老男孩视频学习_week01

新手第一次发帖

梗概                                                                                                                                                                                                    

——————————————————————————————————————————————————————————————————————

第一周的内容相对比较简单，初识了python的发展历史等，了解了一些基础概念，认识了python中的变量，字符编码（ASCII码，Unicode，UTF-8等），用户输入语句input，简单的if-else循环，while循环，for循环等

一下是针对两个作业的代码：

作业一：

# 作业二:编写登陆接口
# 输入用户名密码
# 认证成功后显示欢迎信息
# 输错三次后锁定
import json


with open("user_info.txt") as u_obj:
    user_info = json.load(u_obj)
with open("user_locked_info.txt") as l_obj:
    user_locked_info = l_obj.read().strip()

user_name = input("请输入用户名：")
while user_name in user_locked_info:
    user_name = input("该用户名已被锁定！请重新输入: ")
if user_name in user_info.keys():
    password = user_info[user_name]
    user_password = input("请输入您的密码,共三次机会: ")
    if user_password == password:
        print("Welcome back,%s!" % user_name)
    else:
        i = 1
        while i <= 2:
            input("密码错误，请重新输入，剩余%d次机会： " % (3-i))
            i += 1
            if i == 3:
                with open("user_locked_info.txt", "a") as l_obj:
                    l_obj.write(user_name)
        print("用户账号已锁定！无效登入！")
else:
    print("用户名不存在！")

作业二：

# 作业三:多级菜单
# 三级菜单
# 可依次选择进入各子菜单
# 所需新知识点:列表、字典

city_jiangsu = ["Wuxi", "Nanjing", "Beijing"]
city_beijing = ["Shunyi", "Huairou", "Daxing"]
city_hubei = ["Wuhan", "Qianjiang", "Enshi"]
city_washton = ["Alinton", "CollegePark"]
city_newyork = ["A", "B", "C"]
city_mantana = ["D", "E", "F"]

location = {"China": {"jiangsu": city_jiangsu, "beijing": city_beijing, "hubei": city_hubei},
            "America": {"washton": city_washton, "newyork": city_newyork, "mantana": city_mantana}}

country = input("请输入你的国家(China，America): ")
if country == "China":
    for country_city in location["China"].keys():
        print(country_city)
    city = input("请输入你的城市： ")
    print(location["China"][city])
elif country == "America":
    for country_city in location["America"].keys():
        print(country_city)
    city = input("请输入你的城市： ")
    print(location["America"][city])