.sleep(0.1)
    x=temp-1
    # mutex.release()

if __name__ == '__main__':
    t_l=[]
    start=time.time()
    for i in range(100):
        t=Thread(target=task)
        t_l.append(t)
        t.start()

    for t in t_l:
        t.join()

    stop=time.time()
    print(x,stop-start)