def game(self, boards_file, name): frame = Frame(self.root) frame.pack(fill=BOTH, side=TOP) Label(frame, text="Here is the puzzle " + name + ". Good luck!", foreground="brown", bd=20, font='-weight bold').pack() game = Sudoku.Game(boards_file) game.start() GUI.GUI(self.root, game) self.root.geometry("500x660")