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__author__ = 'Avinash'
import tkinter as tk
from functools import partial
def call_result(label_result, n1, n2):
num1 = (n1.get())
num2 = (n2.get())
result = int(num1) + int(num2)
label_result.config(text="Result is %d" % result)
return
root = tk.Tk()
root.geometry('400x200+100+200')
root.title('Simple Calculator')
number1 = tk.StringVar()
number2 = tk.StringVar()
labelTitle = tk.Label(root, text="Simple Calculator").grid(row=0, column=2)
labelNum1 = tk.Label(root, text="Enter a number").grid(row=1, column=0)
labelNum2 = tk.Label(root, text="Enter another number").grid(row=2, column=0)
labelResult = tk.Label(root)
labelResult.grid(row=7, column=2)
entryNum1 = tk.Entry(root, textvariable=number1).grid(row=1, column=2)
entryNum2 = tk.Entry(root, textvariable=number2).grid(row=2, column=2)
call_result = partial(call_result, labelResult, number1, number2)
buttonCal = tk.Button(root, text="Calculate", command=call_result).grid(row=3, column=0)
root.mainloop()