51_work--购物车

Posted 2020-09-26

import json
import os
import datetime

info = ‘‘‘
*************欢迎光临****************
*                                   *
*        1.按"A"或"a"注册           *
*        2.按"L"或"l"登陆           *  
*        3.按"Q"或"q"退出           *                                  
***********************************
‘‘‘
error_info = ‘输入错误,请重新输入!‘


def save_account(message, filename=‘message.json‘):
    with open(filename, ‘w‘) as f:
        json.dump(message, f)


def load_message(filename=‘message.json‘):
    with open(filename) as f:
        message = json.load(f)
    return message


def add_user():
    message = load_message(‘message.json‘)
    while True:
        username = input(‘请输入用户名>>>:‘).strip()
        if username in message:
            print(‘该用户名已存在，请重新输入!‘)
        else:
            break
    while True:
        pwd1 = input(‘请输入密码>>>:‘)
        pwd2 = input(‘请再次输入密码>>>:‘)
        if pwd1 != pwd2:
            print(‘两次密码不一样，请重新输入>>>:‘)
        else:
            print(‘账户创建成功，请登录！‘)
            message[username] = {‘pwd‘: pwd1, "balance": 0, ‘shopping_list‘: [], ‘shopping_time‘: None}
            save_account(message)
            break

def login():
    message = load_message(‘message.json‘)
    locklist = load_message(‘locklist.json‘)
    print(‘Welcom to shopping system!‘)
    while True:
        account = input(‘请输入你的用户名(按q退出系统)>>>:‘)
        if account in locklist:
            print(‘抱歉，你的账号已被锁定！‘)
            log_out()
        elif account == ‘q‘:
            log_out()
        elif account in message:
            count = 0
            while count < 3:
                pwd = input(‘请输入密码>>>:‘)
                if pwd == message[account][‘pwd‘]:
                    while True:
                        account_balance = get_balance(account)
                        print(‘你的账户余额为\033[32m%d\033[0m‘ % account_balance)
                        command = input(‘按h查询购物历史,按s开始购物,按r充值>>>:‘)
                        if command == ‘h‘:
                            if message[account][‘shopping_time‘] != None:
                                get_shopping_history(account)
                            else:
                                print(‘您在本商城没有购物历史!‘)
                        elif command == ‘s‘:
                            shopping(account)  # 开始购物
                        elif command == ‘r‘:
                            recharge(account)
                        else:
                            print(error_info)
                else:
                    count += 1
                    print(‘密码错误，你还有%d次机会‘ % (3 - count))
            locklist.setdefault(account)
            print(‘你的账号已被锁定！‘)
            save_account(locklist, ‘locklist.json‘)
            log_out()
        else:
            print(‘该用户不存在！按b返回上一层或按q退出‘)


def log_out(account=None):
    if account != None:
        get_shopping_history(account)
    exit(‘Thank you so much for coming!‘)


def get_balance(account):
    message = load_message(‘message.json‘)
    account_balance = message[account][‘balance‘]
    return account_balance


