python 面向对象进程通信

import multiprocessing
import tkinter as tk
from tkinter.ttk import Frame, Button

class UI:
    def __init__(self, master, queue):
        # set up start of screen
        self.root = master
        self.frame = Frame(self.root, width=800, height=800)
        self.frame.pack_propagate(0)
        self.frame.pack()
        self.index = 0
        self.queue = queue
        bt = Button(self.frame, text='dddddd', width=50)
        bt.bind('<Button-1>', self.send_message)
        bt.grid(row=0)

    def send_message(self, event):
        self.queue.put('----------------%d' % self.index)
        self.index += 1

def runtk(queue):
    root = tk.Tk()
    ui = UI(root, queue)
    root.mainloop()

if __name__ == '__main__':
    # 创建进程通信的Queue
    queue = multiprocessing.Queue()
    # 创建子进程
    process = multiprocessing.Process(target=runtk, args=(queue,))
    # 启动子进程
    process.start()
    while True:
        print(multiprocessing.current_process().pid, "取数据：")
        print(queue.get())