with lock:代码块内的内容是每个线程执行的代码。 6. 启动线程 现在我们准备启动我们的线程。我们将创建多个线程并让它们同时运行。 threads=[]# 创建一个空的线程列表foriinrange(5):# 创建5个线程t=threading.Thread(target=increment_counter)# 定义线程的目标函数threads.append(t)# 将线程添加到列表中t.sta...
num=0#全局变量多个线程可以读写,传递数据 mutex=threading.Lock() #创建一个锁classMythread(threading.Thread): def run(self):globalnum with mutex: #with Lock的作用相当于自动获取和释放锁(资源)foriinrange(1000000): #锁定期间,其他线程不可以干活 num+=1print(num) mythread=[]foriinrange(5): t...
importthreadingimporttime# 创建一个锁lock=threading.Lock()# 未释放的锁defblock_thread():lock.acquire()print("Lock acquired by block_thread")time.sleep(5)# 模拟长时间操作# lock.release() # 此处未释放锁defother_thread():time.sleep(1)print("Attempting to acquire lock in other_thread")lock....
subThread02.start() subThread01.join() subThread02.join() print("num result : %s" % num) with语句 由于threading.Lock()对象中实现了enter__()与__exit()方法,故我们可以使用with语句进行上下文管理形式的加锁解锁操作: import threadingnum = 0def add(): with lock: # 自动加锁 global num for...
with lock: # 自动加锁 global num for i in range(10_000_000): num -= 1 # 自动解锁 if __name__ == "__main__": lock = threading.RLock() subThread01 = threading.Thread(target=add) subThread02 = threading.Thread(target=sub) subThread01.start() subThread02.start() subThread01.j...
我们可以使用 with lock: 并将我们所有的关键代码放在这个块中。这是防止竞争条件的更简单的方法。以下代码片段显示了使用 with lock: 来防止 Python 中的竞争条件。 from threading import Thread, Lock counter = 0 def increase(by, lock): global counter with lock: local_counter = counter local_counter ...
python Treading中的Lock模块提供了加锁和释放锁的方法,分别是acquire()和release(). 这两个方法可以搭配python的with语句使用. """ # 示例 fromthreadingimportLock temp_lock=Lock() withtemp_lock: print(temp_lock) # 输出是 <locked _thread.lock object at 0x10e304870> 说明temp_lock上锁了...
暂停线程运行、等待唤醒currentRunThreadNumber+=1print("carry on run thread :%s"%thName)condLock....
count = 0 lock = threading.Lock() Define a function for the thread def print_time(threadName): global count 代码语言:javascript 代码运行次数:0 运行 c=0withlock:while(c<100):c+=1count+=1print("{0}: set count to {1}".format(threadName,count)) ...
#线程锁,单锁实例 import time,threading def run(n): lock.acquire() #加锁 global num num+=1 lock.release() #释放锁 lock=threading.Lock()#获得线程锁 num=0 threads=[] for i in range(50): thread=threading.Thread(target=run,args=("t-%s"%i,)) thread.start() threads.append(thread) ...