code: def _mouse_pointer_moved(self, x, y):
          '''GUI callback for mouse moved'''
          self._namespace['MOUSEX'] = x
          self._namespace['MOUSEY'] = f _mouse_pointer_moved(self, x, y):
          '''GUI callback for mouse moved'''
          self._namespace['MOUSEX'] = x
          self._namespace['MOUSEY'] = y
docs: GUI callback for mouse moved