我收到此错误&运行错误：当我单击关闭，然后再次单击运行时，线程只能启动一次 [英] i get this error "RuntimeError: threads can only be started once" when i click close and then click run again

问题描述

import threading
from tkinter import *


running = False


def run():
    global running
    c = 1
    running = True
    while running:
        print(c)
        c += 1


run_thread = threading.Thread(target=run)


def kill():
    global running
    running = False


root = Tk()
button = Button(root, text='Run', command=run_thread.start)
button.pack()
button1 = Button(root, text='close', command=kill)
button1.pack()
button2 = Button(root, text='Terminate', command=root.destroy)
button2.pack()
root.mainloop()

click here for error img...当我进入循环时，当我关闭循环且无法再次重新启动时，我正在使用线程以某种方式使我的UI工作。

推荐答案

正如错误所述，终止的线程无法再次启动。

您需要创建另一个线程：

import threading
from tkinter import *

running = False

def run():
    global running
    c = 1
    running = True
    while running:
        print(c)
        c += 1

def start():
    if not running:
        # no thread is running, create new thread and start it
        threading.Thread(target=run, daemon=True).start()

def kill():
    global running
    running = False

root = Tk()
button = Button(root, text='Run', command=start)
button.pack()
button1 = Button(root, text='close', command=kill)
button1.pack()
button2 = Button(root, text='Terminate', command=root.destroy)
button2.pack()
root.mainloop()

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