线程锁的使用 lock

import threading
import time

lock = threading.Lock()

num = 0

lock = threading.Lock()

def play(name):
    global num
    for i in range(100):
        print(f"{name}正在工作{i}")
        lock.acquire()
        a = num
        time.sleep(0.1)
        a = a+1
        num = a
        lock.release()


t1 = threading.Thread(target=play, args=("tom",))
t2 = threading.Thread(target=play, args=("jerry",))
t3 = threading.Thread(target=play, args=("bob",))
t4 = threading.Thread(target=play, args=("kid",))

t1.start()
t2.start()
t3.start()
t4.start()

t1.join()
t2.join()
t3.join()
t4.join()

print("res", num)