#!/usr/bin/env python
# -*- coding: utf-8 -*-

from tkinter import *

def action():
    print("Yes, we can !")
    # impression de la valeur du champ
    abcdef = champ.get()
    print(abcdef)

root = Tk()
w = Label(root, text="Bonjour!")
w.grid(row=0)

champ = Entry(root)
champ.grid(row=1)

b = Button(root,text="Click here !",command=action)
b.grid(row=2)
c = Button(root,text="Quit",command=root.quit)
c.grid(row=3)

root.mainloop()

# éliminer la fenêtre :
root.destroy()