python 趣题

一辆车开到停车场，看到一个显示屏，屏幕上显示剩余车位数， 并随机显示一个可以的车位号？用面向对象方法实现编程。本人实现方法：

#!/usr/bin/env python# -*- coding:utf-8 -*- # Author: json_steve# 一辆车开到停车场，看到一个显示屏，屏幕上显示剩余车位数，# 并随机显示一个可以的车位号？用面向对象方法实现编程。import randomclass Car(object):    sum_carport = [1, 2, 3]    carts = []    def __init__(self, num):        self.name = num        print('剩余空车位', self.sum_carport)    def look_for_parking(self):        cart_port_dict = {}        if 0 < len(self.sum_carport):            park = random.choice(self.sum_carport)            cart_port_dict[self.name] = park            Car.carts.append(cart_port_dict)            self.sum_carport.remove(park)            print('%s占用车位%s' % (self.name, park))        else:            print('%s无车位' % self.name)            print('车位都被占用啦', Car.carts)cart1 = Car('拖拉机')cart1.look_for_parking()print('------------------------')cart2 = Car('夏利')cart2.look_for_parking()print('=========================')cart3 = Car('吉普')cart3.look_for_parking()print('=========================')cart4 = Car('毛驴')cart4.look_for_parking()

结果：

剩余空车位 [1, 2, 3]拖拉机占用车位1------------------------剩余空车位 [2, 3]夏利占用车位2=========================剩余空车位 [3]吉普占用车位3=========================剩余空车位 []毛驴无车位车位都被占用啦 [{'拖拉机': 1}, {'夏利': 2}, {'吉普': 3}]