2018-12-30 简单购物车程序

def shopping_mall():
    shoppingmall = [
        ["汽      车",1000000],
        ["电      视",5000],
        ["冰      箱",3000],
        ["空      调",6000],
        ["笔记本电脑",8000],
        ["笔  记  本",200]
    ]
    return shoppingmall
def input_saving ():
    while True:
        saving = input("请输入您的存款金额：")
        if saving.isdigit():
            saving = int(saving)
            return saving
            break
        else:
            print("您的输入不正确，请重新输入！")

def input_choice():
    while True:
        choice = input("请输入您想购买的产品序号[q:退出]：")
        if choice.isdigit():
            choice = int(choice)
            if choice > 0 and choice < len(shoppingmall)+1:
                return choice
                break
            else:
                print("您输入的序号不存在，请重新输入！")
        elif choice == "q":
            return choice
            break
        else:
            print("您的输入不正确，请重新输入！")
def Processing_data(shoppingmall,saving):
    shopping_car = []
    he_ji = 0
    while True:
        for i,v in enumerate(shoppingmall,1):
                print(i,v)
        choice = input_choice()
        if choice != "q":
            if saving > shoppingmall[choice-1][1]:
                shopping_car.append(shoppingmall[choice-1])
                saving -= int(shoppingmall[choice-1][1])
                print("购买成功！您的余额为：%.2f元"%saving)
            else:
                print("余额不足，请重新选择！")
        else:
            print('''您已购买如下商品：
------------------''')
            for i,v in enumerate(shopping_car,1):
                he_ji = he_ji + int(v[1])
                print(i,v[0],v[1])
            print('''------------------
合计金额：%.2f元
您的余额为：%.2f元。
谢谢光临，欢迎下次再来！'''%(he_ji,saving))
            break

if __name__ == "__main__":
    shoppingmall = shopping_mall()
    saving = input_saving()
    Processing_data(shoppingmall,saving)