how to make alert dialog in tkinter
import tkinter as tk
from tkinter import messagebox as mb
def answer():
    mb.showerror("Answer", "Sorry, no answer available")
def callback():
    if mb.askyesno('Verify', 'Really quit?'):
        mb.showwarning('Yes', 'Not yet implemented')
    else:
        mb.showinfo('No', 'Quit has been cancelled')
tk.Button(text='Quit', command=callback).pack(fill=tk.X)
tk.Button(text='Answer', command=answer).pack(fill=tk.X)
tk.mainloop()
