Python-сообщество

 from tkinter import *
def calculator():
	if var_enter_b in ('+','-','*','/'):
		global var_calc
		var_calc=0
		if var_enter_b=='+':
			var_calc=var_enter_a+var_enter_c
			result=Label(win_calc,text=var_calc).place(x=200,y=20)
		elif var_enter_b=='-':
			var_calc=var_enter_a-var_enter_c
			result=Label(win_calc,text=var_calc).place(x=200,y=20)
		elif var_enter_b=='*':
			var_calc=var_enter_a*var_enter_c
			result=Label(win_calc,text=var_calc).place(x=200,y=20)
		elif var_enter_b=='/':
			var_calc=var_enter_a/var_enter_c
			result=Label(win_calc,text=var_calc).place(x=200,y=20)
	else:
		result=Label(win_calc,text='non').place(x=200,y=20)
def calc():
	global win_calc
	win_calc=Tk()
	win_calc.title('calc')
	win_calc.geometry('400x300')
	text_calc=Label(win_calc,text='Calculator').place(x=0,y=0)
	global var_enter_a
	var_enter_a=Entry(win_calc,width='5').place(x=0,y=20)
	global var_enter_b
	var_enter_b=Entry(win_calc,width='5').place(x=50,y=20)
	global var_enter_c
	var_enter_c=Entry(win_calc,width='5').place(x=100,y=20)
	bth_enter_calc=Button(win_calc,text='=',width='5',command=calculator).place(x=150,y=18)
	root.mainloop()
root=Tk() # Создание окна
root.title('XakConsole') # Название окна
root.geometry('400x300') # Размер окна
root.resizable(width=False,height=False) # выключена возможность изменять размер окна
text_display2=Label(text='Console 1.3 created by Xakep321').place(x=0,y=0)
btn_calc=Button(text='КАЛЬКУЛЯТОР',command=calc).place(x=155,y=20)
btn_exit=Button(text='ВЫХОД',command=exit).place(x=174,y=50)
root.mainloop()

 if b in ('+','-','*','/'):
    if ...
else:
    result=Label(win_calc,text=var_calc).place(x=200,y=20)

 from tkinter import *
def calculator(a,b,c,wroot):
    var_enter_a = float(a.get())
    var_enter_b = b.get()
    var_enter_c = float(c.get())
   
    if var_enter_b in ('+-*/'):
        if var_enter_b == '+':
            var_calc = var_enter_a + var_enter_c
        elif var_enter_b == '-':
            var_calc = var_enter_a - var_enter_c  
        elif var_enter_b == '*':
            var_calc = var_enter_a * var_enter_c
        elif var_enter_b == '/':
            var_calc = var_enter_a / var_enter_c
	
    else:
        var_calc = 'non'
    result = Label(wroot, text = var_calc).place(x=200,y=20)
        
def calc():
	
    win_calc = Tk()
    win_calc.title('calc')
    win_calc.geometry('400x300')
    text_calc = Label(win_calc,text='Calculator').place(x = 0,y = 0)
    var_enter_a = Entry(win_calc,width = '5')
    var_enter_a.place(x = 0,y = 20)
    var_enter_b=Entry(win_calc,width = '5')
    var_enter_b.place(x = 50,y = 20)
    var_enter_c = Entry(win_calc,width = '5')
    var_enter_c.place(x = 100,y = 20)
    bth_enter_calc = Button(win_calc, text = '=',width = '5',
                             command = lambda  : calculator(var_enter_a,var_enter_b,var_enter_c,
                             win_calc)).place(x = 150,y = 18) 
    root.mainloop()
	
root=Tk() # Создание окна
root.title('XakConsole') # Название окна
root.geometry('400x300') # Размер окна
root.resizable(width=False,height=False) # выключена возможность изменять размер окна
text_display2=Label(text='Console 1.3 created by Xakep321').place(x=0,y=0)
btn_calc=Button(text='КАЛЬКУЛЯТОР',command=calc).place(x=155,y=20)
btn_exit=Button(text='ВЫХОД',command=exit).place(x=174,y=50)
root.mainloop()