def _get_xy_scaling_parameters ( self ) : return self . mx , self . bx , self . my , self . by
python limits both x and y xylim
Get the X / Y coordinate limits for the full resulting image
def _get_xy_scaling_parameters(self):
        """Get the X/Y coordinate limits for the full resulting image"""
        return self.mx, self.bx, self.my, self.by