How to make button change colour in tkinter?

Question

How do I make a button change colour in python tkinter 3?
I saw one using the self code but I don't like to use that. Here is the code:

from tkinter import *
from tkinter import ttk
root = Tk()

button = ttk.Button(root, text = "Click Me")
button.pack()
button.config(command = colour_change)

def colour_change():
    button.config(background= "green")

Answer 1

I am not entirely sure what you mean by "I saw one using the self code ..." but essentially, you can choose to set background colour of a button:

1. At the time of creation by passing a parameter to constructor

   btn = Button(root, bg='red') # and other parameters if you like

2. Whenever you want once the object is created until it's reference is valid by

   btn.config(bg='green')

   Now, when exactly you call this method is entirely up to you. It is just that the code snippet that you have shown is doing so at the click of that button itself.