利用装饰器模拟博客园登陆

import os

# 登录状态
status_dic = {
    ‘username‘: None,
    ‘status‘: False
}
flag = True

# 用户名,密码 以字典形式打开
def user_pwd():
    with open("user", encoding="utf-8") as f:
        dic = {}
        for i in f:
            li = i.strip().split("|")
            dic[li[0].strip()] = li[1]
        return dic

# 登录函数
def login():
    u_p = user_pwd()
    count = 0
    while count < 3:
        username = input("请输入姓名: ").strip()
        password = input("请输入密码: ").strip()
        if username in u_p and password == u_p[username]:
            status_dic["username"] = username
            status_dic[‘status‘] = True         # 状态改为True
            print("登陆成功")
            return True
        else:
            print("账号或密码错误,请重新登录")
        count += 1

# 注册函数
def register():
    while 1:
        dict1 = user_pwd()
        username = input("请输入新账号: ").strip()
        password = input("请输新入密码: ").strip()
        if username in dict1:                # 判断用户是否在文件中存在
            print("用户名已存在,请重新输入")
            continue
        elif not username.isalnum():        # 判断用户是否是字母或数字组成
            print("账号含有非法字符,请重新输入")
            continue
        elif 5 < len(password) < 15:         # 限制密码在6-14位之间
            with open("user", encoding="utf-8", mode="a") as f1:
                f1.write(username+"|"+password+"\n")
                print("恭喜!注册成功")
                return True
        else:
            print("密码不合规范,请重新输入")

# 装饰器
def auth(f):            # 限制3-7选项,没有登陆不能访问
    def inner(*args, **kwargs):
        if status_dic["status"]:
            ret = f(*args, **kwargs)
            return ret
        else:
            print("-------登录页面-------")
            login()
            ret = f(*args, **kwargs)
            return ret
    return inner

@auth
def article():
    print(f‘欢迎{status_dic["username"]}访问文章页面‘)
    print("""
    1.写入文件
    2.导入md文件
    """)
    while 1:
        choice = input("请输入要选择的操作:").strip()
        if choice == "1":
            file_name = input("输入文件名:").strip()
            content = input("请输入内容").strip()
            with open(r‘article/‘+file_name, encoding="utf-8", mode="a") as f1:
                f1.write(content)
                print("写入文章成功")
                break
        if choice == "2":
            with open("函数的进阶.md", encoding="utf-8") as f2,                    open(r"article/"+"函数的进阶.text", encoding="utf-8", mode="w") as f3:
                f3.seek(0)
                for i in f2:
                    f3.write(i)
                print("导入文件成功")
                break
        else:
            print("您输入的不合规范")

@auth
def diary():
    print(f‘欢迎{status_dic["username"]}访问日记页面‘)

@auth
def comment():
    print(f‘欢迎{status_dic["username"]}访问评论页面‘)
    file = os.listdir(os.path.dirname(__file__)+‘/article‘)  # 把article文件夹里的文件,变成列表形式
    for index, obj in enumerate(file, 1):                    # 循环列表
        print(index, obj)
    while 1:
        choice = input("请输入要评论的文章的序号:").strip()
        if choice.isdigit():
            choice = int(choice)
            if 0 < choice <= len(file):                          # 限制用户输入序号的范围
                path = os.path.join(os.path.dirname(__file__)+‘/article‘, file[choice-1])   # 拼接路径,找到该文件
                with open(path, encoding="utf-8", mode="r+") as f1:
                    ret = f1.read()
                    print(ret)
                    content = input("请输入要评论的内容")
                    sensitive = ["苍老师", "东京热", "武藤兰", "波多野结衣"]         # 此列表为敏感字符
                    for i in range(len(sensitive)):                          # 敏感字符替换等长度*
                        if sensitive[i] in content:
                            content = content.replace(sensitive[i], ‘*‘ * len(sensitive[i]))
                    if "-"*20 not in ret:                             # 判断如果不在这里加上"评论区"三个字
                        f1.write("评论区:" + "\n" + "-"*20 + "\n" + f‘{status_dic["username"]}:\n{content}‘ + "\n")
                        print("评论成功")
                        return True
                    else:                                  # 否则直接写入评论
                        f1.write(f‘{status_dic["username"]}:\n{content}‘ + "\n")
                        print("评论成功")
                        return True
            else:
                print("请选择正确的文章序号")
        else:
            print("输入内容含有非法字符")

@auth
def enshrine():
    print(f‘欢迎{status_dic["username"]}访问收藏页面‘)

# 注销
def login_out():
    status_dic[‘username‘] = None
    status_dic[‘status‘] = False
    print(‘注销成功‘)

# 退出程序
def exit_program():
    global flag
    flag = False
    return flag

def run():
    choice_dict = {
        1: login,
        2: register,
        3: article,
        4: diary,
        5: comment,
        6: enshrine,
        7: login_out,
        8: exit_program,
    }

    while flag:
        print(‘‘‘
        欢迎来到博客园首页
        1:请登录
        2:请注册
        3:文章页面
        4:日记页面
        5:评论页面
        6:收藏页面
        7:注销
        8:退出程序‘‘‘)
        choice = input(‘请输入您选择的序号:‘).strip()
        if choice.isdigit():
            choice = int(choice)
            if 0 < choice <= len(choice_dict):
                choice_dict[choice]()
            else:
                print("您输入的超出范围")
        else:
            print("输入不合规范,重新输入")

if __name__ == ‘__main__‘:
    run()

原文地址：https://www.cnblogs.com/duyu123/p/11116754.html