calk

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
#  calculadora
#
import tkinter as tk
from math import sqrt, pi, factorial

def clic(tecla):
    global operador
    operador = operador + str(tecla)
    ingresa_texto.set(operador)

def limpieza():
    global operador
    ingresa_texto.set("0")
    operador = ""


def hacer_cuenta():
    global operador
    try:
        total = str(eval(operador))
    except:
        limpieza()
        total = "ERROR"

    ingresa_texto.set(total)

########  programa principal  ################

ventana = tk.Tk()
ventana.title("CALCULADORA")
ventana.config(width=390, height=600, bg="Light Steel Blue")
ventana.resizable(0,0)


# tamaño de las teclas
ancho = 9
alto = 3

# variable que almacena la cuenta a realizar
operador = ""


# variable para mostrar en la pantalla
ingresa_texto = tk.StringVar()

limpieza()

# pantalla
pantalla = tk.Entry(
                font = ["arial", 20, "bold"],
                width = 22,                  # ancho borde
                bd = 15,                     # grosor borde
                textvariable = ingresa_texto,
                justify = "right",
                bg = "powder blue",
                state = tk.DISABLED
                )
pantalla.place(x=10, y=60)

# primera fila de teclas: 1 2 3 +
boton = tk.Button(text="1", width=ancho, height=alto, command=lambda:clic(1))
boton.place(x=17, y=180)
boton = tk.Button(text="2", width=ancho, height=alto, command=lambda:clic(2))
boton.place(x=107, y=180)
boton = tk.Button(text="3", width=ancho, height=alto, command=lambda:clic(3))
boton.place(x=197, y=180)
boton = tk.Button(text="+", width=ancho, height=alto, bg="sky blue", command=lambda:clic("+"))
boton.place(x=287, y=180)

# segunda fila de teclas: 4 5 6 -
boton = tk.Button(text="4", width=ancho, height=alto, command=lambda:clic(4))
boton.place(x=17, y=240)
boton = tk.Button(text="5", width=ancho, height=alto, command=lambda:clic(5))
boton.place(x=107, y=240)
boton = tk.Button(text="6", width=ancho, height=alto, command=lambda:clic(6))
boton.place(x=197, y=240)
boton = tk.Button(text="-", width=ancho, height=alto, bg="sky blue", command=lambda:clic("-"))
boton.place(x=287, y=240)

# tercera fila de teclas: 7 8 9 x
boton = tk.Button(text="7", width=ancho, height=alto, command=lambda:clic(7))
boton.place(x=17, y=300)
boton = tk.Button(text="8", width=ancho, height=alto, command=lambda:clic(8))
boton.place(x=107, y=300)
boton = tk.Button(text="9", width=ancho, height=alto, command=lambda:clic(9))
boton.place(x=197, y=300)
boton = tk.Button(text="x", width=ancho, height=alto, bg="sky blue", command=lambda:clic("*"))
boton.place(x=287, y=300)

# cuarta fila de teclas: ( 0 ) /
boton = tk.Button(text="(", width=ancho, height=alto, bg="aquamarine", command=lambda:clic("("))
boton.place(x=17, y=360)
boton = tk.Button(text="0", width=ancho, height=alto, command=lambda:clic(0))
boton.place(x=107, y=360)
boton = tk.Button(text=")", width=ancho, height=alto, bg="aquamarine", command=lambda:clic(")"))
boton.place(x=197, y=360)
boton = tk.Button(text="/", width=ancho, height=alto, bg="sky blue", command=lambda:clic("/"))
boton.place(x=287, y=360)

# quinta fila de teclas: RAIZ Punto decimal Potencia %
boton = tk.Button(text="RAIZ", width=ancho, height=alto, bg="aquamarine", command=lambda:clic("sqrt("))
boton.place(x=17, y=420)
boton = tk.Button(text=".", width=ancho, height=alto, command=lambda:clic("."))
boton.place(x=107, y=420)
boton = tk.Button(text="POT", width=ancho, height=alto, bg="aquamarine", command=lambda:clic("**"))
boton.place(x=197, y=420)
boton = tk.Button(text="%", width=ancho, height=alto, bg="sky blue", command=lambda:clic("%"))
boton.place(x=287, y=420)

# sexta fila de teclas: Clear Factorial PI =
boton = tk.Button(text="CL", width=ancho, height=alto, bg="aquamarine", command=limpieza)
boton.place(x=17, y=480)
boton = tk.Button(text="!", width=ancho, height=alto, bg="aquamarine", command=lambda:clic("factorial("))
boton.place(x=107, y=480)
boton = tk.Button(text="PI", width=ancho, height=alto, bg="aquamarine", command=lambda:clic(pi))
boton.place(x=197, y=480)
boton = tk.Button(text="=", width=ancho, height=alto, bg="sky blue", command= hacer_cuenta)
boton.place(x=287, y=480)

ventana.mainloop()