CALCULADORA PYTHON ???

CÓDIGO:

#Modulos
from tkinter import*
from math import*

#Lienzo
canvas = Tk()
canvas.title ("calculadora")
canvas.geometry("300x500")
canvas.resizable(False,False)
canvas.configure(bg="#3B3225")
#Botones
ancho=6
alto=1
#Funciones
numero=" "
pantalla= StringVar()

#Ingresar datos
ing =Entry(canvas, width =33, textvariable=pantalla).place(x=1, y=170)

def borrar():
global numero
numero=" "
pantalla.set("0")

def click(n):
global numero
numero +=str(n)
pantalla.set(numero)

def reslt():
global numero
num=eval(numero)
pantalla.set(num)

#Botones

Boton0=Button(canvas, text = "0", width = ancho, height = 2,fg="white", bg="#4F4C48", command=lambda:click(0)).place(x=1, y=350)
Boton1=Button(canvas, text = "1", width = ancho, height = 2,fg="white", bg="#4F4C48", command=lambda:click(1)).place(x=1, y=300)
Boton2=Button(canvas, text = "2", width = ancho, height = 2,fg="white", bg="#4F4C48", command=lambda:click(2)).place(x=50, y=300)
Boton3=Button(canvas, text = "3", width = ancho, height = 2,fg="white", bg="#4F4C48", command=lambda:click(3)).place(x=100, y=300)
Boton4=Button(canvas, text = "4", width = ancho, height = 2,fg="white", bg="#4F4C48", command=lambda:click(4)).place(x=1, y=250)
Boton5=Button(canvas, text = "5", width = ancho, height = 2,fg="white", bg="#4F4C48", command=lambda:click(5)).place(x=50, y=250)
Boton6=Button(canvas, text = "6", width = ancho, height = 2,fg="white", bg="#4F4C48", command=lambda:click(6)).place(x=100, y=250)
Boton7=Button(canvas, text = "7", width = ancho, height = 2,fg="white", bg="#4F4C48", command=lambda:click(7)).place(x=1, y=200)
Boton8=Button(canvas, text = "8", width = ancho, height = 2,fg="white", bg="#4F4C48", command=lambda:click(8)).place(x=50, y=200)
Boton9=Button(canvas, text = "9", width = ancho, height = 2,fg="white", bg="#4F4C48", command=lambda:click(9)).place(x=100, y=200)
Botonp=Button(canvas, text = ".", width = ancho, height = 2,fg="white", bg="#4F4C48", command=lambda:click(".")).place(x=50, y=350)
Botoni=Button(canvas, text = "=", width = ancho, height = 2,fg="white", bg="#EF3128", command=reslt).place(x=100, y=350)
Botons=Button(canvas, text = "+", width = ancho, height = 2,fg="white", bg="#28B3EF", command=lambda:click("+")).place(x=150, y=350)
Botonr=Button(canvas, text = "-", width = ancho, height = 2,fg="white", bg="#28B3EF", command=lambda:click("-")).place(x=150, y=300)
Botonm=Button(canvas, text = "x", width = ancho, height = 2,fg="white", bg="#28B3EF", command=lambda:click("*")).place(x=150, y=250)
Botond=Button(canvas, text = "÷", width = ancho, height = 2,fg="white", bg="#28B3EF", command=lambda:click("/")).place(x=150, y=200)
Botonb=Button(canvas, text = "AC", width = ancho, height = 2,fg="white", bg="#EF3128", command=borrar).place(x=205, y=200)