from tkinter import *
def p():
    a =int(e1.get())
    b =int(e2.get())
    c=a+b
    t.configure(text =str(c))



window=Tk()
window.title("Сума")


e1 = Entry(window, width=10)
e2 = Entry(window, width=10)
b = Button(text="+",width=10,command=p)
t = Label(window, width=10,text="")



e1.grid(column=0, row=0)
e2.grid(column=0, row=1)
b.grid(column=0, row=2)
t.grid(column=0, row=3)
window.mainloop()