购物车终极版

购物车终极版

#需求：1.可自由管理入购物车
    # 2.当浏览商品时，显示当前页码，以及共几页
    # 3.设计一个返回的操作，即返回上一层函数，或直接退出的选项
    # 4.先登录系统或者注册才能继续后续操作
    # 5.商品浏览时，可选择全部浏览或者分页浏览
    # 6.做一个搜索框，可以搜索需要的商品
    # 7.用户名输错三次便强制退出，1分钟后才可以继续输入，并显示剩余可输入的次数
    # 8.对管理员和用户做区分
def blacklist():
    '''
    拉进黑名单的操作
    :return:
    pass
    '''
    name = input("请输入你要拉黑的姓名：")
    with open("dongjie.txt",'a',encoding = "utf-8")as f:
        f.write(name)
    f.close()


def serch():
    '''
    商品搜索
    :return:
    '''
    while True:
        select = input("请输入要搜索的内容(n返回)：")
        if select.upper() == "N":
            return run()
        with open("zidian",'r',encoding="utf-8")as f:
            val = f.readlines()
            lis = [item.strip("\n") for item in val]
            flag = False
            for i in lis:
                v = eval(i)
                if v.get("title") == select:
                    flag = True
                    print(v)
            if not flag:
                print("所搜索的内容不存在，请重新输入吧")
                continue


def log():
    '''
    用户登录
    :return:
    部分返回主函数
    '''
    count = 1
    import time
    while True:
        print("***************用户登录***************")
        user_name = input("请输入用户名(n返回)：")
        if user_name.upper() == "N":
            return run()
        user_pwd = input("请输入登录密码：")
        count = count + 1
        with open("dongjie.txt", 'r', encoding='utf-8') as f:
            user_info = f.readlines()
            new_user_info = [item.strip() for item in user_info if item.strip()]  # strip与if的搭配也要值得注意
            if user_name in new_user_info:
                print("你的账户已被冻结，强制退出")
                return
        f.close()
        user_exit = False
        flag = False
        with open("zhuce", "r", encoding="utf-8") as f1:
            for line in f1:
                user_name1, user_pwd1, time1 = line.split("|")
                #与注册的格式有关，应先注册
                if user_name == user_name1:
                    user_exit = True
                if user_name == user_name1 and user_pwd == user_pwd1:
                    flag = True
                    print("你已经登入系统")
                    choice = input("请选择接下来的服务类型（n返回）\n(1：商品浏览 2：我的购物车 3:搜索商品)：")
                    if choice.upper() == "N":
                        return log()
                    num = int(choice)
                    dic = {1: browse, 2: shopping_car, 3:serch}
                    func = dic.get(num) #调用次一级函数
                    func()
            if count > 3:
                print("登录次数已用完，账户冻结1分钟，1分钟后重新输入")
                time.sleep(60) #账户冻结60秒
                continue
            if not user_exit:
                print("用户名不存在，请重新输入,剩余登录次数%s"%(4-count))
                continue
            if not flag:
                print("用户名或密码错误,剩余登录次数%s"%(4-count))


def register():
    '''
    用户注册
    :return:
    部分返回主函数
    '''
    from datetime import datetime
    print("---------用户注册-----------")
    while True:
        user_name = input("请输入用户名(N返回)：")
        if user_name.upper() == "N":
            return run()
        user_pwd = input("请输入登录密码：")
        creat_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
        with open("zhuce", 'a', encoding='utf-8') as f:
            line = "%s|%s|%s\n" % (user_name, user_pwd, creat_time)
            f.write(line)
        f.close()


def browse():
    '''
    商品浏览
    :return:
    部分返回主函数
    '''
    def select1():
        '''
        全局浏览
        :return:
        pass
        '''
        with open("zidian", 'r', encoding='utf-8') as f:
            result = f.readlines()
            val = [item.strip("\n") for item in result]
            for i in val:
                print(i)
    def select2():
        '''
        分页浏览
        :return:
        pass
        '''
        with open("zidian", 'r', encoding='utf-8') as f:
            lis = []
            count = 0
            count_num = len(f.readlines())  # 生成一个计数器
            number = count_num // 4 + 1
            f.seek(0)
            while True:
                choice = input("请输入要浏览的页码(n返回)：")  # 大于0切合法
                if choice.upper() == "N":
                    return browse()
                num = int(choice)
                if num > number:
                    print("最大页码为%s,请重新输入" % number)
                    continue
                star_info = (num - 1) * 4
                end_info = num * 4
                for line in f:
                    count += 1
                    if count > star_info:
                        lis.append(line)
                    if count >= end_info:
                        break
                print("当前页码为%s,共%s页" % (num, number), )
                for i in lis:
                    val = i.strip("\n")
                    print(val)
        f.close()

    select = input("请选择你的浏览方式(1.全局浏览 2.分页浏览）：")
    dic = {"1":select1,"2":select2}#触发不同的函数
    val = dic.get(select)
    val()


def shopping_car():
    '''
    我的购物车
    :return:
    pass
    '''
    # 购物车
    SHOPPING_CAR = {}
    GOODS_LIST = []

    with open("zidian", 'r', encoding ="utf-8") as f:
        for item in f:
            GOODS_LIST.append(eval(item))
            ###需要加装饰器
    for i in range(len(GOODS_LIST)):
        print(i + 1, GOODS_LIST[i]["title"])
    while True:
        choice = input("请选择商品的序列号(n返回)：")
        if choice.upper() == "N":
            return run()
        num = int(input("请选择需要商品的数量："))
        row_info = GOODS_LIST[int(choice) - 1]
        if row_info["id"] in SHOPPING_CAR:  # 标志物
            SHOPPING_CAR[row_info["id"]]["count"] += num  # 需要定义SHOPPING_CAR的类型
        else:
            SHOPPING_CAR[row_info['id']] = {"title": row_info["title"], "price": row_info["price"],
                                            "count": num}  # 键值对的生成
        print(SHOPPING_CAR)

def see_white():
    with open("zhuce","r",encoding="utf-8")as f:
        result = f.read()
        print(result)
    f.close()
def see_black():
    with open("dongjie.txt","r",encoding="utf-8")as f:
        result = f.read()
        print(result)
    f.close()


def adm():
    '''
    管理员程序主接口
    :return:
    pass
    '''
    question = input("口令？（提示：who is u dad?）：")
    if question == "杨子良":
        chioce = input("请选择服务类型(n退出程序):1.查看用户信息 2.查看黑名单 3.增加黑名单：")
        if chioce.upper() == "N":
            return
        num = int(chioce)
        dic = {1: see_white, 2: see_black,3:blacklist }
        func = dic.get(num)
        func()


def run():
    '''
    用户主接口
    :return:
    部分退出程序
    '''
    print("1:用户登录，2：用户注册")
    chioce = input("请选择服务的序号(n退出程序)：")
    if chioce.upper() == "N":
        return
    num  = int(chioce)
    dic = {1:log,2:register,}
    func = dic.get(num)
    func()

def main():
    '''
    程序入口
    :return:
    '''
    print("*****************************欢迎来到我的购物商城*****************************")
    select = input("你是？1：客户  2：管理员 ：" ) #发出询问，辨别身份
    dic = {"1":run,"2":adm}
    func = dic.get(select)
    func()
if __name__ == '__main__':
    main()

总结：

• 优点：
  • 要求基本完成，而且内容相对完备
• 缺点：
  • 不够高级。基本还是函数的堆砌，没有用到装饰器之类的