from tkinter import *

def calcule():
    if xvar.get() != '' and yvar.get() != '':
        x = float(xvar.get())
        y = float(yvar.get())
        if choix.get() == 1:
            r = x * y
        elif choix.get() == 2:
            r = x + y
        elif choix.get() == 3:
            r = x - y
        else:
            r = x / y
        r = round(r,10)
        res_val.configure(text=str(r))
        xvar.set('')
        yvar.set('')
        choix.set(0)

def prod():
    choix.set(1)
    
def somme():
    choix.set(2)
    
def diff():
    choix.set(3)

def quot():
    choix.set(4)
    
def nombre(n='0'):
    if choix.get() == 0:
        xvar.set(xvar.get()+n)
        x_val.configure(text=xvar.get())
    else:
        yvar.set(yvar.get()+n)
        y_val.configure(text=yvar.get())

def annule():
    x_val.configure(text='')
    y_val.configure(text='')
    res_val.configure(text='')
    xvar.set('')
    yvar.set('')
    choix.set(0)
    
fen=Tk()
fen.title("Calculatrice")

choix = IntVar()
choix.set(0)
xvar = StringVar()
yvar = StringVar()

clavier = 16*[0]
for i in range(1,10):
    clavier[i] = Button(fen, width=6, text=chr(48+i),
                      command=lambda x=48+i:nombre(chr(x)))
    clavier[i].grid(row=(9-i)//3, column=(2+i)%3, padx=4, pady=4)
    
clavier[0]=Button(fen, width=6, text="0", command=nombre)
clavier[0].grid(row=3, column=0, padx=4, pady=4)
clavier[10]=Button(fen, width=6, text=".", command=lambda:nombre('.'))
clavier[10].grid(row=3, column=1, padx=4, pady=4)
clavier[11]=Button(fen, width=6, text="=", command=calcule)
clavier[11].grid(row=3, column=2, padx=4, pady=4)
clavier[12]=Button(fen, width=6, text="+", command=somme)
clavier[12].grid(row=0, column=3, padx=4, pady=4)
clavier[13]=Button(fen, width=6, text="-", command=diff)
clavier[13].grid(row=1, column=3, padx=4, pady=4)
clavier[14]=Button(fen, width=6, text="x", command=prod)
clavier[14].grid(row=2, column=3, padx=4, pady=4)
clavier[15]=Button(fen, width=6, text="/", command=quot)
clavier[15].grid(row=3, column=3, padx=4, pady=4)

x_lab = Label(fen, text='Valeur de x')
x_lab.grid(row=0, column=4)
x_val = Label(fen, width=10)
x_val.grid(row=1, column=4)

y_lab = Label(fen, text='Valeur de y')
y_lab.grid(row=2, column=4)
y_val = Label(fen, width=10)
y_val.grid(row=3, column=4)

res_lab = Label(fen, text='Résultat')
res_lab.grid(row=4, column=4)
res_val = Label(fen, width=20)
res_val.grid(row=5, column=4)

res = Button(fen, width=6, text='reset', command=annule)
res.grid(row=5, column=1)

fen.mainloop()