python菜鸟学习： 4.购物车演练

# -*- coding: utf-8 -*-
'''
1.启动程序后让用户输入消费额，然后打印商品列表'
2.允许用户根据商品编码购买商品
3.用户选择商品后，检测余额是否够，够则直接扣款，不够就提醒
4.可以随时退出，退出时，打印已购买的商品和余额
'''

# 定义商品列表
global commodList
commodList = {"笔记本": [["华为", 1000, 11], ["戴尔", 2000, 12], ["外星人", 3000, 13], ["联想", 500, 14]], \
              "手机": [["华为", 999, 21], ["小米", 888, 22], ["苹果", 777, 23], ["oppo", 666, 24]], \
              "冰箱": [["格力", 2222, 31], ["海尔", 1111, 32], ["海信", 3333, 33], ["奥克斯", 4444, 34]], \
              "电视": [["长虹", 5555, 41], ["海信", 6666, 42], ["小米", 8888, 43], ["夏新", 3333, 44]]}


# 得到用户余额
def getUserMoney():
    money = int(input("请输入您的余额：\n"))
    return money


# 显示物品菜单
def showcommodity():
    print("欢迎来到新时代购物广场:您可以任意限购以下商品：", end="\n")
    for commodType in commodList.keys():
        print(commodType + ":", end="\n")
        commodName = commodList[commodType]
        # print(commodName) //[['华为', 1000], ['戴尔', 2000], ['外星人', 3000], ['联想', 500]]
        for commodName1 in commodName:
            print("品牌：{_commodName}<---->价格：{_commodPrice}<---->商品编码：{_commodNumber}" \
                  .format(_commodName=commodName1[0], _commodPrice=commodName1[1], \
                          _commodNumber=commodName1[2]))


# 根据商品编码得到商品价格及商品名称
def getCommdityPrice(commodNum):
    # 判断商品是否存在
    if commodNum != 99999:
        flag = False
        # 根据物品编码得到物品
        for commodName in commodList.keys():
            for commodNum1 in commodList[commodName]:
                if commodNum1[2] == commodNum:
                    flag = True
                    return commodNum1[1], commodNum1[0]
        if flag == False:
            print("{_commodNum}商品编码不存在".format(_commodNum=commodNum))
    else:
        print("结束购物！！")


# 增加购物车
def shoppingGet():
    # 定义用户余额
    UserMoney1 = getUserMoney()
    # 定义用户购买的物品列表
    UserCommList = []
    showcommodity()
    while True:
        # 购买商品列表
        shoppNum = int(input("请选择你想购买的物品编码,如果输入 99999 则表示本次选购已完成！：\n"))
        # 商品名称和商品价格
        try:
            commodNum = getCommdityPrice(shoppNum)[1]
            money1 = int(getCommdityPrice(shoppNum)[0])
        except Exception as e:
            print("")
        if shoppNum == 99999:
            print(UserCommList, UserMoney1)
            UserCommListName = []
            for commodNo in UserCommList:
                UserCommListName.append(getCommdityPrice(commodNo)[1])
            print(
                "您现在购买的商品：{_UserCommList},余额为：{_UserMoney1}".format(_UserCommList=UserCommListName,
                                                                    _UserMoney1=UserMoney1))
            print()
            break
        # 判断money够用
        elif money1 <= UserMoney1:
            # 如果足够则把商品加到购物车列表中
            UserCommList.append(shoppNum)
            # 增加后，扣款
            UserMoney1 = UserMoney1 - money1
            print(
                "您现在购买的商品：{_UserCommList},余额为：{_UserMoney1}".format(_UserCommList=UserCommList, _UserMoney1=UserMoney1))
        # 判断money不够用
        else:
            # 如果余额不足以购买则输出
            print("您的余额为{_Money},不足以购买<{_commodNum}>".format(_Money=UserMoney1, _commodNum=commodNum))


if __name__ == '__main__':
    shoppingGet()