import tkinter as tk

fenetre = tk.Tk()
fenetre.title("convertisseur")
canvas = tk.Canvas(fenetre, width=500, height=500, bg='white')



buttonKM= tk.Button (fenetre, text ='Kilomètres -> Miles').grid(column=1, row=1,
                                                               padx=5, pady=5)
buttonMK= tk.Button (fenetre, text ='Miles -> Kilomètres').grid(column=1, row=2,
                                                                padx=5, pady=5)
                                                                 




fenetre.mainloop()