python - 如何在Python中使用tkinter按钮终止两个进程

Question

我想用 python 脚本创建两个进程。需要通过 tkinter 按钮启动和停止这些进程。进程正确启动，但无法终止。使用 tkinter 按钮正确终止进程的最简单方法是什么？哪种最佳实践方法？

from tkinter import *
import multiprocessing

def print1():
    global a
    while a == True:
        print('im process 1')

def print2():
    global a
    while a == True:
        print('im process 2')

def start():
    process1.start()
    process2.start()

def stop():
    global a
    a = False

a = True

if __name__ == '__main__':

    process1 = multiprocessing.Process(target = print1)
    process2 = multiprocessing.Process(target = print2)

    root = Tk()
    root.title("Title")
    root.geometry("200x200")

    app = Frame(root)
    app.grid()

    start = Button(app, text="Start", command=start)
    stop = Button(app, text="Stop", command=stop)
    start.grid()
    stop.grid()
    root.mainloop()
    process1.join()
    process2.join()

Answer 1

问题似乎出在 stop 方法中。

我想我可能知道问题是什么，但我不是 100% 确定。为什么的答案似乎在 python 文档中。这里的代码运行良好(我编辑了语法并使用 tkk 作为按钮，它看起来更好):

from tkinter import *
from tkinter import ttk
import multiprocessing


def print1():
    global a
    while a is True:
        print('im process 1')


def print2():
    global a
    while a is True:
        print('im process 2')


def start():
    process1.start()
    process2.start()


def stop():
    process1.kill()
    process2.kill() 


a = True

if __name__ == '__main__':

    process1 = multiprocessing.Process(target=print1)
    process2 = multiprocessing.Process(target=print2)

    root = Tk()
    root.title("Title")
    root.geometry("200x200")

    app = Frame(root)
    app.grid()

    start = ttk.Button(app, text="Start", command=start)
    stop = ttk.Button(app, text="Stop", command=stop)
    start.grid(padx=15, pady=20)
    stop.grid(column=1, row=0)
    root.mainloop()
    process1.join()
    process2.join()

希望这有帮助!