Python练习题二

需求一:
用户名和密码存放于文件中，格式为：rocco|rocco123
启动程序后，先登录，登录成功则让用户输入工资,然后打印商品列表，失败则重新登录，超过三次则退出程序
允许用户根据商品编号购买商品
用户选择商品后，检测余额是否够，够就直接扣款，不够就提醒
可随时退出，退出时，打印已购买商品和余额

commodity = [
    ['1', '可口可乐', 3.5],
    ['2', '奶茶', 15],
    ['3', '鸡排', 20],
    ['4', '薯片', 5],
    ['5', '冰棒', 5],
    ['6', 'time', 9999999999]
]

count = 0
tag = True
select_name = []
u_salary = []
while tag:
    if count == 3:
        print("失败次数过多，退出")
        break
    inp_user = input("输入用户名：").strip()
    inp_pwd = input("输入密码：").strip()

    with open('Text', 'r', encoding='utf-8') as usepwd:
        for i in usepwd:
            user = i.strip().split('|')
            username = user[0]
            pwd = user[1]
            if inp_user == username and inp_pwd == pwd:
                print(f"{username} :用户登陆成功")
                # tag = False

                while tag:

                    salary = input("请输入你的工资: ").strip()
                    u_salary.append(salary)
                    if salary.replace(".", "", 1).isdigit():
                        print("sum ok")

                        print("商品列表".center(50, "="))
                        print("\t\t\t商品ID\t商品名\t\t单价")
                        for i in commodity:
                            print("\t\t\t{id}\t\t{mz}\t\t{jq}".format(id=i[0], mz=i[1], jq=i[2]))
                        while tag:
                            mai = input("输入商品编号购买｜输入b退出：").strip()
                            if mai == 'b':
                                tag = False
                                break
                            for v in commodity:
                                print(v)
                                if mai in v:
                                    print(f"是否购买: {v[1]}")
                                    if int(v[2]) <= int(salary):
                                        select_name.append(v)
                                        print(f"{salary}你购买前的余额")
                                        salary = int(salary) - int(v[2])
                                        print(f"{salary}你购买后的余额")
                                    else:
                                        print("余额不足，请充值！！")
            break
        else:
            print("登陆失败，再次尝试！")
            count += 1
print(f"最终商品 {select_name} \n最终余额 {salary}")

需求二：

打印二级三级四级菜单

area = {
    '北京': {
        '海淀': {
            '五道口': {
                'soho': {},
                '网易': {},
                'google': {}
            },
            '中关村': {
                '爱奇艺': {},
                '汽车之家': {},
                'youku': {},
            },
            '上地': {
                '百度': {},
            },
        },
        '昌平': {
            '沙河': {
                '老男孩': {},
                '北航': {},
            },
            '天通苑': {},
            '回龙观': {},
        },
        '朝阳': {},
        '东城': {},
    },
    '上海': {
        '闵行': {
            "人民广场": {
                '炸鸡店': {}
            }
        },
        '闸北': {
            '火车战': {
                '携程': {}
            }
        },
        '浦东': {},
    },
    '山东': {},
}

case = True
while case:
    read_case = area
    for city in read_case:
        print(city)

    inp_city = input("输入查询的城市: ").strip()
    if inp_city == "back":
        break
    if inp_city == "quit":
        case = False
        continue
    if inp_city not in read_case:
        print("城市不存在，查证后重新输入！！")
        continue

    while case:
        read_case_2 = read_case[inp_city]
        for Area in read_case_2:
            print(Area)

        inp_Area = input("输入城市所在区：").strip()
        if inp_Area == "back":
            break
        if inp_Area == "quit":
            case = False
            continue
        if inp_Area not in read_case_2:
            print("区不存在！！！")
            continue

        while case:
            read_case_3 = read_case_2[inp_Area]
            for street in read_case_3:
                print(street)

            inp_street = input("输入所在街道：").strip()
            if inp_street == "back":
                break
            if inp_street == "quit":
                case = False
                continue
            if inp_street not in read_case_3:
                # print(f"没有这个街道")
                continue

            while case:
                read_case_4 = read_case_3[inp_street]
                for store in read_case_4:
                    print(store)
                inp_store = input("输入商铺|公司").strip()
                if inp_store == "back":
                    break
                if inp_store == "quit":
                    case = False
                    continue
                if inp_store not in read_case_4:
                    continue

需求三：

打印99乘法表

for i in range(1, 10):
    for v in range(1, i + 1):
        # print(i, "*", v, "=", i * v, end="\t")
        print(f"{i} * {v} = {i * v}", end="\t")
    print()