def shopping(account):
    goods = {‘家电类‘: {‘电视‘: {‘小米电视‘: 3999, ‘乐视电视‘: 4299},
                     ‘空调‘: {‘格力空调‘: 8999, ‘海尔空调‘: 6000},
                     ‘冰箱‘: {‘美的冰箱‘: 5099, ‘西门子冰箱‘: 4599}},
             ‘3C类‘: {‘电脑‘: {‘联想笔记本‘: 6888, ‘mac air‘: 8009},
                     ‘手机‘: {‘小米5‘: 1999, ‘iPhone6‘: 5299}},
             ‘生活类‘: {‘鞋子‘: {‘NIKE篮球鞋‘: 899, ‘安踏‘: 399},
                     ‘T恤‘: {‘森马‘: 89, ‘真维斯‘: 75, ‘优衣库‘: 97}}}
    while True:
        for each in enumerate(goods.keys()):
            print(each)  # 打印第一级菜单(第一级keys)
        choose = input(‘请输入您要选择的物品分类名(输入q退出):‘).strip()
        str1 = ‘‘
        if choose in goods:
            for each in enumerate(goods[choose].keys()):
                print(each)  # 打印第二级菜单(第二级keys)
                str1 += (each[1] + ‘\n‘)
            str1 += ‘:‘
            while True:
                c_name = input("请输入您要选择的%s分类名称(输入b返回上级菜单输入q退出):\n%s"
                               % (choose, str1)).strip()
                str2 = ‘‘
                if c_name == ‘b‘:
                    break
                elif c_name == ‘q‘:
                    log_out(account)
                elif c_name in goods[choose]:
                    for each in goods[choose][c_name].keys():
                        print(each, goods[choose][c_name][each])  # 打印第三级菜单(物品菜单和价格)
                        str2 += (each + ‘\n‘)
                    str2 += ‘:‘
                    while True:
                        p_name = input("请输入您要购买的物品名称(输入b返回上级菜单,q退出,h查询购物清单):\n%s"
                                       % str2).strip()
                        if p_name == ‘b‘:
                            break
                        elif p_name == ‘q‘:
                            log_out(account)
                        elif p_name == ‘h‘:
                            database = load_message()
                            if database[account][‘shopping_time‘] != None:
                                get_shopping_history(account)
                            else:
                                print(‘您在本商城没有购物历史!‘)
                        elif p_name in goods[choose][c_name]:
                            while True:
                                num = input(‘请输入您要购买的数量:‘).strip()
                                if num.isdigit():
                                    num = int(num)
                                    account_balance = get_balance(account)  # 获取物品单价
                                    price = (goods[choose][c_name][p_name]) * num  # 单价*数量
                                    if account_balance >= price:  # 余额大于商品价格才能购买
                                        set_balance(account, price)
                                        print(‘您成功购买%d件商品:%s!‘ % (num, p_name))
                                        set_shopping_list(account, p_name, num)  # 将所购买的物品保存到文件
                                        account_balance = get_balance(account)  # 获取账户余额
                                        print(‘您的账户余额为\033[31m%d\033[0m元‘ % account_balance)
                                        set_shopping_time(account)
                                        break  # 购买完返回上级菜单
                                    else:
                                        print(‘您的账户余额不足,请您及时充值!‘)
                                        break  # 余额不足返回上级菜单
                                else:
                                    print(error_info)
                        else:
                            print(error_info)

                else:
                    print(‘输入错误,请重新输入‘)

        elif choose == ‘q‘:
            log_out(account)
        else:
            print(‘输入错误,请重新输入‘)


def get_shopping_history(account):
    database = load_message()
    history = database[account][‘shopping_list‘]
    l1 = []
    for each in history:
        if each not in l1:
            l1.append(each)
    for each in l1:
        count = history.count(each)
        date = get_datetime(account)
        print(‘您于%s购买了%d件%s‘ % (date, count, each))


def set_shopping_time(account):
    message = load_message()
    d1 = datetime.datetime.now()
    d2 = d1.strftime(‘%Y-%m-%d %H:%M:%S‘)
    message[account][‘shopping_time‘] = d2
    save_account(message)


def get_datetime(account):
    message = load_message()
    data = message[account][‘shopping_time‘]
    return data

def set_shopping_list(account, c_name, num):
    message = load_message()
    for i in range(num):
        message[account][‘shopping_list‘].append(c_name)
        save_account(message)

def set_balance(account, price):
    message = load_message()
    message[account][‘balance‘] -= price
    save_account(message)


def recharge(account):
    message = load_message()
    while True:
        num = input(‘请输入您要充值的金额:‘)
        if num.isdigit():
            message[account]["balance"] += int(num)
            save_account(message)
            account_balance = get_balance(account)
            print(‘您已成功充值,您的余额为\033[32m%d\033[0m元‘ % account_balance)
            return None
        else:
            print(‘您的输入有误,请重新输入!‘)

def main():
    while True:
        print(info)
        commend = input(‘请输入操作指令>>>:‘)
        if commend.upper() == ‘A‘:
            add_user()
        elif commend.upper() == ‘L‘:
            login()
        elif commend.upper() == ‘Q‘:
            log_out()
        else:
            print(error_info.center(40,‘-‘))

if __name__ == "__main__":
    main()