Caixa de informações Tknter
from tkinter import messagebox
messagebox.showinfo('Title', 'Information')
Plain Pintail
from tkinter import messagebox
messagebox.showinfo('Title', 'Information')
from tkinter import messagebox
messagebox.showerror("Title", "Message")
from tkinter import messagebox
messagebox.option('title', 'message_to_be_displayed')