import tkinter as tk

def convertir_pouces_en_mm(value):
    result = value * 25.4
    output_label.config(text=f"{result} mm")

def convertir_mm_en_pouces(value):
    result = value / 25.4
    output_label.config(text=f"{result} pouces")

root = tk.Tk()

entry_label = tk.Label(root, text="Entrer longueur:")
entry_label.pack()

entry = tk.Entry(root)
entry.pack()

output_label = tk.Label(root, text="")
output_label.pack()

convertir_pouces_button = tk.Button(root, text="Convertir pouces en mm", command=lambda: convertir_pouces_en_mm(float(entry.get())))
convertir_pouces_button.pack()

convertir_mm_button = tk.Button(root, text="Convertir mm en pouces", command=lambda: convertir_mm_en_pouces(float(entry.get())))
convertir_mm_button.pack()

root.mainloop()