新线程阻止主线程 [英] new thread blocks main thread

问题描述

from threading import Thread
class MyClass:
    #...
    def method2(self):
        while True:
            try:
                hashes = self.target.bssid.replace(':','') + '.pixie'
                text = open(hashes).read().splitlines()
            except IOError:
                time.sleep(5)
                continue
        # function goes on ...

    def method1(self):
        new_thread = Thread(target=self.method2())
        new_thread.setDaemon(True)
        new_thread.start()  # Main thread will stop there, wait until method 2 

        print "Its continues!" # wont show =(
        # function goes on ...

有可能这样做吗? 在 new_thread.start()之后，主线程一直等到完成后，为什么会发生这种情况?我没有在任何地方提供new_thread.join().

Is it possible to do like that? After new_thread.start() Main thread waits until its done, why is that happening? i didn't provide new_thread.join() anywhere.

守护进程不能解决我的问题，因为我的问题是主线程在新线程启动后立即停止，而不是因为主线程执行已结束.

Daemon doesn't solve my problem because my problem is that Main thread stops right after new thread start, not because main thread execution is end.

推荐答案

按照编写，对Thread构造函数的调用是调用 self.method2而不是引用它.将target=self.method2()替换为target=self.method2，线程将并行运行.

As written, the call to the Thread constructor is invoking self.method2 instead of referring to it. Replace target=self.method2() with target=self.method2 and the threads will run in parallel.

请注意，由于 GIL，

Note that, depending on what your threads do, CPU computations might still be serialized due to the GIL.

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