from tkinter import *
import tkinter as tk
def add():
res = int(num1.get())+int(num2.get())
label_text.set(res)
def minus():
res = int(num1.get())-int(num2.get())
label_text.set(res)
count = Tk()
label_text = StringVar();
label_text.set("0")
result = Label(count, text="", textvariable=label_text).grid(row=0, column=4)
num1 = Entry(count)
num1.grid(row=0, column=0)
num2 = Entry(count)
num2.grid(row=0, column=2)
button1 = tk.Button(count,text='minus', command=minus, height=5, width=10)
button1.grid(row=1,column=0)
button2 = tk.Button(count,text='add', command=add, height=5, width=10)
button2.grid(row=2,column=0)
mainloop()
