import tkinter as tk

def conversion():
    temperature = float(entree.get())
    if choix_conversion.get() == "°F -> °C":
        resultat = (temperature - 32) * 5/9
        label_resultat.config(text=f"{resultat:.2f} °C")
    else:
        resultat = (temperature * 9/5) + 32
        label_resultat.config(text=f"{resultat:.2f} °F")

fenetre = tk.Tk()
fenetre.title("Conversion température")

entree = tk.Entry(fenetre)
entree.pack()

choix_conversion = tk.StringVar()
choix_conversion.set("°F -> °C")

menu_conversion = tk.OptionMenu(fenetre, choix_conversion, "°F -> °C", "°C -> °F")
menu_conversion.pack()

bouton_convertir = tk.Button(fenetre, text="Convertir", command=conversion)
bouton_convertir.pack()

label_resultat = tk.Label(fenetre, text="Résultat :")
label_resultat.pack()

fenetre.mainloop()