def CreateSetup(self): self = Gui(debug=False) sw = self.winfo_screenwidth() sh = self.winfo_screenheight() x = (sw/2) - (500/2) y = (sh/2) - (260/2) self.geometry('%dx%d+%d+%d' % (500, 260, x, y)) self.resizable(width=False, height=False) Setup.Create(self) self.mainloop()