Returns rectangle center

def get_center(self):
        """Returns rectangle center"""

        lr_x, lr_y = self.get_vec_lr()
        tb_x, tb_y = self.get_vec_tb()

        center_x = self.x + (lr_x + tb_x) / 2.0
        center_y = self.y + (lr_y + tb_y) / 2.0

        return center_x, center_y