exam

main.py

from tkinter import *
eqal = ""
def render():
    global displayLabel
    global eqal
    displayLabel.config(text=eqal)
def one():
    global eqal
    eqal += "1"
    render()
def two():
    global eqal
    eqal += "2"
    render()
def three():
    global eqal
    eqal += "3"
    render()
def four():
    global eqal
    eqal += "4"
    render()
def five():
    global eqal
    eqal += "5"
    render()
def six():
    global eqal
    eqal += "6"
    render()
def seven():
    global eqal
    eqal += "7"
    render()
def eight():
    global eqal
    eqal += "8"
    render()
def nine():
    global eqal
    eqal += "9"
    render()
def zero():
    global eqal
    eqal += "0"
    render()
def plus():
    global eqal
    eqal += "+"
    render()
def minus():
    global eqal
    eqal += "-"
    render()
def enter():
    global eqal
    global displayLabel
    a = eval(eqal)
    eqal = str(a)
    displayLabel.config(text=a)
def ac():
    eqal= ""
    render()
def dev():
    global eqal
    eqal += "/"
    render()
def mul():
    global eqal
    eqal += "*"
    render()
root = Tk()
displayLabel = Label(root, text = "start calculating!", bg= "black", fg = "white")
displayLabel.place(x=30, y= 10, width=150)
button1 = Button(root,text='1', command = one)
button1.place(x=30, y = 50, width =30, height=30)
button2 = Button(root,text='2', command = two)
button2.place(x=60, y = 50, width =30, height=30)
button3 = Button(root,text='3', command = three)
button3.place(x=90, y = 50, width =30, height=30)
button4 = Button(root,text='4', command = four)
button4.place(x=30, y =80, width =30, height=30)
button5 = Button(root,text='5', command = five)
button5.place(x=60, y =80, width =30, height=30)
button6 = Button(root,text='6', command = six)
button6.place(x=90, y =80, width =30, height=30)
button7 = Button(root,text='7', command = seven)
button7.place(x=30, y =110, width =30, height=30)
button8 = Button(root,text='8', command = eight)
button8.place(x=60, y =110, width =30, height=30)
button9 = Button(root,text='9', command = nine)
button9.place(x=90, y =110, width =30, height=30)
button0 = Button(root,text='0', command = zero)
button0.place(x=30, y =140, width =30, height=30)
buttonplus = Button(root,text='+', command = plus)
buttonplus.place(x=60, y =140, width =30, height=30)
buttonminus = Button(root,text='-', command = minus)
buttonminus.place(x=90, y =140, width =30, height=30)
buttonenter = Button(root,text='=', command = enter)
buttonenter.place(x=120, y =140, width =30, height=30)
buttonac = Button(root,text='AC', command = ac)
buttonac.place(x=120, y = 50, width =30, height=30)
buttondev = Button(root,text='/', command = dev)
buttondev.place(x=120, y =80, width =30, height=30)
buttonmul = Button(root,text='x', command = mul)
buttonmul.place(x=120, y =110, width =30, height=30)
root.mainloop()