Python: disable and re-enable button

Question

I want to create a button that I can disable and re-enable as soon as I click it. With the following code, I get a button that I can disable, but it won't re-enable when I click it. If looked at this threat, but it didn't help: Disable / Enable Button in TKinter

import tkinter
from tkinter import *

# toplevel widget of Tk which represents mostly the main window of an application
root = tkinter.Tk()
root.geometry('1800x600')
root.title('Roll Dice')
frame = Frame(root)

# label to display dice
label = tkinter.Label(root, text='', font=('Helvetica', 120))

# function activated by button
def switch1():
    if button1["state"] == "active":
        button1["state"] = "disabled"
    else:
        button1["state"] = "active"

button1 = tkinter.Button(root, text='Würfel 1', foreground='green', command=lambda: switch1, state = "active")

button1.pack(side = LEFT)

root.mainloop()

Also instead of command=lambda: switch1 use command=switch1. Also also you know that when the button is disabled it can't be clicked so the user can't re enable it. What exactly are you trying to do? — TheLizzard
– TheLizzard, Commented May 2, 2021 at 9:22
I wanted to disbale and re-enable a function by clicking on the button. I guess I try it with a variable for True and False — Mazze
– Mazze, Commented May 2, 2021 at 15:15
You can add another button that toggles button1's state. What exactly are you trying to do? Why do you want to toggle the button? — TheLizzard
– TheLizzard, Commented May 2, 2021 at 15:17
I want to disbale and re-enable a function by clicking on the Button. — Mazze
– Mazze, Commented May 2, 2021 at 15:19

TheLizzard · Accepted Answer · 2021-05-02 15:23:55Z

2

Look at this:

import tkinter as tk

def toggle_state():
    if button1.cget("state") == "normal":
        button1.config(state="disabled")
    else:
        button1.config(state="normal")

root = tk.Tk()

button1 = tk.Button(root, text="This button toggles state")
button1.pack()

button2 = tk.Button(root, text="Click me", command=toggle_state)
button2.pack()

root.mainloop()

This uses a button to toggle the state of the other button.

answered May 2, 2021 at 15:23

TheLizzard

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6 Comments

Delrius Euphoria Over a year ago

If anyone is crazy and wants a oneliner ~

command=lambda: button1.config(state="disabled") if button1.cget("state") == "normal" else button1.config(state="normal")

.

TheLizzard Over a year ago

@CoolCloud Nice 1 liner. I never knew that you can put if statements inside lambdas :D

Delrius Euphoria Over a year ago

Yes, but it single handedly violated PEP8's rule of 80 characters in one line :P

TheLizzard Over a year ago

@CoolCloud Also the zen of python PEP 20. Lets see how many PEPs you can violate with 1 line of code :D

Mazze Over a year ago

thanks that works. The one liner get's me confused :D

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