tkinter multi threading auto start

Question

So in my tkinter app I need to check input on button but when I start the program with this code it starts the function (without me clicking the button) and I have no idea why it does that is.

submit = tk.Button(app,text='Submit details',bg='black',fg='white',
                   command=threading.Thread(target=get_input_info).start()).grid(row=4)

You are also assigning the value `None` to `submit` because that's what the `grid()` method *always* returns. — martineau, Jul 14 '21 at 14:25
`tkinter` isn't meant to be called from different threads. So please only call `tkinter` functions from the thread where you created the `Tk()` — TheLizzard, Jul 14 '21 at 15:44

score 0 · Answer 1 · answered Jul 14 '21 at 14:18

Just remove the pair of parantheis from the end of the command argument.

eg:

from tkinter import *
import threading


def hehe():
    print("some stuff")

win=Tk()
submit = Button(text="something", command=threading.Thread(target=hehe).start).pack()
win.mainloop()

PCM · Accepted Answer · 2021-07-15T02:55:46.343

0

You need to remove Parenthesis -

command=threading.Thread(target=get_input_info).start

Or use, lambda (useful when you need to pass args) -

command=lambda:threading.Thread(target=get_input_info).start()

edited Jul 15 '21 at 02:55

answered Jul 14 '21 at 14:19

PCM

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If using lambda, it should be `lambda:threading.Thread(target=get_input_info).start()`. – acw1668 Jul 14 '21 at 15:17
Sorry. Good Pointed! – PCM Jul 15 '21 at 02:55

tkinter multi threading auto start

2 Answers2