calculaloca

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

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

def clic(tecla):
    global operador # el mismo operador de la función principal
    operador = operador + str(tecla)
    ingresa_texto.set(operador)

def operacion():
    global operador
    try:
        resultado = str(eval(operador))
    except Exception:
        limpieza()
        resultado = "ERROR"
    finally:
        ingresa_texto.set(resultado)



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

# variable que se muestra en pantalla
ingresa_texto = tk.StringVar()

# tamaño de las teclas
ancho = 10
alto = 3

# inicializo la calculadora
limpieza()




##### pantalla ########

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

### 1ª fila de teclas : 1 2 3 + #############
boton1 = tk.Button(text="1",width=ancho,height=alto,command=lambda:clic(1))
boton1.place(x=17,y=180)
boton2 = tk.Button(text="2",width=ancho,height=alto,command=lambda:clic(2))
boton2.place(x=107,y=180)
boton3 = tk.Button(text="3",width=ancho,height=alto,command=lambda:clic(3))
boton3.place(x=197,y=180)
botonSuma = tk.Button(text="+",width=ancho,height=alto,bg="white",command=lambda:clic('+'))
botonSuma.place(x=287,y=180)


### 2ª fila de teclas : 4 5 6 - #############
boton4 = tk.Button(text="4",width=ancho,height=alto,command=lambda:clic(4))
boton4.place(x=17,y=240)
boton5 = tk.Button(text="5",width=ancho,height=alto,command=lambda:clic(5))
boton5.place(x=107,y=240)
boton6 = tk.Button(text="6",width=ancho,height=alto,command=lambda:clic(6))
boton6.place(x=197,y=240)
botonResta = tk.Button(text="-",width=ancho,height=alto,bg="white",command=lambda:clic('-'))
botonResta.place(x=287,y=240)

### 3ª fila de teclas : 7 8 9 x #############
boton7 = tk.Button(text="7",width=ancho,height=alto,command=lambda:clic(7))
boton7.place(x=17,y=300)
boton8 = tk.Button(text="8",width=ancho,height=alto,command=lambda:clic(8))
boton8.place(x=107,y=300)
boton9 = tk.Button(text="9",width=ancho,height=alto,command=lambda:clic(9))
boton9.place(x=197,y=300)
botonMult = tk.Button(text="x",width=ancho,height=alto,bg="white",command=lambda:clic('*'))
botonMult.place(x=287,y=300)

### 4ª fila de teclas : ( 0 ) / #############
botonParenIzq = tk.Button(text="(",width=ancho,height=alto,bg="gainsboro",command=lambda:clic('('))
botonParenIzq.place(x=17,y=360)
botonCero = tk.Button(text="0",width=ancho,height=alto,command=lambda:clic(0))
botonCero.place(x=107,y=360)
botonParenDer = tk.Button(text=")",width=ancho,height=alto,bg="gainsboro",command=lambda:clic(')'))
botonParenDer.place(x=197,y=360)
botonDiv = tk.Button(text="/",width=ancho,height=alto,bg="white",command=lambda:clic('/'))
botonDiv.place(x=287,y=360)

### 5ª fila de teclas : Raiz, coma, potencia, % #############
botonRaiz = tk.Button(text="RAIZ",width=ancho,height=alto,bg="gainsboro",command=lambda:clic('sqrt('))
botonRaiz.place(x=17,y=420)
botonComa = tk.Button(text=".",width=ancho,height=alto,command=lambda:clic('.'))
botonComa.place(x=107,y=420)
botonPot = tk.Button(text="POWER",width=ancho,height=alto,bg="gainsboro",command=lambda:clic('**'))
botonPot.place(x=197,y=420)
botonResto = tk.Button(text="%",width=ancho,height=alto,bg="gainsboro",command=lambda:clic('%'))
botonResto.place(x=287,y=420)

### 6ª fila de teclas : CLEAR, Factorial, PI, = #############
botonClear = tk.Button(text="CL",width=ancho,height=alto,bg="gainsboro",command=limpieza)
botonClear.place(x=17,y=480)
botonFact = tk.Button(text="!",width=ancho,height=alto,bg="gainsboro",command=lambda:clic('factorial('))
botonFact.place(x=107,y=480)
botonPI = tk.Button(text="PI",width=ancho,height=alto,bg="gainsboro",command=lambda:clic(pi))
botonPI.place(x=197,y=480)
botonIgual = tk.Button(text="=",width=ancho,height=alto,bg="gainsboro",command=operacion)
botonIgual.place(x=287,y=480)

ventana.mainloop()