create calculator in python
from tkinter import * import random import time def btnClick(numbers): global operator operator = operator + str(numbers) text_Input.set(operator) def bcd(): global operator operator = "" text_Input.set("") def bei(): global operator sumup = str(eval(operator)) text_Input.set(sumup) operator = sumup root = Tk() root.title("Calculator") root.resizable(False, False) operator = "" text_Input = StringVar() #AnsShow textDisplay = Entry(root, font = ('arial', 20, 'bold'), textvariable = text_Input, bd = 30, insertwidth = 4, bg = "red", justify = 'right') textDisplay.grid(columnspan = 4) #button btn7 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "7", command = lambda:btnClick(7)).grid(row = 1, column = 0) btn8 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "8", command = lambda:btnClick(8)).grid(row = 1, column = 1) btn9 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "9", command = lambda:btnClick(9)).grid(row = 1, column = 2) Add = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "+", command = lambda:btnClick("+")).grid(row = 1, column = 3) #============================================================================================================================# btn4 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "4", command = lambda:btnClick(4)).grid(row = 2, column = 0) btn5 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "5", command = lambda:btnClick(5)).grid(row = 2, column = 1) btn6 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "6", command = lambda:btnClick(6)).grid(row = 2, column = 2) Sub = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "-", command = lambda:btnClick("-")).grid(row = 2, column = 3) #===============================================================================================================================# btn1 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "1", command = lambda:btnClick(1)).grid(row = 3, column = 0) btn2 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "2", command = lambda:btnClick(2)).grid(row = 3, column = 1) btn3 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "3", command = lambda:btnClick(3)).grid(row = 3, column = 2) Multiply = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "*", command = lambda:btnClick("*")).grid(row = 3, column = 3) #==================================================================================================================================# btn0 = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "0", command = lambda:btnClick(0)).grid(row = 4, column = 0) equal = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "=", command = bei).grid(row = 4, column = 1) divide = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "/", command = lambda:btnClick("/")).grid(row = 4, column = 2) clear = Button(root, padx = 16, bd = 8, fg = "black", bg = "red", font = ('arial', 20, 'bold'), text = "c", command = bcd).grid(row = 4, column = 3) root.mainloop()