Tkinter buttons calling functions without pressing them

February 8, 2022

I’ve had this problem for a while. When I start a program, any tkinter buttons will call their functions without being pressed or anything. and after that, I cannot use the button anymore because it only works once for some reason. Can anybody help?

This is not the actual code, but it is an example:

from tkinter import *

root = Tk()

def function():
    print("activated")

button = Button(root, text="this is a button", command=function)
button.pack()

root.mainloop()

>Solution :

Just call the function rather than sending it to command:

from tkinter import *

root = Tk()

def function():
    print("activated")

button = Button(root, text="this is a button", command = function()) #notice the change here.
button.pack()

root.mainloop()

Just add ()