tkinter button
import Tkinter
import tkMessageBox
top = Tkinter.Tk()
def helloCallBack():
tkMessageBox.showinfo( "Hello Python", "Hello World")
B = Tkinter.Button(top, text ="Hello", command = helloCallBack)
B.pack()
top.mainloop()
Python Tkinter Button Widget
import tkinter as tk
r = tk.Tk()
r.title('Testing Button Widget')
# After pressing button our code will be stop
button = tk.Button(r, text='Stop', width=25, command=r.destroy)
button.pack()
r.mainloop()