python 多线程锁

[python]代码库

import threading
import time

#某段代码只能单线程执行时，上锁，其他线程等待，直到释放锁后，其他线程再争锁，执行代码，释放锁
locka = threading.Lock()

a = 0
def add1():
    global a    
    try:
        locka.acquire() # 获得锁
        tmp = a + 1
        time.sleep(0.2) # 延时0.2秒，模拟写入所需时间
        a = tmp
    finally:
        locka.release() # 释放锁
    print('%s  adds a to 1: %d'%(threading.current_thread().getName(),a))
    
threads = [threading.Thread(name='t%d'%(i,),target=add1) for i in range(10)]
[t.start() for t in threads]