python-购物车程序练习

Posted 2021-01-23 运维小菜鸟的开发之路

购物车练习题：
需求如下
1、启动程序后，让客户输入自己的金额，并打印出商品列表
2、让客户根据商品编号，选择商品
3、选择完成后，检测余额是否够，够就直接扣款并将商品保存至字典中，如果余额不足提示用户进行充值
4、用户可以随时选择退出，退出时打印自己购买的商品 ，消费总额和余额

product_list = [
　　["台式电脑", 4992],
　　["手机", 2999], 
　　["移动硬盘", 390],
　　["U盘", 100], 
　　["笔记本", 6223],
　　["鼠标", 200], 
　　["键盘", 492]
]

####################################################
product_list = [["台式电脑", 4992],["手机", 2999], ["移动硬盘", 390],["U盘", 100], ["笔记本", 6223],["鼠标", 200], ["键盘", 492]]
shopping = {}
bbb= 0
# sho = {
#     "台式电脑":{"price":4992,"num":3}
# }
salary = input("请输入您的工资：")
if salary.isdigit():
    salary = int(salary)
    while True:
        # for i in product_list:
        #     print(product_list.index(i),i)
        for a, b in enumerate(product_list):
            print(a, b)
        user_choice = input("选择要买的商品序列（q/Q结算）：")
        if user_choice.isdigit():   # 判断输入的是否是数字
            user_choice = int(user_choice)  # 将str数字转为int类型
            if user_choice < len(product_list) and user_choice >= 0:  # 判断数字时候是列表序列的范围
                # 判断钱够不够
                p_item = product_list[user_choice]  # 这个是一个商品["台式电脑", 4992]
                if p_item[1] <= salary:  # 判断商品列表中的价格和你的工资的关系
                    if p_item[0] in shopping.keys():
                        shopping[p_item[0]]["num"] += 1
                        salary -= p_item[1]  # 将工资总数减去你选的商品的价格
                        print(shopping)
                        print("Added %s into shopping cart, yu e is %s" % (p_item, salary))
                    else:
                        shopping[p_item[0]] = {"price":p_item[1],"num":1}  # 如果是你工资大于等于商品价格，则将商品加入到shopping空列表中
                        salary -= p_item[1]  # 将工资总数减去你选的商品的价格
                        print("Added %s into shopping cart, yu e is %s" %(p_item,salary))
                        print(shopping)
                else:
                    print("资产不足，请充值：当前商品价格为：%s ,您资产剩余为： %s"%(p_item,salary))
                    chong = input("充值请输入c,结算请输入q,输入其他字符为无效")
                    if chong == "c":
                        b = input("请输入您要充值的金额：")
                        if b.isdigit():
                            b = int(b)
                            salary += b
                            print("您充值资产为：%s ,当前资产为 %s ,购物车列表为：%s" %(b,salary,shopping))
                            continue
                    elif chong == "q":
                        print("您购买的商品有：%s ,您的资产剩余 %s" % (shopping, salary))
                        for k, v in shopping.items():
                            n = v["price"]
                            m = v["num"]
                            zong = n * m
                            bbb = bbb + zong
                        print("总消费为: %s" % (bbb))
                        #for k,v in cat.items():
                        # print(k,v)
                        # n = v[‘num‘]
                        # m = v[‘one_proce‘]
                        # all_sum = n * m
                        # all_price = all_price + all_sum
                        exit()
                    else:
                        continue
            else:
                print("请输入正确的商品序号")
        elif user_choice.lower() == "q":
            print("您购买的商品有：%s ,您的资产剩余 %s" %(shopping,salary))
            for k,v in shopping.items():
                n = v["price"]
                m = v["num"]
                zong = n * m
                bbb = bbb + zong
            print("总消费为: %s" %(bbb))
            exit()
        else:
            print("请输入正确的商品序号")