# Visar hur man lägger upp knappar i en grid
# Vilken knapp avslutar?

from tkinter import *

class Matris(Frame):

    def skapaKnappar(self):
        self.knapplista = []
        for nr in range(12):
            ny = Button(self, text = str(nr+1))
            ny.grid(row=nr//3, column=nr%3)
            self.knapplista.append(ny)
        self.knapplista[2]["command"] = self.quit

    def __init__(self, master = None):
        Frame.__init__(self, master)
        self.grid()
        self.skapaKnappar()

rot = Tk()
m = Matris(rot)
m.mainloop()
rot.destroy()