python call function on button click tkinter code example

Example 1: python button tkinter

from tkinter import *

wow = Tk()

def ree(hi):
  print(hi)
  
w = Button ( master=wow, command=ree('hi'), text="hi" )

Output:
  Tkinter:
    ______
   [  hi  ] <--- Button
    ------
  
  Shell:
    hi <--- on button pressed

Example 2: call a function onclick tkinter

def someFunction:
    function body

tkWindow = Tk()

button = Button(tkWindow, command=someFunction)