代码

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# @FileName  :shopping.py
# @Time      :2020/3/1 14:14
# @Author    :anqixiang
# @Function  :模拟购物车功能
'''
1.启动程序，输入工资，打印商品列表
2.用户根据商品编号选择商品
3.选择商品后，检测余额是否足够，够就付款，不够提示
4.选择q退出本次购物
5.选择b付钱，并打印商品和消费金额及余额
'''

def cecho(num,content):
    print('\033[%sm%s\033[0m' %(num, content))

#商品列表
commodity = [
    ('Iphone', 8000),
    ('vivo', 4000),
    ('huawei', 3000)
]

#打印商品清单
def shopping_list():
    print('%-10s%-8s%-12s' % ('序号', '名字', '价格'))
    for index, value in enumerate(commodity):
        print('%-12s%-10s%-8s' % (index, value[0],value[1]))
    print("q:   退出")
    print("b:   结账")

#购买商品
def choice_shop(salary):
    balance = salary
    shopping_trolley = []           #购物车商品
    shopping_list()
    while True:
        choice = input("请选择你喜爱的商品:")
        if choice == 'q':
            cecho(92, "欢迎下次光临！")
            break
        elif choice.isdigit():
            choice = int(choice)
            if 0<= choice < len(commodity):
                shop_item = commodity[choice]
                if shop_item[1] > balance:
                    print("余额不足，当前余额为\033[31m%s\033[0m" % balance)
                else:
                    balance = balance - shop_item[1]
                    print('%s加入购物车，余额为\033[31m%s\033[0m' % (shop_item[0], balance))
                    shopping_trolley.append(shop_item)
            else:
                cecho(31, '输入有误!!!')
        elif choice == 'b':
            if shopping_trolley == []:
                print("您的购物车空空如也！")
            else:
                for i in shopping_trolley:
                    print('_' * 40)
                    print("您的购物清单如下：")
                    print('%-10s%-8s%-12s' % ('序号', '名字', '价格'))
                    for index, value in enumerate(shopping_trolley):
                        print('%-12s%-10s%-8s' % (index, value[0], value[1]))
                    print("商品总计%s,您的余额为%s" % (salary - balance, balance))
                    cecho(92, "欢迎下次光临！")
                    exit(0)
        else:
            cecho(31, '输入有误!!!')

if __name__ == "__main__":
    salary = input("输入您的工资:")
    if salary.isdigit():
        salary = int(salary)
        choice_shop(salary)
    else:
        cecho(31, '输入有误!!!')
    run_code = 0

效果图

Python之模拟购物车_python