Tkinter full screen
Try win.state('zoomed'), where win is your Tk window instance.
Edit :
Try something like this. Simply treat this class like a Tk window class.
class Void (tk.Tk) : def __init__ (self, color='black') : tk.Tk.__init__(self) self.wm_state('zoomed') self.config(bg=color) self.overrideredirect(True) self.attributes('-topmost', True)