from tkinter import Tk, Message
root = Tk()
m = Message(text=
    'This is a Tkinter message widget. Pretty exiting, huh? I enjoy Tkinter. It is very simple.'
    )
m.pack(expand=True, fill='x')
m.bind('<Configure>', lambda e: m.configure(width=e.width - 10))
How to make Tkinter message expand when I resize the window?