Calculadora_.py

from tkinter import *

ventana = Tk()
ventana.title("Calculadora")
i = 0
#Funciones
def click_boton(valor):
    global i
    cajaTexto.insert(i,valor)
    i += 1
def borrar():
    cajaTexto.delete(0, END)
    i = 0
def operacion():
    ecuacion = cajaTexto.get()
    resultado = eval(ecuacion)
    cajaTexto.delete(0, END)
    cajaTexto.insert(0, resultado)
    i = 0
#Entrada
cajaTexto = Entry(ventana)
cajaTexto.grid(row = 0, column = 0, columnspan = 4)

#Botones
#boton = Button(ventana, text = "", width = 5, height = 2, command = lambda: click_boton())
boton1 = Button(ventana, text = "1", width = 5, height = 2, command = lambda: click_boton(1))
boton2 = Button(ventana, text = "2", width = 5, height = 2, command = lambda: click_boton(2))
boton3 = Button(ventana, text = "3", width = 5, height = 2, command = lambda: click_boton(3))
boton4 = Button(ventana, text = "4", width = 5, height = 2, command = lambda: click_boton(4))
boton5 = Button(ventana, text = "5", width = 5, height = 2, command = lambda: click_boton(5))
boton6 = Button(ventana, text = "6", width = 5, height = 2, command = lambda: click_boton(6))
boton7 = Button(ventana, text = "7", width = 5, height = 2, command = lambda: click_boton(7))
boton8 = Button(ventana, text = "8", width = 5, height = 2, command = lambda: click_boton(8))
boton9 = Button(ventana, text = "9", width = 5, height = 2, command = lambda: click_boton(9))
boton0 = Button(ventana, text = "0", width = 5, height = 2, command = lambda: click_boton(0))
botonSuma = Button(ventana, text = "+", width = 5, height = 2, command = lambda: click_boton("+"))
botonResta = Button(ventana, text = "-", width = 5, height = 2, command = lambda: click_boton("-"))
botonMulti = Button(ventana, text = "*", width = 5, height = 2, command = lambda: click_boton("*"))
botonDivi = Button(ventana, text = "/", width = 5, height = 2, command = lambda: click_boton("/"))
botonParent1 = Button(ventana, text = "(", width = 5, height = 2, command = lambda: click_boton("("))
botonParent2 = Button(ventana, text = ")", width = 5, height = 2, command = lambda: click_boton(")"))
botonClear = Button(ventana, text = "AC", width = 5, height = 2, command = borrar)
botonIgual= Button(ventana, text = "=", width = 5, height = 2, command = operacion)
botonPunto = Button(ventana, text = ".", width = 5, height = 2, command = lambda: click_boton("."))
botonPorciento = Button(ventana, text = "%", width = 5, height = 2, command = lambda: click_boton("%"))
#Agregar botones a pantalla
botonClear.grid(row = 1, column = 0, padx = 5, pady = 5)
botonParent1.grid(row = 1, column = 1, padx = 5, pady = 5)
botonParent2.grid(row = 1, column = 2, padx = 5, pady = 5)
botonDivi.grid(row = 2, column = 3, padx = 5, pady = 5)
boton1.grid(row = 4, column = 0, padx = 5, pady = 5)
boton2.grid(row = 4, column = 1, padx = 5, pady = 5)
boton3.grid(row = 4, column = 2, padx = 5, pady = 5)
boton4.grid(row = 3, column = 0, padx = 5, pady = 5)
boton5.grid(row = 3, column = 1, padx = 5, pady = 5)
boton6.grid(row = 3, column = 2, padx = 5, pady = 5)
boton7.grid(row = 2, column = 0, padx = 5, pady = 5)
boton8.grid(row = 2, column = 1, padx = 5, pady = 5)
boton9.grid(row = 2, column = 2, padx = 5, pady = 5)
boton0.grid(row = 5, column = 1, padx = 5, pady = 5)
botonPunto.grid(row = 5, column = 0, padx = 5, pady = 5)
botonIgual.grid(row = 5, column = 3, padx = 5, pady = 5)
botonSuma.grid(row = 3, column = 3, padx = 5, pady = 5)
botonResta.grid(row = 4, column = 3, padx = 5, pady = 5)
botonPorciento.grid(row = 1, column = 3, padx = 5, pady = 5)
ventana.mainloop()