Python线程信号

我正在寻找一些关于使用线程模块在python中实现的帮助

我有两个线程，假设线程1和线程2

我希望线程1-->向线程2发出启动信号。 直到线程1终止才终止

---

是否有一种方法可以提供从线程1到线程2的信号

有点不清楚你到底想完成什么。您可能正在寻找的是等待另一个线程的

threading.Thread.join（）

，以及唤醒另一个线程的

threading.Event

这里有一个例子

Thread2

有一个

threading.Event

对象，它会阻止该对象（通过

.wait（）

），直到

Thread1

有

.set（）

事件

Thread1

然后调用

Thread2

上的

.join（）

，等待它完成

同样，由于不太清楚您想要做什么，所以这个示例非常做作

import threading


class Thread1(threading.Thread):

    def __init__(self, thread2):
        threading.Thread.__init__(self)
        self.thread2 = thread2

    def run(self):
        print("Hello from thread1 - I'm now running. Let's wake up thread2")
        self.thread2.event.set()
        print("Now thread1 waits for thread2 to quit")
        self.thread2.join()

class Thread2(threading.Thread):

    def __init__(self, event):
        threading.Thread.__init__(self)
        self.event = event

    def run(self):
        print("Hello from thread 2 - I'm now running, but I'll wait for thread1")
        self.event.wait()
        print("Hello from thread 2 - I've just woken up")
        print("Now thread2 is stopping")


thread2_event = threading.Event()
thread2 = Thread2(thread2_event)
thread2.start()

thread1 = Thread1(thread2)
thread1.start()

thread1.join()

print("Everybody done")

哪张照片

Hello from thread 2 - I'm now running, but I'll wait for thread1
Hello from thread1 - I'm now running. Let's wake up thread2
Now thread1 waits for thread2 to quit
Hello from thread 2 - I've just woken up
Now thread2 is stopping
Everybody done

---

有点不清楚你到底想要完成什么。您可能正在寻找的是等待另一个线程的

threading.Thread.join（）

，以及唤醒另一个线程的

threading.Event

这里有一个例子

Thread2

有一个

threading.Event

对象，它会阻止该对象（通过

.wait（）

），直到

Thread1

有

.set（）

事件

Thread1

然后调用

Thread2

上的

.join（）

，等待它完成

同样，由于不太清楚您想要做什么，所以这个示例非常做作

import threading


class Thread1(threading.Thread):

    def __init__(self, thread2):
        threading.Thread.__init__(self)
        self.thread2 = thread2

    def run(self):
        print("Hello from thread1 - I'm now running. Let's wake up thread2")
        self.thread2.event.set()
        print("Now thread1 waits for thread2 to quit")
        self.thread2.join()

class Thread2(threading.Thread):

    def __init__(self, event):
        threading.Thread.__init__(self)
        self.event = event

    def run(self):
        print("Hello from thread 2 - I'm now running, but I'll wait for thread1")
        self.event.wait()
        print("Hello from thread 2 - I've just woken up")
        print("Now thread2 is stopping")


thread2_event = threading.Event()
thread2 = Thread2(thread2_event)
thread2.start()

thread1 = Thread1(thread2)
thread1.start()

thread1.join()

print("Everybody done")

哪张照片

Hello from thread 2 - I'm now running, but I'll wait for thread1
Hello from thread1 - I'm now running. Let's wake up thread2
Now thread1 waits for thread2 to quit
Hello from thread 2 - I've just woken up
Now thread2 is stopping
Everybody done