day01 作业

标准版

#!/usr/bin/env python# -*- coding: utf-8 -*-username = "wangwu"password = "123"lock_count = 0for i in range(3):    username_input = input("请输入用户名：")    if username_input == username and lock_count < 3:        password_input = input("请输入密码：")        if password_input == password:            print("欢迎登陆！")            break        print("用户名密码错误！")        lock_count += 1        print("%s您已经登陆失败%s次。" % (username_input, lock_count))    elif username_input == username and lock_count == 3:        print("您的账户被锁定，请联系管理员aaa！")        break    else:        print("用户名密码错误！")

 文件版（单文件）

创建一个文件pwd.txt内容如下

www:123:0

wangwu:234:1

zz:345:0

#!/usr/bin/env python# -*- coding: utf-8 -*-user_list = []  pwd_list = []lock_list = []all_list = []with open('pwd.txt', 'r') as pwd_file:     #读取文件内容添加到相应列表中    for i in pwd_file:        all_list.append(i.strip())        user_list.append(i.split(":")[0])        pwd_list.append(i.split(":")[1])        lock_list.append(int(i.split(":")[2]))for i in range(3):      #循环三次    username_input = input("请输入用户名：")    if username_input in user_list:        username_id = user_list.index(username_input)   #取index位置        username = user_list[username_id]           password = pwd_list[username_id]        lock_count = lock_list[username_id]        #锁定次数计数        if username_input == username and lock_count < 3:   #用户名正确并且没有锁定的用户            password_input = input("请输入密码：")            if password_input == password:      #密码正确                print("欢迎登陆！")                break            else:                print("用户名密码错误！")                lock_count += 1                lock_list[username_id] = lock_count     #锁定次数计数                all_list[username_id] = "%s:%s:%s" % (username, password, lock_count)                with open('pwd.txt', 'w') as write_file:    #锁定次数写入文件                    for j in all_list:                        write_file.write(j+"\n")                if lock_count == 3:                    print("%s您已经登陆失败%s次，用户已锁定！" % (username_input, lock_count))                    break                else:                    print("%s您已经登陆失败%s次。" % (username_input, lock_count))        elif username_input == username and lock_count >= 3:            print("您的账户被锁定，请联系管理员aaa！")            break    else:        print("用户名密码错误！")

 多级菜单操作

#!/usr/bin/env python# -*- coding: utf-8 -*-city_dict = {    "北京市": {        "海淀区": ["中关村", "上地", "西二旗"],        "朝阳区": ["望京", "四惠", "大望路"],        "东城区": ["东直门", "东单", "王府井"],        "西城区": ["西直门", "西单", "宣武门"]    },    "上海市": {        "静安区": ["江宁路", "南京西路", "静安寺"],        "普陀区": ["甘泉路", "宜州路", "石泉路"],        "徐汇区": ["徐家汇", "田林", "龙华"]    },    "广州市": {        "天河区": ["天河北", "石牌", "员村"],        "黄埔区": ["鱼珠", "大沙地", "文冲"],        "珠海区": ["新港", "客村", "南岗"]    }}while True:    print("hello world!:")    city_list = list(city_dict.keys())    for k, v in enumerate(city_list):        print(k, v)    input_city = input("请输入城市序号:")    city_name = city_list[int(input_city)]    area_list = list(city_dict[city_name].keys())    while True:        for a, b in enumerate(area_list):            print(a, b)        input_area = input("请输入区域序号，输入b返回上级菜单，输入q退出程序:")        if input_area == "b":            print("您已经返回上级:")            break        elif input_area == "q":            print("程序退出！")            exit()        else:            area_name = area_list[int(input_area)]            road_list = city_dict[city_name][area_name]        while True:            for c, d in enumerate(road_list):                print(c, d)            input_road = input("请输入路序号，输入b返回上级菜单，输入q退出程序:")            if input_road == "b":                print("您已经返回上级:")                break            elif input_road == "q":                print("程序退出！")                exit()            else:                road_name = road_list[int(input_road)]                print(road_name)                exit()