如何在线程子类守护进程中创建线程？

Question

如何在下面的 class 守护进程中设置线程以便在程序结束后停止？

import threading
import time

class A_Class(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)

    def __del__(self):
        print('deleted')

    def run(self):
        while True:
            print("running")
            time.sleep(1)

a_obj = A_Class()
a_obj.start()

time.sleep(5)
print('The time is up, the thread should end')

Answer 1

您应该将 daemon=True 添加到您的 Thread.__init__():

import threading
import time

class A_Class(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self, daemon=True)

    def __del__(self):
        print('deleted')

    def run(self):
        while True:
            print("running")
            time.sleep(1)

a_obj = A_Class()
a_obj.start()

time.sleep(5)
print('The time is up, the thread should end')

Answer 2

另一种方法 - 在调用 super().__init__() 后将其设置为守护进程。

class A_Class(threading.Thread):
    def __init__(self):
        super().__init__()
        self.daemon = True

    def __del__(self):
        print('deleted')

    def run(self):
        while True:
            print("running", self.isDaemon())
            time.sleep(1)

或使用关键字参数：

class A_Class(threading.Thread):
    def __init__(self,*args,**kwargs):
        super().__init__(**kwargs)

    def __del__(self):
        print('deleted')

    def run(self):
        while True:
            print("running", self.isDaemon())
            time.sleep(1)

a_obj = A_Class(daemon=True)

如何在线程子类守护进程中创建线程？

how to make a thread in a thread subclass daemon?

python

multithreading

daemon