how to use messagebox error in python code example

Example 1: tkinter info box

from tkinter import messagebox

messagebox.showinfo('Title', 'Information')

Example 2: tkinter messagebox

import Tkinter
import tkMessageBox

top = Tkinter.Tk()
def hello():
   tkMessageBox.showinfo("Say Hello", "Hello World")

B1 = Tkinter.Button(top, text = "Say Hello", command = hello)
B1.pack()

top.mainloop()