winstonjames2/GUI Caculator using Tkinter Module in Python at main · Winstonjames2/winstonjames2 · GitHub

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#GUI Caculator by @Winston
from tkinter import *

master=Tk()
master.configure(background="silver")
master.geometry("265x225")
master.title("GUI Cacu by Winston")
equation=StringVar()
expression=""

def press(num):
    global expression
    expression = expression+str(num)
    equation.set(expression)

def equalpress():
    try:
        global expression
        total = str(eval(expression))
        equation.set(total)
        expression = ""
    except:
        equation.set("Error")
        expression=""

def clear():
    global expression
    expression=""
    equation.set(expression)

expression_field = Entry(master,textvariable=equation).grid(columnspan=50,ipadx=70)
#Buttons
button1 = Button(master,text="1",width="8",height="2",command=lambda:press(1)).grid(row=1,column=1)
button2 = Button(master,text="2",width="8",height="2",command=lambda:press(2)).grid(row=1,column=2)
button3 = Button(master,text="3",width="8",height="2",command=lambda:press(3)).grid(row=1,column=3)
button4 = Button(master,text="4",width="8",height="2",command=lambda:press(4)).grid(row=2,column=1)
button5 = Button(master,text="5",width="8",height="2",command=lambda:press(5)).grid(row=2,column=2)
button6 = Button(master,text="6",width="8",height="2",command=lambda:press(6)).grid(row=2,column=3)
button7 = Button(master,text="7",width="8",height="2",command=lambda:press(7)).grid(row=3,column=1)
button8 = Button(master,text="8",width="8",height="2",command=lambda:press(8)).grid(row=3,column=2)
button9 = Button(master,text="9",width="8",height="2",command=lambda:press(9)).grid(row=3,column=3)
button0 = Button(master,text="0",width="8",height="2",command=lambda:press(0)).grid(row=4,column=2)
decimal = Button(master,text=".",width="8",height="2",command=lambda:press(".")).grid(row=5,column=1)
button00 = Button(master,text="00",width="8",height="2",command=lambda:press("00")).grid(row=5,column=3)
#Signs
plus = Button(master,text="+",width="8",height="2",command=lambda:press("+")).grid(row=4,column=1)
minus = Button(master,text="-",width="8",height="2",command=lambda:press("-")).grid(row=4,column=3)
multiplier = Button(master,text="x",width="8",height="2",command=lambda:press("*")).grid(row=1,column=4)
divid = Button(master,text="÷",width="8",height="2",command=lambda:press("/")).grid(row=2,column=4)
remainder = Button(master,text="Remainder",width="8",height="2",command=lambda:press("%")).grid(row=3,column=4)
equal = Button(master,text="=",background="blue",width="8",height="2",command=equalpress).grid(row=4,column=4)
Clear = Button(master, text="Clear",background="red",width="8",height="2",command=clear).grid(row=5,column=2)


master.mainloop()