import tkinter as tk
from tkinter.constants import *

class Fenetre(tk.Tk):
    def __init__(self):
        tk.Tk.__init__(self)
        self.title("Calculatrice")
        self.geometry("400x600")
        self.configure(bg='pink')
        tk.Canvas(self, width=350, height=175, bg='ivory').pack(side=TOP, padx=5, pady=25)
        self.frame = tk.Frame(self, bg='pink')
        self.entree = tk.Entry(self.frame, width=30)
        self.entree.pack(side=TOP, anchor='n', padx = 5, pady = 100)
        self.bouton = tk.Button(self.frame, text="Calculer", bg='white').pack(anchor = 's', padx = 100, pady = 10)
        self.frame.pack(padx = 5, pady =40)
    
window = Fenetre()
window.mainloop()