用python写一个死锁示例

以下是一个简单的Python死锁示例：

import threading

# 创建两个锁对象
lock1 = threading.Lock()
lock2 = threading.Lock()

# 定义两个线程A和B
def threadA():
    lock1.acquire()
    print("Thread A acquired lock1")
    lock2.acquire()
    print("Thread A acquired lock2")
    lock2.release()
    print("Thread A released lock2")
    lock1.release()
    print("Thread A released lock1")

def threadB():
    lock2.acquire()
    print("Thread B acquired lock2")
    lock1.acquire()
    print("Thread B acquired lock1")
    lock1.release()
    print("Thread B released lock1")
    lock2.release()
    print("Thread B released lock2")

# 创建并启动线程
t1 = threading.Thread(target=threadA)
t2 = threading.Thread(target=threadB)
t1.start()
t2.start()

在这个示例中，线程A和线程B都需要同时获取lock1和lock2两个锁对象。如果线程A获取了lock1，而线程B获取了lock2，那么两个线程都会被阻塞，进入死锁状态。因为线程A需要lock2才能释放lock1，而线程B需要lock1才能释放lock2。因此，这两个线程都无法继续执行，导致死锁。