how to add butons in GUI python code example

Example: 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